iOS 实现状态栏（电池条）和导航条的背景颜色透明

一、此方法可以实现隐藏状态栏，但是整个项目的都会被隐藏掉（不好用）

1.在plist文件中加入   View controller-based status bar appearance 设置为 NO

2.[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:NO];

 

二、亲测好用

 self.automaticallyAdjustsScrollViewInsets =NO;

 UIImage *backImage = [self imageWithColor:[UIColor clearColor]];

[self.navigationController.navigationBar setBackgroundImage:backImage forBarMetrics:UIBarMetricsDefault]; 

[self.navigationController.navigationBar setShadowImage:backImage];

 

#pragma mark Color->IMG

-(UIImage *)imageWithColor:(UIColor *)color {

    CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);

    UIGraphicsBeginImageContext(rect.size);

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [color CGColor]);

    CGContextFillRect(context, rect);

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return image;

}