ios - 随时更改UIStatusBar小技巧

1.设置属性statusBar的样式

  @property (assign, nonatomic) UIStatusBarStyle statusBarStyle;

2.重写系统的属性方法

 - (UIStatusBarStyle)preferredStatusBarStyle
 {
    return self.statusBarStyle;
 }

3.在需要更改颜色的位置对属性statusBarStyle赋值即可,切记要调用[self setNeedsStatusBarAppearanceUpdate]来让控制器刷新状态栏

 self.statusBarStyle = UIStatusBarStyleLightContent;
 [self setNeedsStatusBarAppearanceUpdate];