Get list of all Videos

ALAssets library has deprecated in iOS9, and Apple introduce new framework  'Photos Framework' for retrieve assets for display and playback, edit image or video content, or work with collections of assets such as album, moments, and iCloud Shared Album.

Features:
1. Fetching objects and requesting changes
    Class's instance of Photos framework model retrieve assets(images, videos,  and Live Photos), collections of assets(albums or moments), and list of collections(such as album folder or moment clusters). There objects are read only, immutable and contain metadata only.
2. Change observing.
3. Support for Photos app features.
4. Assets and thumbnail loading and caching.
5. Assets content editing.

For details about Photos framework Click here

In this part of blog we will fetch all video assets from device(Photos app).
PHAssets:
All images, videos and live photos in Photos library represented by an instance of PHAssets.
 Instances of PHAsset are immutable.

PHFetchResult:
An ordered list of assets or collections returned from Photos fetch methods.
Photos provide all assets in the in a fetch result.

PHImageManager:
PHImageManager provide methos for retrieving and generating preview thumbnails and full-size image or video data associated with assets instance.

Below chunk of code for retrieving list of video' assets from Photos application.

-(void) getAllVideoAssets{
    NSMutableArray *assets = [[NSMutableArray alloc] init];
    //Fetch all video assets from Photos
    PHFetchResult *assetResults = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeVideo options:nil];
    //get all assets
    for (PHAsset *asset in assetResults){
        NSLog(@"asset type = %zd", asset.mediaType);
        [assets addObject:asset];
    }
    self.allVideoslistArray = [[NSMutableArray alloc] init];
    //create an instance of PHImageManager
    PHImageManager *manager = [PHImageManager defaultManager];
    for(PHAsset *asset in assets){
        //block of code for represent video assets
        [manager requestAVAssetForVideo:asset options:nil resultHandler:^(AVAsset * _Nullable asset, AVAudioMix * _Nullable audioMix, NSDictionary * _Nullable info) {
            if ([asset isKindOfClass:[AVURLAsset class]]) {
                NSURL *url = (NSURL *)[[(AVURLAsset *)asset URL] fileReferenceURL];
                UIImage *thumbnail = [self createThunbnailImage:url];
                [self.allVideoslistArray addObject:@{@"VideoUrl":url,@"ThumbnailImage":thumbnail, @"VideoAsset":asset}];
            }
        }];
    }//end for loop
}

Text Animation

A well design  user interface is a key feature of an application.  A end user only interact with UI part an application, so making an  attractive user interface  force user to play with application.
A small small effect like animation help to improve interface design.

In this blog, i am going to display text message with animations.
Click here for download "TextAnimationView" classes.

Create a new project(TextAnimationApplication).
and add downloaded classes to project

Now go to ViewController.m class and import "TextAnimationView.h" file
and declare a variable

TextAnimationView *textAnimationView;                                                        

define below method to add TextAnimationView to ViewController's view

-(void) addTextAnimationView{
//initialize instance
    textAnimationView = [[TextAnimationView alloc] initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 100) withMessage:@"It's a sample marquee message."];
    [self.view addSubview:textAnimationView];
//Default text appearance animation
    [textAnimationView displayMessageViewWithPresentationType:AnnouncementViewPresentWithCenterAnimation withSpinAnimation:YES];
}

In ViewController.h class declare an IBAction method

-(IBAction)buttonAction:(UIButton *)sender;


Now Switch to main.storyboard file and add UIButtons for different different animations.

In the sample project i added 10 buttons for display text message with 10 different-different animation. Add all buttons with declared method with TouchUpInside event.

Define IBAction method in ViewController.m, file

-(IBAction)buttonAction:(UIButton *)sender{
    switch (sender.tag) {
        case 1://display text with scale transform           
[textAnimationView displayMessageViewWithPresentationType:TextAnimationViewPresentWithCenterAnimation withSpinAnimation:YES];
            break;
        case 2:
// display text animation view from top of the screen to declared frame with simple animation.
            [textAnimationView displayMessageViewWithPresentationType:TextAnimationViewPresentWithTopAnimation withSpinAnimation:NO];
            break;
         case 3:
// display text animation view from left of the screen to declared frame with spin animation.
             [textAnimationView displayMessageViewWithPresentationType:TextAnimationViewPresentWithLeftAnimation withSpinAnimation:YES];
            break;
        case 4:
// display text animation view from alpha value animation with spin animation.       
     [textAnimationView displayMessageViewWithPresentationType:TextAnimationViewPresentWithAlpha withSpinAnimation:YES];
            break;
        case 5:
// display text animation view from the bottom of the screen to declared frame with spin animation.
             [textAnimationView displayMessageViewWithPresentationType:TextAnimationViewPresentWithBottomAnimation withSpinAnimation:YES];
            break;
        case 6:
// display text animation view from right of the screen to declared frame with out spin animation.
             [textAnimationView displayMessageViewWithPresentationType:TextAnimationViewPresentWithRightAnimation withSpinAnimation:NO];
            break;
        case 7:
// display text animation view with marquee animation from right
             [textAnimationView setTextMarquee:YES withDirectionType:TextMarqueeFromRight];
            break;
        case 8:
// display text animation view with marquee animation from left
             [textAnimationView setTextMarquee:YES withDirectionType:TextMarqueeFromLeft];
            break;
        case 9:
// display text animation view with marquee animation from Top            [textAnimationView setTextMarquee:YES withDirectionType:TextMarqueeFromTop];
            break;
        case 10:
// display text animation view with character animation(one by one character animation)
             [textAnimationView displayTextWithTypingAnimation:@"It's a sample marquee message."];
            break;
           
        default:
            break;
    }
}

Now run the project and click on buttons for display text message with animations.
Click here for download sample project.

Analyz Crash Reports

When an application crashes on an iOS device, a "crash report" is created and stored on the device. Crash reports describe the conditions under which the application terminated, in most cases including a complete stack trace for each executing thread, and are typically very useful for debugging issues in the application.

Exception codes:

In the crash log is a line that starts with the text Exception Codes: followed by one or more hexadecimal values. These are processor-specific codes that may give more information on the nature of the crash.

 The exception code 0xbaaaaaad indicates that the log is a stackshot of the entire system, not a crash report. To take a stackshot, push the home button and any volume button. Often these logs are accidentally created by users, and do not indicate an error.
The exception code 0xbad22222 indicates that a VoIP application has been terminated by iOS because it resumed too frequently.
 The exception code 0x8badf00d indicates that an application has been terminated by iOS because a watchdog timeout occurred. The application took too long to launch, terminate, or respond to system events.
The exception code 0xc00010ff indicates the app was killed by the operating system in response to a thermal event. This may be due to an issue with the particular device that this crash occurred on, or the environment it was operated in.
The exception code 0xdead10cc indicates that an application has been terminated by iOS because it held on to a system resource (like the address book database) while running in the background.
The exception code 0xdeadfa11 indicated that an application has been force quit by the user. Force quits occur when the user first holds down the On/Off button until "slide to power off" appears, then holds down the Home button. It's reasonable to assume that the user has done this because the application has become unresponsive, but it's not guaranteed - force quit will work on any application.
For detail information Click here