UIImageView animationImages内存问题

 UIImageView做帧动画内存问题，内存消耗太大。如果使用gif格式图片，会降低内存消耗，可是图片失真。今从网上看到一个帖子有更好方法解决，特意转载。

简单UIImageView animationImages

 
     
     imagesArray = [NSArray arrayWithObjects:
 
     
                 [UIImage imageNamed:@"image1.png"],
 
     
                 [UIImage imageNamed:@"image2.png"],
 
     
                 [UIImage imageNamed:@"image3.png"],
 
     
                 [UIImage imageNamed:@"image4.png"],
 
     
                 [UIImage imageNamed:@"image5.png"],nil];
 
     
     animationImageView = [UIImageView alloc];
 
     
     [animationImageView initWithFrame:CGRectMake(0, 0, 131, 125)];
 
     
     animationImageView.animationImages = imagesArray;//将序列帧数组赋给UIImageView的animationImages属性
 
     
     animationImageView.animationDuration = 0.25;//设置动画时间
 
     
     animationImageView.animationRepeatCount = 0;//设置动画次数 0 表示无限
 
     
     [animationImageView startAnimating];//开始播放动画
 
     
     [self addSubview:animationImageView];

– startAnimating启动动画
– stopAnimating停止动画

– isAnimating判断是否在动画执行过程中

缺点是使用UIImageView不能暂停播放。

 

思路：动态加载图片，不要把图片一下全部加在进去。

 
     
     imgV=[[UIImageView alloc]initWithFrame:CGRectMake(40, 40, 128, 128)];
 
     
     [self.window addSubview:imgV];
 
     
     [self performSelectorInBackground:@selector(playAnim)withObject:nil];
 
     
     [imgV release];

 
     
     -(void)playAnim{
 
     
         for (int i=0;i<101;){
 
     
         usleep(100000);
 
     
         UIImage *image=[[UIImage alloc]initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%d",i+1 ] ofType:@"tiff"]];
 
     
        [self performSelectorOnMainThread:@selector(changeImage:) withObject:image waitUntilDone:YES];
 
     
        i++;
 
     
        }
 
     
     }

 
     
     -(void)changeImage:(UIImage*)image{
 
     
        imgV.image=image;
 
     
     }