iOS navigationBar的一些知识点

1.更改状态栏颜色

[[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleLightContent];

-(UIStatusBarStyle)preferredStatusBarStyle{
return UIStatusBarStyleLightContent;
}

2.更改背景图片

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

3.更改title的颜色

[self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]}];

4.更改返回箭头颜色

self.navigationController.navigationBar.tintColor = [UIColor whiteColor];