//将状态栏文字颜色变成黑色

-(void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    if (is_IOS_7) {//更改时间颜色
        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:NO];
    }
}
 
-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
     
    if (is_IOS_7) {//更改时间颜色
        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];
    }
}