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我使用此代码,但没有显示出来!!!!?帮助在另一个子视图中添加子视图
CGRect frame = CGRectMake(0.0,0.0,480,320);
secondview=[[UIView alloc] initWithFrame:frame];
[self.view addSubview:secondview];
[self.view bringSubviewToFront:secondview];