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UILabel *showLabel = [[UILabel alloc]init];
showLabel.backgroundColor = [UIColor redColor];
[self.navigationController.view insertSubview:showLabel belowSubview:self.navigationController.navigationBar];
要把一个控件隐藏在navigationBar后面伺机而动怎么办
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原文地址:http://www.cnblogs.com/yintingting/p/4551500.html