ios成长之路UIView

  view旋转
    CGAffineTransform at =CGAffineTransformMakeRotation(M_PI/2);   //先顺时钟旋转90
    at =CGAffineTransformTranslate(at,200,0);
    [self.benview setTransform:at];
   
    view缩小
    UIView *tonguoview = [[UIView alloc] initWithFrame:CGRectMake(0,100,349,190)];
    tonguoview.clipsToBounds = YES;
    tonguoview.layer.cornerRadius = 5;
    tonguoview.backgroundColor = [UIColor blackColor];
    [self.view addSubview:tonguoview];

//    创建一个view
    UIView *seview=[[UIView alloc]initWithFrame:CGRectMake(0,90,10,10)];
//    短片界限
    seview.clipsToBounds = YES;
//    圆弧角
    seview.layer.cornerRadius = 1;
//    背景色
    seview.backgroundColor = [UIColor redColor];
//    让这个view显示
    [self  addSubview:seview];