UITextView使用与YYlabel使用比较

UITextView使用

- (UITextView*)contentTextView {if (!_contentTextView) {_contentTextView = [[UITextView alloc] init];_contentTextView.textAlignment = NSTextAlignmentLeft;_contentTextView.delegate = self;// 必须禁止输入，否则点击将弹出输入键盘_contentTextView.editable = NO;_contentTextView.scrollEnabled = NO;_contentTextView.backgroundColor = [UIColor clearColor];_contentTextView.showsVerticalScrollIndicator = NO;_contentTextView.showsHorizontalScrollIndicator = NO;_contentTextView.contentInset = UIEdgeInsetsZero;_contentTextView.scrollIndicatorInsets = UIEdgeInsetsZero;_contentTextView.contentOffset = CGPointZero;_contentTextView.textContainerInset = UIEdgeInsetsZero;_contentTextView.textContainer.lineFragmentPadding = 0;}return _contentTextView;
}

textView赋值：
当文本内容里有链接需要点击跳转时：

NSString*string =@"自定义"]；NSMutableAttributedString* mutAttributedString = [[NSMutableAttributedString alloc]initWithString:stringattributes:@{NSFontAttributeName : IS_FONT(15),NSForegroundColorAttributeName : IS_COLOR_HEX(@"#202020")}];NSString* channelString = @"去频道";[mutAttributedStringappendAttributedString:[[NSAttributedString alloc]initWithString:channelStringattributes:@{NSFontAttributeName : IS_FONT(15)}]];NSRange channelRange =[mutAttributedString.string rangeOfString:channelString];NSString* channelUrlString = [NSStringstringWithFormat:@"channel://%@", self.experienceModel.idString];[mutAttributedString addAttribute:NSLinkAttributeNamevalue:channelUrlStringrange:channelRange];// 解析文本内链接[self analyseUrlWithContentString:mutAttributedString];contentTextView.attributedText =mutAttributedString;

textView代理方法

#pragma mark--- protocolTextView-UITextViewdelegate
- (BOOL)textView:(UITextView*)textViewshouldInteractWithURL:(NSURL*)URLinRange:(NSRange)characterRange {if ([[URL scheme] isEqualToString:@"channel"]) {NSString* channelIdString =[NSString stringWithFormat:@"%@", URL.absoluteString];channelIdString =[channelIdString stringByReplacingOccurrencesOfString:@"channel://"withString:@""];// 物品赠送反馈系统消息类型----去频道// [self pushTalkViewWithChannelShowId:channelIdString];} else {// 文本内链接识别跳转// 解码NSString* requestString =[URL.absoluteString stringByRemovingPercentEncoding];if (requestString && requestString.length > 0) {// [self pushTalkViewWithUrlString:[NSString//                                     stringWithFormat:@"%@",//        URL.absoluteString]];}}return NO;
}

解析UITextView字符串里的链接并改成图片文本

#pragma mark-- 递归解析纯文本的链接
- (void)analyseTextViewUrlWithContentString:(NSMutableAttributedString*)attributedStr {NSError* error = nil;NSString* regulaStr =@"((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/"@"[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/"@"=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/"@"[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)";NSRegularExpression* regex = [NSRegularExpressionregularExpressionWithPattern:regulaStroptions:NSRegularExpressionCaseInsensitiveerror:&error];NSArray* arrayOfAllMatches =[regex matchesInString:attributedStr.stringoptions:0range:NSMakeRange(0, attributedStr.string.length)];// 替换链接为汉字-"网页链接"NSMutableAttributedString* webLinkAttributedString =[[NSMutableAttributedString alloc]initWithString:@" 网页链接"attributes:@{NSFontAttributeName : IS_FONT(15),NSForegroundColorAttributeName : IS_COLOR_HEX(@"#3A83DC")}];UIImage* image = [UIImage imageNamed:@"QHWebLinkImage"];// UILabel 显示的图片富文本NSTextAttachment* textAttachment = [[NSTextAttachment alloc] init];textAttachment.image = image;CGFloat textPaddingTop =(IS_FONT(15).lineHeight - IS_FONT(15).pointSize) * 0.5;textAttachment.bounds =CGRectMake(0, -textPaddingTop, image.size.width, image.size.height);NSAttributedString* imageStr =[NSAttributedString attributedStringWithAttachment:textAttachment];[webLinkAttributedString insertAttributedString:imageStr atIndex:0];// 我们得到一个数组，这个数组中NSTextCheckingResult元素中包含我们要找的URL的range，// 当然可能找到多个URL，找到相应的URL的位置，用YYlabel的高亮点击事件处理跳转网页if (arrayOfAllMatches && arrayOfAllMatches.count > 0) {NSTextCheckingResult* match = arrayOfAllMatches[0];NSString* urlString = [attributedStr.string substringWithRange:match.range];[attributedStr replaceCharactersInRange:match.rangewithAttributedString:webLinkAttributedString];NSRange webLinkRange =NSMakeRange(match.range.location, webLinkAttributedString.length);// 对链接进行编码NSString* urlEncodeString =[urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];[attributedStr addAttribute:NSLinkAttributeNamevalue:urlEncodeStringrange:webLinkRange];// 检测剩下的字符串中链接NSArray* leftMatches =[regex matchesInString:attributedStr.stringoptions:0range:NSMakeRange(0, attributedStr.string.length)];if (leftMatches.count > 0) {[self analyseUrlWithContentString:attributedStr];}}
}

赋值YYlabel或UITextView

-(void)updateContentLabel{NSString*string =@"自定义"]；
NSString* channelString = @"去频道";
[mutAttributedString appendAttributedString:[[NSAttributedString alloc] initWithString:string attributes:@{  NSFontAttributeName : IS_FONT(15)}]];
NSRange channelRange =[mutAttributedString.string rangeOfString:channelString];
weak_IS(weakSelf);
[mutAttributedStringyy_setTextHighlightRange:channelRangecolor:[UIColorcolorWithHexString:@"#3A83DC"]backgroundColor:[UIColor colorWithWhite:1.0 alpha:0.6]         tapAction:^(UIView* containerView,NSAttributedString* text, NSRange range, CGRect rect) {[weakSelf pushTalkViewWithChannelShowId:weakSelf.experienceModel.idString];}];// 解析文本内链接
//  UITextView解析[self analyseTextViewUrlWithContentString:mutAttributedString];// 或者YYlabel解析[self analyseYYlabelWithContentString:mutAttributedString];_contentLabel.attributedText =mutAttributedString;}

YYlabel使用

识别富文本内容里边的链接并跳转：

- (YYLabel*)contentLabel {if (!_contentLabel) {_contentLabel = [[YYLabel alloc] init];_contentLabel.layer.cornerRadius=ChatViewGroupAndFriendMessageIconWH / 2;_contentLabel.layer.shouldRasterize = YES;_contentLabel.numberOfLines = 0;_contentLabel.font = [UIFont systemFontOfSize:15];_contentLabel.layer.rasterizationScale = [UIScreen mainScreen].scale;_contentLabel.backgroundColor = [UIColor clearColor];}return _contentLabel;
}

解析yylabel的富文本

- (void)analyseYYlabelWithContentString:(NSMutableAttributedString*)attributedStr {NSError* error = nil;NSString* regulaStr =@"((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/"@"[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/"@"=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/"@"[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)";NSRegularExpression* regex = [NSRegularExpressionregularExpressionWithPattern:regulaStroptions:NSRegularExpressionCaseInsensitiveerror:&error];NSArray* arrayOfAllMatches =[regex matchesInString:attributedStr.stringoptions:0range:NSMakeRange(0, attributedStr.string.length)];// 替换链接为汉字-"网页链接"NSMutableAttributedString* webLinkAttributedString =[[NSMutableAttributedString alloc]initWithString:@" 网页链接"attributes:@{NSFontAttributeName : IS_FONT(15),NSForegroundColorAttributeName : IS_COLOR_HEX(@"#3A83DC")}];UIImage* image = [UIImage imageNamed:@"QHWebLinkImage"];NSAttributedString* imageStr = [NSAttributedStringyy_attachmentStringWithContent:imagecontentMode:UIViewContentModeScaleAspectFillattachmentSize:CGSizeMake(image.size.width,image.size.height)alignToFont:IS_FONT(13)alignment:YYTextVerticalAlignmentCenter];[webLinkAttributedString insertAttributedString:imageStr atIndex:0];// 我们得到一个数组，这个数组中NSTextCheckingResult元素中包含我们要找的URL的range，weak_IS(weakSelf);// 当然可能找到多个URL，找到相应的URL的位置，用YYlabel的高亮点击事件处理跳转网页for (NSTextCheckingResult* match in arrayOfAllMatches) {NSString* urlString = [attributedStr.string substringWithRange:match.range];[attributedStr replaceCharactersInRange:match.rangewithAttributedString:webLinkAttributedString];NSRange webLinkRange =NSMakeRange(match.range.location, webLinkAttributedString.length);[attributedStryy_setTextHighlightRange:webLinkRangecolor:[UIColor colorWithHexString:@"#3A83DC"]backgroundColor:[UIColor colorWithWhite:1.0 alpha:0.6]tapAction:^(UIView* containerView,NSAttributedString* text, NSRange range,CGRect rect) {[weakSelf pushTalkViewWithUrlString:urlString];}];// 检测剩下的字符串中链接NSArray* leftMatches =[regex matchesInString:attributedStr.stringoptions:0range:NSMakeRange(0, attributedStr.string.length)];if (leftMatches.count > 0) {[self analyseUrlWithContentString:attributedStr];break;}}
}

总结

YYlabel 赋值富文本后计算文本高度有时会计算不准确，导致出现文字显示不全的问题。
UITextView使用更加便捷，功能性更强，也可长按复制等操作。

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UITextView使用与YYlabel使用比较

UITextView使用

赋值YYlabel或UITextView

YYlabel使用

解析yylabel的富文本

总结

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