ios - 将收件人显示为 UIButton

Question

类似于iPhone 邮件，我想将收件人显示为UIButton。但我无法正确实现它。
我在单个 UILabel 上创建所有收件人，然后为其分配属性文本。

NSMutableArray *arrRecipients = [NSMutableArray new];

if([message.Recipients containsString:@", "])
{
    NSArray *arr = [message.Recipients componentsSeparatedByString:@", "];

    for(int i = 0; i < arr.count; i++)
    {
        [arrRecipients addObject:[arr objectAtIndex:i]];
    }
}
else
{
    [arrRecipients addObject:message.Recipients];
}

NSString *recipientString = @"";

for(int i = 0; i < arrRecipients.count; i++)
{
    if([recipientString isEqual:@""])
        recipientString = [arrRecipients objectAtIndex:i];
    else
        recipientString = [recipientString stringByAppendingString:[NSString stringWithFormat:@" %@", [arrRecipients objectAtIndex:i]]];

}

NSMutableAttributedString *str = [[NSMutableAttributedString alloc]initWithString:[NSString stringWithFormat:@"%@: %@", NSLocalizedString(@"to", nil), recipientString]];

for(NSString *value in arrRecipients)
{
    NSRange range = [recipientString rangeOfString:value];
    [str addAttribute:NSBackgroundColorAttributeName value:[UIColor colorWithRed:205.0/255.0 green:205.0/255.0 blue:205.0/255.0 alpha:1.0] range:NSMakeRange(range.location + 4, range.length)];
}

UILabel *recipients = [[UILabel alloc]initWithFrame:CGRectMake(5, subject.frame.origin.y + subject.frame.size.height + 6, viewHeader.frame.size.width - 5, 20)];
recipients.attributedText = str;
recipients.numberOfLines = 0;
recipients.font = [UIFont systemFontOfSize:14];
[viewHeader addSubview:recipients];
[recipients sizeToFit];

[viewHeader sizeToFit];  

结果:

不是很好。

我怎样才能改进它？

Answer 1

您应该将 UITextView 与属性字符串键 NSLinkAttributeName 一起使用，并使用其各自的 UITextView 委托(delegate)处理每个名称的点击。

NSMutableAttributedString *str = [[NSMutableAttributedString alloc]initWithString:[NSString stringWithFormat:@"%@: %@", NSLocalizedString(@"to", nil), recipientString]];

for(NSString *value in arrRecipients)
{
    NSRange range = [recipientString rangeOfString:value];
    [str addAttribute:NSBackgroundColorAttributeName value:[UIColor colorWithRed:205.0/255.0 green:205.0/255.0 blue:205.0/255.0 alpha:1.0] range:NSMakeRange(range.location + 4, range.length)];
    [str addAttribute: NSLinkAttributeName value:"a custom url scheme" range:NSMakeRange(range.location + 4, range.length)];

}

然后在这个方法中处理:

- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange
{
   if ([[URL scheme] isEqualToString:@"myurl"]) {
       // Handle tap

       return NO;
   }

   return YES;
}