xcode 向圆形矩形按钮添加徽章图标？
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Adding a badge icon to round rect button?
提问by Cherr Skees
Is there a convenient way to make a button with a badge? Not on the icon... I want to do it within the app. A button or an image with a badge selected by the program. Or do I have to build a library of photoshop images?
有没有方便的方法来制作带有徽章的按钮？不在图标上...我想在应用程序中进行。程序选择的带有徽章的按钮或图像。或者我必须建立一个Photoshop图像库吗？
采纳答案by sooper
You'll need to use resizableImageWithCapInsetsto achieve this without a library of photoshop images. There are some great threads (hereand here) that explain its use.
您需要在resizableImageWithCapInsets没有 Photoshop 图像库的情况下使用来实现这一点。有一些很棒的线程（这里和这里）解释了它的用法。
Here's an example I just made to give you an idea:
这是我刚刚给你一个想法的例子：
//Create a label (width/height not important at this stage)
UILabel *yourLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 1, 1)];
yourLabel.text = @"7+";
[yourLabel sizeToFit];
CGRect labelFrame = yourLabel.frame;
//Here we create a UIImage that is resizable, but will not resize the areas concerned with the cap insets you've defined
UIImage *badgeImage = [[UIImage imageNamed:@"badge.png"]resizableImageWithCapInsets:UIEdgeInsetsMake(5, 5, 5, 5)];
UIImageView *badgeImageView = [[UIImageView alloc]initWithImage:badgeImage];
badgeImageView.contentMode = UIViewContentModeScaleToFill;
badgeImageView.backgroundColor = [UIColor clearColor];
labelFrame.size.width += 5; //This is the 'padding' on the right and left (added together)
//If your badge edges are completely circular then you don't want to change the height, but if they're not then go ahead in the same way with the width. If your badge has a static height, you'll need to make sure the font size doesn't exceed this height; better start off with a small font-size
badgeImageView.frame = labelFrame; //The badge is now the right width with padding taken into account
//Center the label on the badge image view
yourLabel.center = CGPointMake(badgeImageView.frame.size.width/2, badgeImageView.frame.size.height/2);
//Finally we add the label to the badge image view
[badgeImageView addSubview:yourLabel];
//Add your badge to the main view
[self.view addSubview:badgeImageView];
[badgeImageView release];
[yourLabel release];
回答by Ilesh P
UILabel *lbl_notification_count = [[UILabel alloc]initWithFrame:CGRectMake(5,0, 18, 18)];
lbl_notification_count.textColor = [UIColor whiteColor];
lbl_notification_count.textAlignment = NSTextAlignmentCenter;
lbl_notification_count.text = [NSString stringWithFormat:@"%d",appDel.NotificationBadge];
lbl_notification_count.adjustsFontSizeToFitWidth=YES;
lbl_notification_count.layer.borderWidth = 1;
lbl_notification_count.layer.cornerRadius = lbl_notification_count.layer.frame.size.height/2;
lbl_notification_count.layer.masksToBounds = YES;
lbl_notification_count.layer.borderColor =[[UIColor colorWithRed:241.0/255.0 green:84.0/255.0 blue:67.0/255.0 alpha:1.0] CGColor];
lbl_notification_count.backgroundColor = [UIColor colorWithRed:241.0/255.0 green:84.0/255.0 blue:67.0/255.0 alpha:1.0];
lbl_notification_count.font = CustomFontMediumWithSize(12);
if (appDel.NotificationBadge >= 1) {
[btnNotification addSubview:lbl_notification_count];
[lbl_notification_count setHidden:NO];
}else{
[lbl_notification_count setHidden:YES];
}
