我是如何实现UIalertView背景色的修改的

转载自：http://www.cocoachina.com/bbs/read.php?tid-11741-toread-1.html

首先声明  ，其实并不是修改背景色，而是在背景上加了个颜色图片，嘿嘿

修改后的效果

2011-11-24更新：

随着sdk的不断更新，这个办法现在已经实效了。
谢谢65楼给出的解决办法，测试了一下，这个办法也只在模拟器上起作用

修改了一下，下面的代码能达到原来的效果
    UIAlertView *theAlert = [[[UIAlertView alloc] initWithTitle:@"Atention"
                                                        message: @"I'm a Chinese!"
                                                       delegate:nil 
                                              cancelButtonTitle:@"Cancel" 
                                              otherButtonTitles:@"Okay",nil] autorelease];
    
    [theAlert show];

    UIView *additonBackgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, alert.frame.size.width-30, alert.frame.size.height-20)];
    additonBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"loveChina.png"]];
#if TARGET_IPHONE_SIMULATOR
    [theAlert insertSubview:additonBackgroundView atIndex:1];
#else
    [theAlert insertSubview:additonBackgroundView atIndex:0];
#endif
        [additonBackgroundView release];