ios 7 状态栏的处理

if ([[[UIDevice currentDevice] systemVersion] floatValue]>=7) {
        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
        self.window.frame=CGRectMake(0, 20, self.window.frame.size.width, self.window.frame.size.height-20);
    }

info.plist加入
View controller-based status bar appearance 设为NO