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