iOS将系统tabbar设置为透明

方法：以透明图作为背景

@interface TabbarViewController :UITabBarController

@end

- (void)viewDidLoad {

    [superviewDidLoad];

    self.tabBar.backgroundImage = [selfimageWithColor:[UIColorcolorWithRed:1green:1blue:1alpha:0]];

    

    self.tabBar.shadowImage = [UIImage new];

    

    self.selectedIndex =1 ;

}

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

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

    UIGraphicsBeginImageContext(rect.size);

    CGContextRef context =UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [colorCGColor]);

   CGContextFillRect(context, rect);

    UIImage *image =UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

   return image;

}