ios 设置背景图片

设置背景图片

    UIImageView* backgroundImage = [[UIImageView alloc]initWithImage:[UIImage imageNamed: @"bg.png"]];
    backgroundImage.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
    [self.view addSubview:backgroundImage];
    [self.view sendSubviewToBack:backgroundImage];
    [backgroundImage release];

或者

    UIImageView* backgroundImage = [[UIImageView alloc]initWithImage:[UIImage imageNamed: @"bg.png"]];
    backgroundImage.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
    [self.view insertSubview:backgroundImage atIndex:0];
    [backgroundImage release];

另：addSubview:和insertSubview:anIndex:的区别

　　addSubview：是加到最后
　　insertSubview：atIndex：是加到指定的位置

　　addSubview 是将view加到所有层的最顶层，相当于将insertSubview的atIndex参数设置成view.subviews count

　　即

　　　　[view addSubview:oneview] == [view insertSubview:oneview atIndex:view.subviews count]