TTTAttributedLabel 是一个常用的富文本开源库，支持各种属性文本、数据探测器，链接等。
下面我们来看看它的用法。
TTTAttributedLabel 创建：
- (TTTAttributedLabel *)aLable
{
if (!_aLable)
{
_aLable = [[TTTAttributedLabel alloc] initWithFrame:CGRectMake(10, 80, SCREEN_WIDTH - 20, SCREEN_HEIGHT - 200)];
_aLable.backgroundColor = RGBCOLOR(246, 246, 246);
_aLable.lineBreakMode = NSLineBreakByWordWrapping;
_aLable.numberOfLines = 0;
_aLable.delegate = self;
_aLable.lineSpacing = 10;
//要放在`text`, with either `setText:` or `setText:afterInheritingLabelAttributesAndConfiguringWithBlock:前面才有效
_aLable.enabledTextCheckingTypes = NSTextCheckingTypePhoneNumber|NSTextCheckingTypeAddress|NSTextCheckingTypeLink;
//链接正常状态文本属性
_aLable.linkAttributes = @{NSForegroundColorAttributeName:[UIColor purpleColor],NSUnderlineStyleAttributeName:@(1)};
//链接高亮状态文本属性
_aLable.activeLinkAttributes = @{NSForegroundColorAttributeName:[UIColor blackColor],NSUnderlineStyleAttributeName:@(1)};
}
return _aLable;
}
注：enabledTextCheckingTypes要放在text, with either setText: or setText:afterInheritingLabelAttributesAndConfiguringWithBlock:前面才有效.
文本赋值
NSString *text = DaoXiang;
__block CGSize size;
[self.aLable setText:text afterInheritingLabelAttributesAndConfiguringWithBlock:^NSMutableAttributedString *(NSMutableAttributedString *mutableAttributedString) {
NSRange fontRange = [[mutableAttributedString string] rangeOfString:@"对这个世界如果你有太多的抱怨"
options:NSCaseInsensitiveSearch];
NSRange strokeColorRange1 = [[mutableAttributedString string] rangeOfString:@"跌倒了 就不敢继续往前走"
options:NSCaseInsensitiveSearch];
NSRange strikeRange = [[mutableAttributedString string] rangeOfString:@"为什麼 人要这麼的脆弱 堕落"
options:NSCaseInsensitiveSearch];
NSRange fillColorRange = [[mutableAttributedString string] rangeOfString:@"请你打开电视看看"
options:NSCaseInsensitiveSearch];
NSRange shadowRange = [[mutableAttributedString string] rangeOfString:@"为生命在努力勇敢的走下去"
options:NSCaseInsensitiveSearch];
NSRange obliquenessRange = [[mutableAttributedString string] rangeOfString:@"还记得你说家是唯一的城堡"
options:NSCaseInsensitiveSearch];
UIEdgeInsets fillPadding = UIEdgeInsetsMake(0, 0, 0, 0);
// Core Text APIs use C functions without a direct bridge to UIFont. See Apple's "Core Text Programming Guide" to learn how to configure string attributes.
UIFont *boldSystemFont = [UIFont boldSystemFontOfSize:16];
CTFontRef font = CTFontCreateWithName((__bridge CFStringRef)boldSystemFont.fontName, boldSystemFont.pointSize, NULL);
if (font) {
{
//字体
[mutableAttributedString addAttribute:(NSString *)kCTFontAttributeName
value:(__bridge id)font
range:fontRange];
//文字颜色
[mutableAttributedString addAttribute:(NSString *)kCTForegroundColorAttributeName
value:[UIColor redColor]
range:fontRange];
CFRelease(font);
}
{
//NSStrokeColorAttributeName设置文字描边颜色，需要和NSStrokeWidthAttributeName设置描边宽度，这样就能使文字空心
//文字描边颜色
[mutableAttributedString addAttribute:NSStrokeColorAttributeName
value:[UIColor blueColor]
range:strokeColorRange1];
//文字描边宽度
[mutableAttributedString addAttribute:NSStrokeWidthAttributeName
value:@(2.0)
range:strokeColorRange1];
}
{
//删除样式
[mutableAttributedString addAttribute:kTTTStrikeOutAttributeName
value:@YES
range:strikeRange];
//加上下划线
[mutableAttributedString addAttribute:NSUnderlineStyleAttributeName
value:[NSNumber numberWithInt:3]
range:strikeRange];
[mutableAttributedString addAttribute:NSUnderlineColorAttributeName
value:[UIColor greenColor]
range:strikeRange];
}
{
//背景色
[mutableAttributedString addAttribute:kTTTBackgroundFillColorAttributeName
value:[UIColor purpleColor]
range:fillColorRange];
//控制背景色范围
[mutableAttributedString addAttribute:kTTTBackgroundFillPaddingAttributeName
value:[NSNumber valueWithUIEdgeInsets:fillPadding]
range:fillColorRange];
//控制背景色（文字边框）的圆角
[mutableAttributedString addAttribute:kTTTBackgroundCornerRadiusAttributeName
value:@(4)
range:fillColorRange];
//文字边框颜色
[mutableAttributedString addAttribute:kTTTBackgroundStrokeColorAttributeName
value:[UIColor purpleColor]
range:fillColorRange];
}
{
//无效
NSShadow *shadow = [[NSShadow alloc] init];
[shadow setShadowColor:[UIColor redColor]];
[shadow setShadowBlurRadius:4.0];
[shadow setShadowOffset:CGSizeMake(2, 2)];
//阴影
[mutableAttributedString addAttribute:NSShadowAttributeName
value:shadow
range:shadowRange];
}
{
//无效
//斜体
//NSObliquenessAttributeName 设置字体倾斜度，取值为 NSNumber（float），正值右倾，负值左倾
[mutableAttributedString addAttribute:NSObliquenessAttributeName
value:@(5.0)
range:obliquenessRange];
}
}
//高度计算
size = [TTTAttributedLabel sizeThatFitsAttributedString:mutableAttributedString
withConstraints:CGSizeMake(SCREEN_WIDTH - 20, CGFLOAT_MAX)
limitedToNumberOfLines:0];
return mutableAttributedString;
}];
NSRange boldRange1 = [text rangeOfString:@"随著稻香河流继续奔跑" options:NSCaseInsensitiveSearch];
[self.aLable addLinkToURL:[NSURL URLWithString:@"http://y.qq.com/portal/song/003aAYrm3GE0Ac.html"]
withRange:boldRange1];
//电话号码可以自动识别，也可以这样添加
// NSRange phoneRange = [text rangeOfString:phoneNum options:NSCaseInsensitiveSearch];
// [self.aLable addLinkToPhoneNumber:phoneNum withRange:phoneRange];
NSRange addressRange = [text rangeOfString:@"微微笑 小时候的梦我知道" options:NSCaseInsensitiveSearch];
[self.aLable addLinkToAddress:@{@"detailAdd":@"幸福街122号",@"lontitude":@"110.011111",@"latitude":@"30.1234"}
withRange:addressRange];
self.aLable.frame = CGRectMake(10, 0, SCREEN_WIDTH - 20, size.height);
[self addSubview:self.aLable];
点击链接代理TTTAttributedLabelDelegate
数据探测器会自动探测到链接，邮件地址等。下面代理，就可以实现点击链接的回调。
#pragma mark - TTTAttributedLabelDelegate
- (void)attributedLabel:(TTTAttributedLabel *)label didSelectLinkWithURL:(NSURL *)url
{
NSLog(@"linkClick");
[[UIApplication sharedApplication] openURL:url];
}
- (void)attributedLabel:(TTTAttributedLabel *)label didSelectLinkWithAddress:(NSDictionary *)addressComponents
{
NSLog(@"addressClick");
NSLog(@"detailAdd:%@,lontitude:%f,latitude:%f",addressComponents[@"detailAdd"],
[addressComponents[@"lontitude"] floatValue],
[addressComponents[@"latitude"] floatValue]);
}
- (void)attributedLabel:(TTTAttributedLabel *)label
didSelectLinkWithPhoneNumber:(NSString *)phoneNumber
{
NSLog(@"phoneClick");
NSString *num = [NSString stringWithFormat:@"tel:%@",phoneNumber];
// NSString *num = [NSString stringWithFormat:@"telprompt://%@",number];
//而这个方法则打电话前先弹框 是否打电话 然后打完电话之后回到程序中 网上说这个方法可能不合法 无法通过审核
UIApplication *application = [UIApplication sharedApplication];
AppDelegate *delegate = (AppDelegate *)application.delegate;
UIWindow *window = delegate.window;
UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil
message:[NSString stringWithFormat:@"是否拨打 %@",phoneNumber]
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *actionCancel = [UIAlertAction actionWithTitle:@"取消"
style:UIAlertActionStyleCancel
handler:^(UIAlertAction * _Nonnull action) {}];
UIAlertAction *actionDone = [UIAlertAction actionWithTitle:@"确定"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * _Nonnull action) {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:num]]; //拨号
}];
[alert addAction:actionCancel];
[alert addAction:actionDone];
[window.rootViewController presentViewController:alert animated:YES completion:nil];
}
上一篇《YYText 库学习总结》简单介绍了YYText的用法，下面做一个对比：
功能|YYLabel|YYTextView| TTTAttributedLabel|备注
:---:|:---:|:---:|:---:
字体|✔️|✔️|✔️|
颜色|✔️|✔️|✔️|
描边|✔️|✔️|✔️|
删除样式|✔️|✔️|✔️|
下划线|✔️|✔️|✔️|
背景色|✔️|✔️|✔️|
阴影|✔️|✔️|❌|
斜体|❌|❌|❌|
图片|✔️|✔️|❌|TTT不支持
链接|✔️|✔️|✔️|
数据探测器|❌|✔️|✔️|
注：数据探测器即自动检测链接，电话，邮箱，地址等。
