ios 显示html标签,超链接颜色以及下划线的处理
有的时候，我们的app需要显示html标签的效果，这个时候，如果需求不是特别复杂的话，我们都是可以使用textView来实现的。对冉Label也可以实现，但是label很难实现超链接的点击效果，所以，还是建议使用textView。 //modelData.content的数据其中一个是这种结构： //<a href="juzi://article/detail/native?id=37352">橘子君请大家参加party啦，等大家来玩，点我报名，快来和橘子君一起玩耍吧！</a> NSString * htmlString = modelData.content; NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil]; self.textView.attributedText = attributedString; //设置textView的高度，这里是根据文字计算的textView的高度 self.textViewHeight.constant = [PublicTool normalFontheightWithWidth:mScreenWidth - 24 andString:[attributedString string] andFontSize:14]+15; self.textView.linkTextAttributes = @{ NSForegroundColorAttributeName:[UIColor colorFromRGB:0xfc5f59],//设置超链接颜色 NSUnderlineStyleAttributeName:@(NSUnderlineStyleNone),//设置超链接的下划线为none，但是在ios10上无效，自己测试的无效，原因没找到呢 NSUnderlineColorAttributeName:[UIColor whiteColor]//无奈，只得除此下策，改变下划线颜色为白色，因为背景是白色，所以就隐藏了下划线 };//设置链接的文字颜色 normalFontheightWithWidth方法如下：（供参考） //根据文字，宽度，字体大小计算高度 +(CGFloat)normalFontheightWithWidth:(CGFloat)width andString:(NSString *)str andFontSize:(int)fontSize{ CGSize titleSize = [str boundingRectWithSize:CGSizeMake(width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:fontSize]} context:nil].size; return titleSize.height ; } 附超链接的属性： /************************ Attributes ************************/ // Predefined character attributes for text. If the key is not in the dictionary, then use the default values as described below. UIKIT_EXTERN NSString * const NSFontAttributeName NS_AVAILABLE(10_0, 6_0); // UIFont, default Helvetica(Neue) 12 UIKIT_EXTERN NSString * const NSParagraphStyleAttributeName NS_AVAILABLE(10_0, 6_0); // NSParagraphStyle, default defaultParagraphStyle UIKIT_EXTERN NSString * const NSForegroundColorAttributeName NS_AVAILABLE(10_0, 6_0); // UIColor, default blackColor UIKIT_EXTERN NSString * const NSBackgroundColorAttributeName NS_AVAILABLE(10_0, 6_0); // UIColor, default nil: no background UIKIT_EXTERN NSString * const NSLigatureAttributeName NS_AVAILABLE(10_0, 6_0); // NSNumber containing integer, default 1: default ligatures, 0: no ligatures UIKIT_EXTERN NSString * const NSKernAttributeName NS_AVAILABLE(10_0, 6_0); // NSNumber containing floating point value, in points; amount to modify default kerning. 0 means kerning is disabled. UIKIT_EXTERN NSString * const NSStrikethroughStyleAttributeName NS_AVAILABLE(10_0, 6_0); // NSNumber containing integer, default 0: no strikethrough UIKIT_EXTERN NSString * const NSUnderlineStyleAttributeName NS_AVAILABLE(10_0, 6_0); // NSNumber containing integer, default 0: no underline UIKIT_EXTERN NSString * const NSStrokeColorAttributeName NS_AVAILABLE(10_0, 6_0); // UIColor, default nil: same as foreground color UIKIT_EXTERN NSString * const NSStrokeWidthAttributeName NS_AVAILABLE(10_0, 6_0); // NSNumber containing floating point value, in percent of font point size, default 0: no stroke; positive for stroke alone, negative for stroke and fill (a typical value for outlined text would be 3.0) UIKIT_EXTERN NSString * const NSShadowAttributeName NS_AVAILABLE(10_0, 6_0); // NSShadow, default nil: no shadow UIKIT_EXTERN NSString *const NSTextEffectAttributeName NS_AVAILABLE(10_10, 7_0); // NSString, default nil: no text effect UIKIT_EXTERN NSString * const NSAttachmentAttributeName NS_AVAILABLE(10_0, 7_0); // NSTextAttachment, default nil UIKIT_EXTERN NSString * const NSLinkAttributeName NS_AVAILABLE(10_0, 7_0); // NSURL (preferred) or NSString UIKIT_EXTERN NSString * const NSBaselineOffsetAttributeName NS_AVAILABLE(10_0, 7_0); // NSNumber containing floating point value, in points; offset from baseline, default 0 UIKIT_EXTERN NSString * const NSUnderlineColorAttributeName NS_AVAILABLE(10_0, 7_0); // UIColor, default nil: same as foreground color UIKIT_EXTERN NSString * const NSStrikethroughColorAttributeName NS_AVAILABLE(10_0, 7_0); // UIColor, default nil: same as foreground color UIKIT_EXTERN NSString * const NSObliquenessAttributeName NS_AVAILABLE(10_0, 7_0); // NSNumber containing floating point value; skew to be applied to glyphs, default 0: no skew UIKIT_EXTERN NSString * const NSExpansionAttributeName NS_AVAILABLE(10_0, 7_0); // NSNumber containing floating point value; log of expansion factor to be applied to glyphs, default 0: no expansion UIKIT_EXTERN NSString * const NSWritingDirectionAttributeName NS_AVAILABLE(10_6, 7_0); // NSArray of NSNumbers representing the nested levels of writing direction overrides as defined by Unicode LRE, RLE, LRO, and RLO characters. The control characters can be obtained by masking NSWritingDirection and NSWritingDirectionFormatType values. LRE: NSWritingDirectionLeftToRight|NSWritingDirectionEmbedding, RLE: NSWritingDirectionRightToLeft|NSWritingDirectionEmbedding, LRO: NSWritingDirectionLeftToRight|NSWritingDirectionOverride, RLO: NSWritingDirectionRightToLeft|NSWritingDirectionOverride, UIKIT_EXTERN NSString * const NSVerticalGlyphFormAttributeName NS_AVAILABLE(10_7, 6_0); // An NSNumber containing an integer value. 0 means horizontal text. 1 indicates vertical text. If not specified, it could follow higher-level vertical orientation settings. Currently on iOS, it's always horizontal. The behavior for any other value is undefined. 加油吧！
