Working with UIAlertController in Swift (NS_CLASS_AVAILABLE_IOS(8_0))

A UIAlertController, replaces prior UIActionSheet and UIAlertView classes for displaying alerts from iOS 8.

Declare alert controller:

var alert : UIAlertController?

Initialise alert controller:

• UIAlertControllerStyleAlert

// UIAlertController Initializer

alert = UIAlertController(title: "Your Title", message: "Your Message", preferredStyle: .Alert)

//UIAlertController with UIAlertActions

alert = UIAlertController(title: "Your Title", message: "Your Message", preferredStyle: .Alert)


let Yes = UIAlertAction(title: "Yes", style: .Default, handler: {(alertAction: UIAlertAction!) in self.alert!.dismissModalViewControllerAnimated(true)})


let No = UIAlertAction(title: "No", style: .Default, handler:{(alertAction: UIAlertAction!) in self.alert!.dismissModalViewControllerAnimated(true)})

alert!.addAction(Yes)

alert!.addAction(No)

//UIAlertController with UIAlertActions & Input Textfields

alert = UIAlertController(title: "Your Title", message: "Your Message", preferredStyle: .Alert)

let Yes = UIAlertAction(title: "Yes", style: .Default, handler: {(alertAction: UIAlertAction!) in self.alert!.dismissModalViewControllerAnimated(true)})

let No = UIAlertAction(title: "No", style: .Default, handler:{(alertAction: UIAlertAction!) in self.alert!.dismissModalViewControllerAnimated(true)})

alert!.addAction(Yes)

alert!.addAction(No)

alert!.addTextFieldWithConfigurationHandler({(textField: UITextField!) in textField.placeholder = "UserName"})

alert!.addTextFieldWithConfigurationHandler({(textField: UITextField!) in textField.placeholder = "Password"; textField.secureTextEntry = true})

• UIAlertControllerStyleActionSheet

//UIAlertController with ActionSheet

alert = UIAlertController(title: "Your Title", message: "Your Message", preferredStyle: .ActionSheet)

let Yes = UIAlertAction(title: "Yes", style: .Default, handler: {(alertAction: UIAlertAction!) in self.alert!.dismissModalViewControllerAnimated(true)})

let No = UIAlertAction(title: "No", style: .Default, handler:{(alertAction: UIAlertAction!) in self.alert!.dismissModalViewControllerAnimated(true)})

alert!.addAction(Yes)

alert!.addAction(No)

Present alert controller:

self.presentViewController(alert!, animated: true, completion: nil)

Reference: https://developer.apple.com/library/prerelease/iOS/documentation/UIKit/Reference/UIAlertController_class/index.html

GitHub:
https://github.com/bhvk121/UIAlertController_iOS8

Export Text As Audio File in MAC OS

1) Find Automator from spotlight and run it. Then Select new service template

2) Add new action "Text to Audio File" in workflow by drag & drop
3) Adjust / Customise options as required 

4) Run Workflow
5) Save Service with appropriate name

• To use this service and export an audio file, openup any application on your Mac and select the text you would like to be converted to Audio.


• With the text selected, click on the application name in the menu bar.


• Select the name of the service that you just saved in Automator from underneath the Services menu listing.


• After clicking on the service, a new audio file will appear on your destination given in service while setup, after a few seconds.


• This file will read aloud the text you selected in the application.

Introducing Swift programming language

Swift, Programming language  without the constraints of C compatibility,  Introduced by at WWDC 2014 keynote. Which has been met with a positive & exciting response from the whole apple and apple developers community.

So far Apple’s default development environment for iOS, Xcode, has been using the language Objective-C since iOS release; It was highly adopted by Apple, and has written Cocoa /  Cocoa -Touch  framework APIs with Objective-C.

Swift uses the same LLVM compiler and runtime as Apple’s Objective-C implementation, so Swift and Objective-C code can live side-by-side in the same application. The language provides access to all of the Cocoa and Cocoa Touch features developers are currently used to from Objective-C.

Xcode 6 comes with deeply integrated Swift support.It will feature an interactive “Playground” that allows you to edit your code and watch how your changes influence your app in real-time. Xcode’s debugging console now also supports Swift syntax natively.As per Greg Federighi, Apple senior vice president for software engineering,

"Swift is fast, it is modern, it is designed for safety, and it enables a level of interactivity and development that you've never seen before on the platform"The main concept behind Swift existence is to remove overhead caused by C language dependancy and keep Apple's adopted Objective-C language feel as it is.

Swift features such capabilities as,

• Closures (similar to blocks in C and Objective-C) unified with function pointers
• Tuples and multiple return values
• Generics
• Fast and concise iteration over a range or collection
• Structs that support methods, extensions, protocols.
• Functional programming patterns, e.g.: map and filter

Some swift code snippet :

• //let keyword to make a constant, var keyword to make a variable
  var variable = 90
  variable = 67
  let constant = 88
  
  //create array using square brackets []
  var languageList = ["C", "Objective C", "JAVA"]
  languageList[1] = "Swift"
  

Apple states by introducing swift : "Swift is an innovative new programming language for Cocoa and Cocoa Touch. Writing code is interactive and fun, the syntax is concise yet expressive, and apps run lightning-fast. Swift is ready for your next iOS and OS X project — or for addition into your current app — because Swift code works side-by-side with Objective-C."

Developers can start development with Swift to implement new application features or enhance existing features. Apps built with swift can be submitted to the App Store and Mac App Store when iOS 8 and OS X Yosemite are released this fall.

Reference / More Info :
https://developer.apple.com/swift/
https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/
https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/BuildingCocoaApps/

Introducing UIKit Dynamics

Concern : As animation is so important and allows to represent things in more realistic manner, iOS 7 came with new catalog UIKit Dynamics. lets adopt it!

Outcome : Idea & understanding of UIKit Dynamics and concern things.

Description :

• UIKit Dynamics which has been introduced from iOS 7, facilitate typical UIViews which conforms to   UIDynamicItem  protocol to behave more lively.
• New framework allow us to relate our UIKit views with real life factors like gravity, resistance, friction, collision and so on.
• Dynamics on views can be achieved by directly adding primitive behaviour and also by adding custom behaviour which may be combination of primitive behaviours.

Main Roles:     

• Two components playing main or say major roles to dynamics let happen, which are :

1. UIDynamicAnimator  :
   - Acts as UIKit physics engine.
   - Takes reference of  UIView which aspire to adopt dynamics.
   - Accepts various UIDynamicBehaviours and make referenced view to act accordingly.
2. UIDynamicBehaviour :

- Allows to configure view behaviour in physics (real) world.
- Inherited by primitive dynamic behaviours which are,

UIGravityBehavior,
To make our dynamic view real and alive, we can apply gravity on it by this behaviour which makes view to fall within referenced view as if it is in real world.
     
UIAttachmentBehavior,
As name suggest, this behaviour allows view to act as if it attached to some point in referenced view and also with other dynamic item.

UICollisionBehavior,
When our views move there is a chance of collision between them or with the boundaries of the referenced view.

By using this behaviour this kind of collision can be handled in more subtle way. Boundaries for the collision can be defined as bound of referenced view or any other boundary defined by lines or Bezier path. 
      
UIPushBehavior,
Simulates effect of pushing dynamic items in specific direction with defined force.

Two kind of forces : 
Instantaneous: acts as sudden strong push at once, which will result in quick velocity gain at start, which gradually lose momentum and eventually stops.

Continuous:  is applied continuously on dynamic item causing gradual acceleration. 


UISnapBehavior,
Allows to add snap behaviour on view, by which view behaves as if it is pulled suddenly and will stop at given point by completing oscillation specified in form damping.

UIDynamicItemBehavior,
Allows to add additional properties like density, friction, rotation etc to dynamic items which will affect primitive behaviours and hence dynamic item behaviour.
     - can be inherited by custom class to achieve more custom behaviour.

Lets see how to achieve this by code,

Configure UIDynamicBehaviours

• // get UIGravityBehavior instance
  UIGravityBehavior *gravityBehavior =
  [[UIGravityBehavior alloc]initWithItems:@[view1, view2, ...]];
  
  // set gravity direction
  CGVector vector = CGVectorMake(0.5, 0.5);
  [gravityBehavior setGravityDirection:vector];
  
  // For customised gravity behaviour set Angle,magnitude
  gravityBehavior.angle = DEGREES_TO_RADIANS(45);
  gravityBehavior.magnitude = 2.0f;
  
  


BreakPoint :
• The default value for the gravity vector is (0.0, 1.0)
• The acceleration for a dynamic item subject to a (0.0, 1.0) gravity vector is downwards at 1000 points per second²
• magnitude of 2.0 represents an acceleration of 2000 points / second²

- UICollisionBehavior

• //collision behaviour between view1 and view2, which results in real time collision between these views and based on their characteristics like angle,magnitude etc. physics engine will apply effect on views as per physics law.
  
  UICollisionBehavior *collisionBehaviour =
  [[UICollisionBehavior alloc] initWithItems:@[view1, view2]];
  
  
  //convert referenced view bound as collision boundary, which will stop views to go out of the screen bound.
  collisionBehaviour.translatesReferenceBoundsIntoBoundary = YES;
  
  //set boundary other than referenced view bounds, by setting insets
  collisionBehaviour.setTranslatesReferenceBoundsIntoBoundaryWithInsets:UIEdgeInsetsMake(20.0f, 20.0f, 20.0f, 20.0f);
  
  


Some variant of collision modes,  

• collisionBehaviour.collisionMode = UICollisionBehaviorModeItems;
  

(saying that collision will occur only with views involved in collision behaviour, no collision with boundary)



• collisionBehaviour.collisionMode = UICollisionBehaviorModeBoundaries;
  
  

(saying that views will not collide internally, only collision with boundary)



• collisionBehaviour.collisionMode = UICollisionBehaviorModeEverything;
  

(saying that collision will occur with views internally as well as with boundary, this is DEFAULT mode if we do not specify externally)

- Fortunately UICollisionBehavior comes with UICollisionBehaviorDelegate, which allows to get notifications on each collision to perform customised actions on views.



• // implement delegate 
  @interface ViewController () <UICollisionBehaviorDelegate>
   
  @end
  
  
  //set delegate collisionBehaviour
  collisionBehaviour.collisionDelegate = self;
  
  
  // implement following methods depending on case
  - (void)collisionBehavior:(UICollisionBehavior*)behavior beganContactForItem:(id <UIDynamicItem >)item1 withItem:(id <UIDynamicItem>)item2 atPoint:(CGPoint)p;
  
  - (void)collisionBehavior:(UICollisionBehavior*)behavior endedContactForItem:(id <UIDynamicItem >)item1 withItem:(id<UIDynamicItem>)item2;
  
  
  // The identifier of a boundary created with translatesReferenceBoundsIntoBoundary or setTranslatesReferenceBoundsIntoBoundaryWithInsets is nil
  - (void)collisionBehavior:(UICollisionBehavior*)behavior beganContactForItem:(id <UIDynamicItem>)item withBoundaryIdentifier:(id <NSCopying>)identifier atPoint:(CGPoint)p;
  
  - (void)collisionBehavior:(UICollisionBehavior*)behavior endedContactForItem:(id <UIDynamicItem>)item withBoundaryIdentifier:(id <NSCopying>)identifier;
  
  
  // Ex. removing items on collision
  - (void)collisionBehavior:(UICollisionBehavior *)behavior beganContactForItem:(id <UIDynamicItem>)item1 withItem:(id <UIDynamicItem>)item2 atPoint:(CGPoint)p{
  
  [(UIView *)item1 removeFromSuperview];
  
  [(UIView *)item2 removeFromSuperview];
  }
  
  


- UIAttachmentBehavior

• UIAttachmentBehavior *attachmentBehaviour = [[UIAttachmentBehavior alloc] initWithItem:view1 attachedToItem:view2];
  

(Saying that view1 is attached to view2, considering no offset from center of views i.e centre point of views are taken as base)



• CGPoint anchorpoint = CGPointMake(500, 500);
  UIAttachmentBehavior  *attachmentBehaviour = [[UIAttachmentBehavior alloc] initWithItem:view1
  attachedToAnchor:anchorpoint];
  [attachmentBehaviour setFrequency:5.0];
  [attachmentBehaviour setDamping:0.5];
  

(Saying that view1 is attached to point (500, 500) of referenced view, with considering centre of view1 as base)

BreakPoint :

Damping & Frequency acts same as per its physics law, learn more:
• Damping Science
• Frequency Science




• CGPoint anchorpoint = CGPointMake(500, 500);
  UIOffset offset = UIOffsetMake(40, 40);
  UIAttachmentBehavior *attachmentBehaviour = [[UIAttachmentBehavior alloc] initWithItem:view1
  offsetFromCenter:offset attachedToAnchor:anchorpoint];
  

(Saying that view1 is attached to point (500,500) of referenced view with considering point calculated by offset for centre point)

- UISnapBehavior



• CGPoint point = CGPointMake(100, 100);
  
  UISnapBehavior *snapBehaviour =
  [[UISnapBehavior alloc]initWithItem:view1 snapToPoint:point];
  
  snapBehaviour.damping = 1.0;
  
  

(Saying that view1 is to be snapped to point (100,100) )

BreakPoint :

• value of damping ranges between 0.0 to 1.0, 1.0 results in maximum oscillation

- UIPushBehavior




• UIPushBehavior *pushBehavior = [[UIPushBehavior alloc] initWithItems:@[view1] mode:UIPushBehaviorModeInstantaneous];
  
  or
  
  UIPushBehavior *pushBehavior = [[UIPushBehavior alloc] initWithItems:@[view1] mode:UIPushBehaviorModeContinuous];
  
  pushBehavior.magnitude = 5.0f;
  
  CGVector vector = CGVectorMake(0.2, 0.2);
  
  pushBehavior.pushDirection = vector;
  
  

(Saying that view1 is liable for instantaneous or continuous force at specified vector & magnitude applied)

BreakPoint :

• By default push is applied to centre of dynamic item unless offset of attachment is set.
• default magnitude is nil equivalent to no force.
• A continuous force vector with a magnitude of 1.0, applied to a 100 point x 100 point view whose density value is 1.0, results in view acceleration of 100 points / second² in the direction indicated by the angle or pushDirection property.
• The default x and y values of the push direction vector are each 0.0. A value for either component of 1.0, applied to a 100 point x 100 point view, whose density value is 1.0,results in view acceleration of 100 points / second² in the positive direction for the component.

- UIDynamicItemBehavior




• //intiate instance with referenced view
  UIDynamicItemBehavior *dynamicBehavior = [[UIDynamicItemBehavior alloc]
  initWithItems:@[view1, view2, ...]];
  
  //set elasticity, higher elasticity makes item more bouncy
  dynamicBehavior.elasticity = 0.2;
  
  //set overall resistance, greater resistance yields sooner animation / effect stop
  dynamicBehavior.resistance = 0.5;
  
  //set friction, resistance when item collides with other items
  dynamicBehavior.friction = 0.5;
  
  //set density, mass of item - higher mass makes hard to accelerate and decelerate item
  dynamicBehavior.density = 1.0;
  
  // allow rotation, flag to enable/disable rotation
  dynamicBehavior.allowsRotation = TRUE;
  
  //set angularResistence,resistance for rotation - higher value makes rotation to stop sooner
  dynamicBehavior.angularResistance = 0.5;
  
  //add angular velocity, increase or decrease angular velocity of view by positive or negative value respectively measured in radian per second
  [dynamicBehavior addAngularVelocity:10.0 forItem:view1];
  
  //add linear velocity, increase or decrease angular velocity of view by positive or negative value respectively measured in points per second
  [dynamicBehavior addLinearVelocity:CGPointMake(150, 150) forItem:view1];
  
  


- Combination of behaviours

• // Create multiple behavior objects here
  
  UIDynamicBehavior *combinedBehavior = [[UIDynamicBehavior alloc]init];
  
  [combinedBehavior addChildBehavior:gravityBehavior];
  [combinedBehavior addChildBehavior:collisionBehaviour];
  [combinedBehavior addChildBehavior:attachmentBehaviour];
  [combinedBehavior addChildBehavior:snapBehaviour];
  
  
  //add / remove item from behaviour
  [gravityBehavior addItem:view3];
  [attachmentBehaviour removeItem:view1];
  
  


Configure UIDynamicAnimator

• @property (strong, nonatomic) UIDynamicAnimator *animator;
  
  _animator = [[UIDynamicAnimator alloc] 
  initWithReferenceView:self.view];
  
  // add behaviours to animator to make it live
  [_animator addBehavior: gravityBehavior];
  [_animator addBehavior: collisionBehaviour];
  [_animator addBehavior: attachmentBehaviour];
  [_animator addBehavior: snapBehaviour];
  [_animator addBehavior: combinedBehavior];
  
  

Conclusion : UIKit Dynamics is amazing new feature which can add life to application, by adding real world like effects and animations.

Taking imagination to next level !

Create custom code snippet in Xcode

Concern:

Xcode comes with inbuilt code snippet library to provide code skeleton to implement repeatedly used code quickly.

Fortunately we can update this list of snippets in library and add our own custom snippet which we need most of the time in our life!
 

Outcome: 

Our own custom snippet to save implementation time.
 

Description: 

we have been using many of the snippet in Xcode which makes it easier to implement code like for, while, switch and most used init code snippet.
 

Let's add our own custom code snippet, by taking example NSString method -  

+ (instancetype)stringWithFormat:(NSString *)format;

for example, with out code snippet we have to type all the syntax every time we want to implement this method, [NSString stringWithFormat:@"%@",];

Now lets add snippet for this,

• Type statement which you want to come up automatically on calling snippet.

         [NSString stringWithFormat:@"", ];

• Select and Add this code to snippet library.

Select code and drag it to snippet library, which can be activated by  View > Utilizes > Show Code Snippet Library or press control + option + cmd + 2 in Xcode.

On success, we will find New snippet added in library named "My Code Snippet".

• Edit snippet

Click newly added snippet to activate snippet summery pop up.

Click on edit, which will allow to modify snippet more specifically.

1. Title, is a snippet name by which that snippet will be called
2. Summery, which shows brief function of snippet
3. Platform, allows to select platform OS X or iOS or Both
4. Language, allows to specify language snippet belongs to
5. Completion Shortcut, allows to set shortcut for snippet
6. Completion Scope, allows to set scope, where snippet will be available

• For our example,

Title : strWithFormate
Summary : snippet for stringWithFormat

Platform : All
Language : Objective C
Completion Shortcut : strWithFormate
Completion Scope : All

• Add bubble to accept values

edit snippet code by,

[NSString stringWithFormat:@"<#type#>", <#expression#>];
which adds bubble to accept values for data type and expression we are going to log.

• Done!
  Now if we type strWithFormate and hit enter, we will get
   [NSString stringWithFormat:@"<#type#>", <#expression#>];
  and by pressing TAB, we will able to assign values to pre populated bubbles.

Conclusion:

Before: 

 

After:

 

Comments / Suggestions are welcomed!

        

Capture & Customize Screenshots on MAC OS

In addition to large number of cool features, mac os provides convenient way to take screen shots of your screen, part of screen, active part of screen etc.

Here is how to get it:

Capture:
1) Capture part of a screen: Press Command+Shift+4, as soon cursor get changed you can start dragging mouse to select part to capture, once whole portion selected just release mouse. (it can be cancelled meantime by pressing Esc to re correct selection) On successful node you will hear typical camera shutter sound!

2) Capture Entire Screen: Press Command+Shift+3, it will capture your entire visible screen, so make sure that all content you needed in snap is visible on screen.

Notice: Above two actions saves captured screenshots on desktop by default, we will see later on how to change that default location.

3) Capture individual window: Press Command+Shift+4 then press Space, in (1)st action if you press space after updated icon, cursor will turn to camera icon which let you select individual window to capture. just click after selecting particular window to capture.


4) Capture & Copy: Press Command+Control+Shift+4, behaves same as (1)st action, but instead save snap directly to desktop it keeps copy to clipboard, which can be pasted to desired doc or emails.

Command+Control+Shift+3, behaves same as (2)nd action with copy to clipboard functionality.-Command+Control+Shift+4 then Space, behaves same as (3)rd action with copy to clipboard functionality.


Customize:
After changing each of below property, we need to restart SystemUIServer for the changes to take effect by firing below command:

cmd : killall SystemUIServer

• Change type of captured image:

            cmd : defaults write com.apple.screencapture type 'type'
             (possible types are png, jpg, gif etc)

• Change name prefix of captured image:

cmd : defaults write com.apple.screencapture name 'name'

 

• Change default path:

       - Create New folder at desired path to save captured screen shots

        cmd : defaults write com.apple.screencapture location 'path to created new folder'

Now onwards your captured screen shots will be saved in folder you have specified.

Any suggestions / comments / queries appreciated!

Introducing iOS 7

• On 10th june of 2013, In Worldwide Developers Conference in San Francisco, Apple unveiled the latest iteration of its mobile operating system iOS7.
• iOS 7 features a major design overhaul that removes many of the traditional elements found in previous versions of iOS, instead favoring a clean and clear "flat" look. Demo screens of all of the apps can be found on Apple's iOS 7 website.
• Tim Cook (CEO at Apple Inc) had mentioned iOS7 as a biggest change to iOS since introduction of the iPhone. Jony Ive (Senior Vice President of Design at Apple Inc) had words on iOS7 : "It has a whole new structure that is coherent and that is applied across the entire system, We've considered the tiniest details like refining the typography to much larger ones like redesigning all the icons."

Design

   

• The iOS 7 User interface has been completely redesigned. Throughout the system, a sharpened focus on functionality and on the user's content informs every aspect of design. Translucency, refined visual touches—and fluid, realistic motion—impart clarity, depth, and vitality to the user experience are main qualities to keep in mind as on working on design of any app for iOS 7. 
• The new design is significantly different from older with all new multitasking screens and a totally redesigned user interface. The icons are "flat" with bright new colors. Apps like Game Center have been entirely overhauled, with the removal of the felt and wood elements in favor of a design that relies heavily on black and white with colored accents. 
• iOS 7 incorporates new motion tracking capabilities. As the device is moved in the hand, it actually tracks motion and the screen moves, which carries over across the system. 
• A new dynamic weather app introduced which incorporates some live weather elements. For example, if it is cloudy around you, the app will show cloudy behaviour and It uses an all new font. Like the Weather app, the Calendar also features a extreme new design. 
• Messages has seen a major overhaul, with a blue and white interface. Swiping on the screen in messages allows users to go from individual messages to a messages overview. Mail box has the same no-frills interface, focusing on text and photos. It supports full screen photos. 

Notification Center

• Notification Center looks entirely different as well, with new daily overviews that let users know about new mail, missed calls, to-dos, and more. Notification Center can be accessed from any screen, including the Lock Screen, with a downwards swipe.

Control Center 

• Control Center offers new preference controls. Swipe up from the bottom of the screen (including the lockscreen) to find quick access to preferences. It has switches that allow users to access Wi-Fi, turn on Airplane Mode, toggle Do Not Disturb, adjust brightness, and control music, among other things. 

Multitasking

• iOS 7 offers up a smarter way to multitask. When users tap the home button twice, it will display preview screens of apps that are open. Unlike before, the screens are previews of actual apps rather than just a small app icon. 
• iOS 7 incorporates a learning algorithm that takes note of when users utilize certain apps and keeps those up to date with new content before they are launched. So, for example, if someone wakes up and checks Mail box, iOS 7 will learn that behavior and have MailBox updates ready to go in the background before the app is opened. The new mobile OS also uses intelligently scheduled updates and will update during power efficient times. 

 

Safari

 

• Safari gets a number of improvements in iOS 7, including a new full screen look and a smart search field which allows one tap access to favorites, and it also has a new tabbed interface along with parental controls and iCloud keychain integration. 
• The new Safari eliminates the eight browser tab limit and tabs can now be closed with a quick sideways swipe. Safari incorporates the new iCloud Keychain functionality, remembering account names, passwords, and credit card numbers, as well as generating unique, hard-to-guess passwords. 

AirDrop

• AirDrop is included with iOS 7, making it easier for users to share photos, videos, contacts, and other content with other iPhone owners. This is system wide and can be used with any app that supports the API.
• Simply tapping the new "Share" will allow users to connect via WiFi or Bluetooth. Recipients can choose to save what is sent, and saved items will be saved in appropriate locations. For example, a shared contact ends up in the Contacts app, while a shared photo ends up in the Photos app. It will be available on Apple's newest devices, including the iPhone 5 and the fourth generation iPad, as well as the iPad mini. 

Camera, Video

• iOS 7 introduces a redesigned camera app that includes photo filters, and incorporates a new "square" capture mode. There are now a total of four camera modes, including Video, Panorama, Still, and Square.
• The Photos app has been redesigned as well, offering an improved photo organization system. iOS knows when and where photos were taken and this information is used to organize photos into folders called "Moments." 
• It allows  to capture video at 60fps, so you can replay dramatic scenes in slow motion. also can get closer look by directly controlling the zoom level of the camera. 
• Creating video effects and transitions by combining multiple video tracks using the custom video compositing APIs and Scanning and recognising barcodes with the camera are also included.

Siri

• Siri has been given a "gorgeous" new interface along with new voice options that include a male voice and voices for the French and German languages, with support for additional languages to come in the future. 
• Siri has also gotten smarter, so it can now perform tasks like turning on Bluetooth or increasing device brightness, as well as playing voicemails and controlling iTunes Radio.

iOS in the Car

• iOS 7 is designed to provide enhanced integration with in-dash systems, displaying iOS on in-car monitors to make calls, get messages, and more. Vehicles that are equipped with iOS in the Car can connect to the iPhone 5 and interact with it using the car's built-in display. 

Games

• iOS 7 introducing powerful new Sprite Kit framework to develop high-performance 2D games, which combines everything you need to animate sprites, simulate physics and create beautiful particle systems all in one easy-to-use set of APIs. 

• Hand the controls over to your users by adding support for upcoming MFi (Made-for-iPhone/iPod/iPad) game controllers to your game. And the re-designed Game Center adds more modes for turn-based games and more leaderboards, as well as allowing you to authenticate players, and securely transmit game scores and achievements.

Inter-App Audio

• Now your apps can make beautiful music together. With Inter-App Audio, apps can register their audio streams to share with other apps. 
• For example, a series of apps could publish audio streams of instrument tracks while another uses the combination of these streams to compose a song. Inter-App Audio also provides for MIDI control of audio rendering, remotely launching other registered Inter-App Audio apps and more.

Maps

• iOS 7 introduces directions APIs, enabling you to guide users to their destinations from within your app. 
• Allow your users to rotate and move around the map in 3D using updated views and controls. And you have even more control of overlays, making it possible to place them at different layers or replace portions of the map altogether.

App Store 

• The App Store has been entirely redesigned with the same black and white look featured in many of the apps in iOS 7.
• It is now easier to find apps than ever before. "Apps Near Me" allows users to find the apps that are in use nearby, and there are also new discovery tools for parents and children. 
• The App Store will now update apps automatically, doing away with manual updates. Music, too, has been updated with support for iTunes Radio, Apple's new streaming music service. iTunes Radio is free, ad-supported (ad-free for iTunes Match subscribers), and available on iOS, Apple TV, and the Mac. 

Activation Lock 

• Activation Lock is designed to be a theft deterrent. It adds a new feature that requires an Apple ID and password to access and turn off Find My iPhone or to wipe a device. 
• That means if a device is stolen and a thief tries to wipe it, the phone will not be able to be reactivated without its accompanying iCloud login. Even after a device is erased, Find my iPhone will continue to display a custom message. 

APIs 

• The SDK includes more than 1500 new APIs, including AirDrop support, MFi Game Controllers, UI Dynamics, New Multitasking APIs, SpriteKit, Barcode Scanning, and more.

Device Support & Release date for iOS 7 beta

• iOS 7 beta supports iPhone 4, iPhone 4S, iPhone 5, iPod touch (5th gen) , iPad 2, iPad with Retina display, and iPad mini.
• iOS 7 is available for developers from its release date which is 10th of june 2013, on the iPhone, with iPad support coming at a later date. 
• iOS 7 will be available for consumers this autumn.

Let's end up with some quick comparison and pros & cons of iOS 7 

change in look (left side is iOS 7!)

pros:

• Complete UI overhaul with adaptive colors and system-wide Back swipe gesture
• New system icons and folders, animated icons available
• Control Center with toggles, multimedia controls and shortcuts
• Updated Notification Center with three tabs
• Updated Safari browser with unified search filed
• iTunes radio 
• AirDrop file sharing
• Camera filters with live preview and new square mode
• New Photos app with better photo organization, picture editing
• Weather app with live weather animations
• Updated Maps with Night mode and Turn-by-Turn walking directions
• New Siri interface, new supported commands, new voices
• FaceTime audio
• Activation lock
• Automatic app update
• Chinese-English, Italian, Korean and Dutch dictionaries
• iOS in the Car coming in 2014 in selected cars
• New introduced Game framework "Sprite kit" targeted for iOS 7 and above & Apple's future product Apple TV 

 cons:

• Very iTunes dependent for uploading files and multimedia
• No widgets
• AirDrop can only be used by iPhone 5, iPad 4th generation, iPad Mini and iPod Touch 5th generation and iCloud account for this feature is must
• Camera mode - "panorama" does not support iPad. Camera Filters only support iPhone 5 and iPod Touch 5
• iOS 7 beta has been experienced bit slower than its ancestor
• No lockscreen shortcuts (besides those in the Control Center)
• Limited codecs support
• iTunes radio only works in the US