自定义状态栏

让状态栏上的文字变为变色，先在supporting files 里的plist文件中加一个ViewController－based status bar appearance 设为NO;

UIView * view1 = [[UIView
alloc]initWithFrame:CGRectMake(0,
0, self.view.frame.size.width,
20)];

view1.backgroundColor = [UIColor
redColor];

[self.view
addSubview:view1];

[[UIApplication
sharedApplication]setStatusBarStyle:UIStatusBarStyleLightContent];