解决屏幕留白问题
self.automaticallyAdjustsScrollViewInsets = NO;//解决顶部留有空白的情况
改变状态栏颜色
- (UIStatusBarStyle)preferredStatusBarStyle {
return UIStatusBarStyleLightContent;//状态栏颜色变为白色
}
隐藏导航栏返回键
[self.navigationController.navigationItem setHidesBackButton:YES];
[self.navigationItem setHidesBackButton:YES];
[self.navigationController.navigationBar.backItem setHidesBackButton:YES];```