话不多说，直接看示例代码
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```// UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, kScreenW, tabBarHeight + 5)];// [imageView setImage:[self createImageWithColor:[UIColor clearColor]]];// [imageView setContentMode:UIViewContentModeScaleToFill];// [self.tabBar insertSubview:imageView atIndex:0]; //覆盖原生Tabbar的上横线// [[UITabBar appearance] setShadowImage:[self createImageWithColor:[UIColor clearColor]]];//背景图片为透明色// [[UITabBar appearance] setBackgroundImage:[self createImageWithColor:[UIColor clearColor]]]; self.tabBar.backgroundColor = [UIColor clearColor];//设置为半透明 self.tabBarController.tabBar.translucent = YES;``````-(UIImage*) createImageWithColor:(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 *theImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return theImage;}``` |
