UIView

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 UIView *v1=[[UIView alloc] initWithFrame:CGRectMake(10, 100, 200, 100)];

    v1.backgroundColor=[UIColor redColor];

    [self.view addSubview:v1];

    UIView *v2=[[UIView alloc] initWithFrame:CGRectMake(50, 150, 200, 100)];

    v2.backgroundColor=[UIColor yellowColor];

    [self.view addSubview:v2];

    UIView *v3=[[UIView alloc] initWithFrame:CGRectMake(100, 200, 200, 100)];

    v3.backgroundColor=[UIColor blueColor];

    [self.view addSubview:v3];

//    [self.view insertSubview:v2 atIndex:0];

//    [self.view insertSubview:v1 aboveSubview:v3];

//    [self.view insertSubview:v2 belowSubview:v1];

//    [self.view exchangeSubviewAtIndex:0 withSubviewAtIndex:2];

    //将一个view放到最下面

    [self.view sendSubviewToBack:v1];

    //将一个view放到最上面

    [self.view bringSubviewToFront:v1];

UIView

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原文地址：http://www.cnblogs.com/wwm881101/p/5462612.html