UIImageView、UIView、拉伸像素点

UIImageView的动画效果

UIImageView *imaView=[[UIImageView
alloc]init
];

//添加将要播放的图片数组
imaView.animationImages=arr;

//设置播放时间

imaView.animationDuration=1;

//启动动画
[imaView
startAnimating];

图片拉伸像素点

UIImage *bubble = [UIImage
imageWithContentsOfFile:[[NSBundle
mainBundle] pathForResource:@"bubble"
ofType:@"png"]];

UIImageView *bubbleImageView = [[UIImageView
alloc] initWithImage:[bubble
stretchableImageWithLeftCapWidth:21
topCapHeight:14]];

UIView

//将某个视图提到最前面显示

[self.view
bringSubviewToFront:view1];

//将某个视图放到最后面

[self.window
sendSubviewToBack:view1];

// view1是view2的父试图。

//如果子视图的长和宽都要跟着父试图走，那么就按照下面的方法执行

view2.autoresizingMask=UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;

[view1 addSubview:view2];