navigationBar及Tabbar相關

//按鈕的顏色
 [self.navigationBar setTintColor:[UIColor whiteColor]];

 //標題顏色
[self.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor],NSFontAttributeName:[UIFont systemFontOfSize:16]}];

 //背景顏色
 self.navigationBar.barTintColor = [UIcolor red];

```
//  隱藏導航欄的返回鍵
self.navigationItem.hidesBackButton = YES;
self.navigationItem.leftBarButtonItem = nil;