Two ways for iOS to load dynamic graphs

Two ways for iOS to load dynamic graphs

I

 

View = [[UIView alloc] initWithFrame: CGRectMake (0, 0,100,100)];

NSString * imagePath = [[NSBundle mainBundle] pathForResource: @ "csjg" ofType: @ "gif"];

CGImageSourceRef cImageSource = CGImageSourceCreateWithURL (_ bridge CFURLRef) [NSURL fileURLWithPath: imagePath], NULL );

Size_t imageCount = CGImageSourceGetCount (cImageSource );

NSMutableArray * images = [[NSMutableArray alloc] initWithCapacity: imageCount];

NSMutableArray * times = [[NSMutableArray alloc] initWithCapacity: imageCount];

NSMutableArray * keyTimes = [[NSMutableArray alloc] initWithCapacity: imageCount];

Float totalTime = 0;

For (size_t I = 0; I <imageCount; I ++ ){

CGImageRef cgimage = CGImageSourceCreateImageAtIndex (cImageSource, I, NULL );

[Images addObject :( _ bridge id) cgimage];

CGImageRelease (cgimage );

 

NSDictionary * properties = (_ bridge NSDictionary *) CGImageSourceCopyPropertiesAtIndex (cImageSource, I, NULL );

NSDictionary * gifProperties = [properties valueForKey :( _ bridge NSString *) kCGImagePropertyGIFDictionary];

NSString * gifDelayTime = [gifProperties valueForKey :( _ bridge NSString *) kCGImagePropertyGIFDelayTime];

[Times addObject: gifDelayTime];

TotalTime + = [gifDelayTime floatValue];

// _ Size. width = [[properties valueForKey :( NSString *) kCGImagePropertyPixelWidth] floatValue];

// _ Size. height = [[properties valueForKey :( NSString *) kCGImagePropertyPixelHeight] floatValue];

}

 

Float currentTime = 0;

For (size_t I = 0; I <times. count; I ++ ){

Float keyTime = currentTime/totalTime;

[KeyTimes addObject: [NSNumber numberWithFloat: keyTime];

CurrentTime + = [[times objectAtIndex: I] floatValue];

}

 

CAKeyframeAnimation * animation = [CAKeyframeAnimation animationWithKeyPath: @ "contents"];

[Animation setTimingFunction: [CAMediaTimingFunction functionWithName: kCAMediaTimingFunctionLinear];

[Animation setValues: images];

[Animation setKeyTimes: keyTimes];

Animation. duration = totalTime;

Animation. repeatCount = HUGE_VALF;

[View. layer addAnimation: animation forKey: @ "gifAnimation"];

 

II

 

//

// GifView. h

// GIFViewer

//

// Created by xToucher04 on 11-11-9.

// Copyright 2011 Toucher. All rights reserved.

//

 

# Import

# Import

 

@ Interface GifView: UIView {

CGImageSourceRef gif;

NSDictionary * gifProperties;

Size_t index;

Size_t count;

Nstmer * timer;

}

 

-(Id) initWithFrame :( CGRect) frame filePath :( NSString *) _ filePath;

-(Id) initWithFrame :( CGRect) frame data :( NSData *) _ data;

 

@ End

 

 

//

// GifView. m

// GIFViewer

//

// Created by xToucher04 on 11-11-9.

// Copyright 2011 Toucher. All rights reserved.

//

 

# Import "GifView. h"

# Import

 

@ Implementation GifView

 

 

-(Id) initWithFrame :( CGRect) frame filePath :( NSString *) _ filePath {

 

Self = [super initWithFrame: frame];

If (self ){

 

GifProperties = [[NSDictionary dictionaryWithObject: [NSDictionary dictionaryWithObject: [NSNumber numberWithInt: 0] forKey :( NSString *) kCGImagePropertyGIFLoopCount]

ForKey :( NSString *) kCGImagePropertyGIFDictionary] retain];

Gif = CGImageSourceCreateWithURL (CFURLRef) [NSURL fileURLWithPath: _ filePath], (CFDictionaryRef) gifProperties );

Count = CGImageSourceGetCount (gif );

Timer = [NSTimer scheduledTimerWithTimeInterval: 0.12 target: self selector: @ selector (play) userInfo: nil repeats: YES];

[Timer fire];

}

Return self;

}

 

-(Id) initWithFrame :( CGRect) frame data :( NSData *) _ data {

 

Self = [super initWithFrame: frame];

If (self ){

 

GifProperties = [[NSDictionary dictionaryWithObject: [NSDictionary dictionaryWithObject: [NSNumber numberWithInt: 0] forKey :( NSString *) kCGImagePropertyGIFLoopCount]

ForKey :( NSString *) kCGImagePropertyGIFDictionary] retain];

// Gif = CGImageSourceCreateWithURL (CFURLRef) [NSURL fileURLWithPath: _ filePath], (CFDictionaryRef) gifProperties );

Gif = CGImageSourceCreateWithData (CFDataRef) _ data, (CFDictionaryRef) gifProperties );

Count = CGImageSourceGetCount (gif );

Timer = [NSTimer scheduledTimerWithTimeInterval: 0.5 target: self selector: @ selector (play) userInfo: nil repeats: YES];

[Timer fire];

}

Return self;

}

 

-(Void) play

{

Index ++;

Index = index % count;

CGImageRef ref = CGImageSourceCreateImageAtIndex (gif, index, (CFDictionaryRef) gifProperties );

Self. layer. contents = (id) ref;

CFRelease (ref );

}

-(Void) removeFromSuperview

{

NSLog (@ "removeFromSuperview ");

[Timer invalidate];

Timer = nil;

[Super removeFromSuperview];

}

-(Void) dealloc {

NSLog (@ "dealloc ");

CFRelease (gif );

[GifProperties release];

[Super dealloc];

}

@ End

When using:

GifView * pathView = [[GifView alloc] initWithFrame: CGRectMake (100, 0,100,100) filePath: [[NSBundle mainBundle] pathForResource: @ "csjg" ofType: @ "gif"];