iOS 設置導航欄透明

    //設置導航欄透明
    [self.navigationController.navigationBar setTranslucent:true];
    //把背景設為空
    [self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
    //處理導航欄有條線的問題
    [self.navigationController.navigationBar setShadowImage:[UIImage new]];
//1。
[[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]}];//設置NavigationBar上的title的顏色
//2.
[self.navigationController.navigationBar setTintColor:[UIColor whiteColor]];

//視圖將要出現，隱藏導航欄

 

-(void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];

    [self.navigationController setNavigationBarHidden:YES];

}