tabBarItem setBadgeValue 样式自定义(IOS)

-(UIImage*)convertViewToImage:(UIView*)v{
CGSize s = v.bounds.size;
UIGraphicsBeginImageContextWithOptions(s, NO, [UIScreen mainScreen].scale);
[v.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage*image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}

- (UIImage *)combine:(UIImage*)leftImage rightImage:(UIImage*)rightImage {
CGFloat width = leftImage.size.width + 10;
CGFloat height = leftImage.size.height;
CGSize offScreenSize = CGSizeMake(width, height);
UIGraphicsBeginImageContextWithOptions(offScreenSize, NO, 0.0);

CGRect rect = CGRectMake(5, 0, leftImage.size.width, leftImage.size.height);
[leftImage drawInRect:rect];

rect.origin.x += width/2;
[rightImage drawInRect:CGRectMake(leftImage.size.width - 10, 0, rightImage.size.width, rightImage.size.height)];

UIImage* imagez = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return imagez;
}

[xxxx.tabBarItem setFinishedSelectedImage:[self combine:[UIImage imageNamed:@"icon_tabbar_session_select"] rightImage:[self convertViewToImage:_tipView]] withFinishedUnselectedImage:[self combine:[UIImage imageNamed:@"icon_tabbar_session"] rightImage:[self convertViewToImage:_tipView]]];