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iOS 测试用代码

//测试图片能否显示-(void)showMyimgview{    UIImageView   *backgroundImg=[[UIImageView alloc]init];    backgroundImg.frame =CGRectMake(50, 200, 200, 100);    backgroundImg.image=[UIImage imageNamed:@"navbar"];    [self.view addSubview:backgroundImg];    [backgroundImg release];}