UIView *redView=[[UIView alloc]initWithFrame:CGRectMake(0,20,200,200)];
redView.backgroundColor=[UIColor redColor];
//允许子视图放大或缩小 默认autoresizeSubviews的就为YES
redView.autoresizeSubview=YES;
redView.tag=100;
[self.window addSubview:redView];
UIView *yellowView=[[UIView alloc]initWithFrame:CGRectMake(0,0,100,100)];
//按照可缩放的高度进行放大或缩小
yellowView.autoresizingMask=UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexbleWidth;
yellowView.backgroundColor=[UIColor yellowColor];
[redView addSubview:yellowView];
UIButton *btn=[UIButton buttonWithType:UIButtonTypeSystem];
[btn setTitle:@"放大" forState:UIControlStateNormal];
btn.frame=CGRectMake(100,300,100,30);
[self.window addSubview:btn];
[btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
-(void)btnClick:(UIButton *)bt
{
UIView *redView=[self.window viewWithTag:100];
redView.frame=CGRectMake(redView.frame.origin.x,redView.frame.origin.y,redView.frame.size.width+10,redView.frame.size.height+10);
}
//GIF 用第三方库
(1)
//获得图片路径
NSString *imgPath=[[NSBundle mainBundle]pathForResource:@"FlagZombie" ofType:@"gif"];
//通过指定路径下的文件初始化NSData
NSData *data=[[NSData alloc]initWithContentOfFile:imgPath];
UIImageView *imgView=[[UIImageView alloc]initWithFrame:CGRectMake(100,100,50,50)];
imgView.image=[UIImage animatedImageWithAnimatedGIFData:data];
[self.window addSubview:imgView];
(2)
NSURL *url=[[NSBundle mainBundle]URLForResource:@"FlagZombie" withExtension:@"gif"];
UIImageView *imgView=[[UIImageView alloc]initWithFrame:CGRectMake(200,100,80,80)];
//通过类别中的方法animatedImageWithAnimatedGIFURL实现Gif的图片的播放
imgView.imge=[UIImage animatedImageWithAnimatedGIFURL:url];
imgView.tag=100;
[self.window addSubview:imgView];
//通过定时器实现每一段时间调用move方法
[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(move) userInfo:nil repeats:YES];
-(void)move{
UIImageView *imgView=(UIImageView *)[self.window viewWithTag:100];
//当图片的x坐标大于80,没调用move都使图片向左侧偏移5个单位
if(imgView.frame.origin.x>80){
imgView.frame=CGRectMake(imgView.frame.origin.x-5,imgView.frame.origin.y,imgView.frame.size.width,imgView.frame.size.height);
}
}