iOS将系统tabbar设置为透明

20150827105115107.gif

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;
}

感谢:Lw_Chen

http://blog.csdn.net/lw_chen/article/details/48024141