ios – UITextView中链接的不同样式

Hashtags有特殊条件,这些条件可能超过前面带#的字母数字字符.

twitter文本库将自动为您找到主题标签的范围,然后您应该能够使用TTTAttributedLabel对其进行格式化.

以下是两个库的示例实现.

- (void)scanForHashtag:(NSArray *)hashtags fromLabel:(id)sender
{
    TTTAttributedLabel *label = (TTTAttributedLabel *)sender;

    for (TwitterTextEntity *entity in hashtags) {
        UIFont *boldSystemFont = [UIFont fontWithName:@"Helvetica-Bold" size:12];
        CTFontRef font = CTFontCreateWithName((__bridge CFStringRef)boldSystemFont.fontName,boldSystemFont.pointSize,null);
        NSArray *keys = [[NSArray alloc] initWithObjects:(id)kCTForegroundColorAttributename,(id)kCTUnderlinestyleAttributename,(NSString *)kCTFontAttributename,nil];
        UIColor *hashtagColor;
        hashtagColor = [UIColor greenColor];
        NSArray *objects = [[NSArray alloc] initWithObjects:hashtagColor,[NSnumber numberWithInt:kCTUnderlinestyleNone],(__bridge id)font,nil];
        NSDictionary *linkAttributes = [[NSDictionary alloc] initWithObjects:objects forKeys:keys];
        label.linkAttributes = linkAttributes;

        NSString *hashtag = [label.text subStringWithRange:entity.range];

        if (entity.type == 2) { //Hashtag
            [label addLinkToPhonenumber:hashtag withRange:entity.range];
        } else if (entity.type == 0) { //URL
            NSURL *url = [NSURL URLWithString:[label.text subStringWithRange:entity.range]];
            [label addLinkToURL:url withRange:entity.range];
        }
    }
}

- (void)attributedLabel:(TTTAttributedLabel *)label didSELEctLinkWithPhonenumber:(NSString *)phonenumber
{

    //Do whatever you need when the hashtag is tapped.
}

[self scanForHashtag:[TwitterText hashtagsIntext:@"The text that contains the tweet with hashtags." checkingURLOverlap:NO] fromLabel:yourLabel]; //yourLabel is the label that contains the text so it would be formatted.

编辑UITextView

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:str];
[attributedString addAttribute:NSBACkgroundColorAttributename
                   value:[UIColor yellowColor]
                   range:entity.range];