* 給導航條加陰影if ([self.navigationBar respondsToSelector:@selector(setBackgroundImage:forBarMetrics:)]){
今天在把iOS工程從一臺機器拷貝到一臺新機器（未裝cocoaPod）時遇到了如下的問題。YuandeMacBook-Pro:ProjectDirectory user$ pod updateUpdat
