iOS 第三方控件GIFView的学习记录

之前的项目代码里用到了关于gif的显示,现在特别记录一下

效果:

代码

GifView.h

#import 
#import 

@interface GifView : UIView {
	CGImageSourceRef gif; // 保存gif动画
	NSDictionary *gifProperties; // 保存gif动画属性
	size_t index; // gif动画播放开始的帧序号
	size_t count; // gif动画的总帧数
	NSTimer *timer; // 播放gif动画所使用的timer
}

- (id)initWithFrame:(CGRect)frame filePath:(NSString *)_filePath;
- (id)initWithFrame:(CGRect)frame data:(NSData *)_data;
- (void)loadData:(NSData *)_data;
- (id)initWithFrame:(CGRect)frame;

@end

- (id)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
        
    }
    return self;
}

-(void)loadData:(NSData *)_data{
    
    //kCGImagePropertyGIFLoopCount loopCount（播放次数）：有些gif播放到一定次数就停止了，如果为0就代表gif一直循环播放。
    gifProperties = [[NSDictionary dictionaryWithObject:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:0] forKey:(NSString *)kCGImagePropertyGIFLoopCount] forKey:(NSString *)kCGImagePropertyGIFDictionary] retain];
  
    
    gif = CGImageSourceCreateWithData((CFDataRef)_data, (CFDictionaryRef)gifProperties);
    
    count =CGImageSourceGetCount(gif);
    
    //获取图像的属性信息
    NSDictionary* frame1Properties = ( NSDictionary*)CGImageSourceCopyPropertiesAtIndex(gif, 0, NULL);
    
    //kCGImagePropertyGIFDelayTime 每一帧播放的时间，也就是说这帧显示到delayTime就转到下一帧。
    float duration = [[[frame1Properties objectForKey:(NSString*)kCGImagePropertyGIFDictionary] objectForKey:(NSString*)kCGImagePropertyGIFDelayTime] floatValue];
    
    //解决重复调用timer的问题
    if (timer)
    {
        [timer invalidate];
        timer = nil;
    }
    
    timer = [NSTimer scheduledTimerWithTimeInterval:duration target:self selector:@selector(play) userInfo:nil repeats:YES];
    [timer fire];
}

-(void)play
{
    index ++;
    index = index%count;
    
    //获取图像
	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];
}

#import 
#import "GifView.h"


@interface GifCell : UITableViewCell
{
    
    GifView *showGifView;
    
}

- (void)loadData:(NSData *)data;

#import "GifCell.h"

@implementation GifCell

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        [self performSelector:@selector(makeCell)];
    }
    return self;
}


- (void)makeCell{
    self.selectionStyle = UITableViewCellSelectionStyleNone;
    self.contentView.backgroundColor = RGBCOLOR(215, 219, 220);
    UIView *headView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 55, 50)];
    headView.backgroundColor = RGBCOLOR(213, 214, 216);
    [self.contentView addSubview:headView];
    
    UIView *lineView = [[UIView alloc]initWithFrame:CGRectMake(55, 0, 1, 50)];
    lineView.backgroundColor = RGBCOLOR(188, 190, 189);
    [self.contentView addSubview:lineView];
    
    UIImageView *imageRound = [[UIImageView alloc]initWithFrame:CGRectMake(14, 12, 28, 28)];
    imageRound.image = [UIImage imageNamed:@"radiobutton_off_background"];
    [headView addSubview:imageRound];
    
    
    
    showGifView =[[GifView alloc] initWithFrame:CGRectMake(65, 5, 300, 40) ];
    showGifView.contentMode = UIViewContentModeScaleAspectFit;
    [self.contentView addSubview:showGifView];
    

}


- (void)loadData:(NSData *)data{
    [showGifView loadData:data];
}


- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
    [super setSelected:selected animated:animated];
    
    // Configure the view for the selected state
}

#import "GifCell.h"
#import "ViewController.h"
#import "GifView.h"
@interface ViewController ()

@property (nonatomic, strong)NSMutableArray *dataArr;
@property (nonatomic, strong)UITableView *myTableView;

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	
    self.dataArr = [[NSMutableArray alloc]initWithCapacity:0];
    
    for (int i = 0 ; i<10 ; i++) {
        NSString *dataPath = [[NSBundle mainBundle]pathForResource:[NSString stringWithFormat:@"%d",i+1] ofType:@"gif"];
        NSData *data = [[NSData alloc]initWithContentsOfFile:dataPath];
        [self.dataArr addObject:data];
    }
    
    self.myTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 50, 320, 300) style:UITableViewStylePlain];
    self.myTableView.delegate = self;
    self.myTableView.dataSource = self;
    [self.view addSubview:self.myTableView];
    
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section   {
    return self.dataArr.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    GifCell *cell = [tableView dequeueReusableCellWithIdentifier:@"id"];
    
    if (!cell) {
        cell = [[GifCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"id"];
    }
    
    [cell loadData:[self.dataArr objectAtIndex:indexPath.row]];
    
    return cell;
}

源码:GIFViewDemo