在viewDidLoad函數(shù)里寫上

//自定義導航欄顏色

[self.navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:50/255.0 green:147/255.0 blue:209/255.0 alpha:1]];

//自定義導航欄背景圖片

[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"bg_banner10.png"] forBarMetrics:UIBarMetricsDefault];

//修改導航欄標題字體大小和顏色

[self.navigationController.navigationBar setTitleTextAttributes:@{

NSFontAttributeName:[UIFont systemFontOfSize:19],

NSForegroundColorAttributeName:[UIColor whiteColor]

}];