解決屏幕留白問題

self.automaticallyAdjustsScrollViewInsets = NO;//解決頂部留有空白的情況

改變狀態(tài)欄顏色

- (UIStatusBarStyle)preferredStatusBarStyle {
    
    return UIStatusBarStyleLightContent;//狀態(tài)欄顏色變?yōu)榘咨?    
}

隱藏導航欄返回鍵

[self.navigationController.navigationItem setHidesBackButton:YES];
    [self.navigationItem setHidesBackButton:YES];
    [self.navigationController.navigationBar.backItem setHidesBackButton:YES];```