使用UITextView实现图文混排
使用UITextView实现超链接，与自定义表情皮配，还能加载自定义大小的本地图片与网络图片。
源码请点击github地址下载。
用的是系统UITextView控件的linkTextAttributes和attributedText属性实现了此功能，相关API须在>=7.0的系统上运行。由于实现了在文本里加载网络图片，所以导入了SDWebImage第三方文件，若不需要可以删除LXTextView.h文件里的相关代码（#import "UIImageView+WebCache.h"以及- (void)downloadImageWithUrl:(NSString *)urlString withIndex:(NSInteger)index
）。
效果图如下：
screen.png
注意：
- 效果图上匹配了一些错误的网址，那没关系，正则表达式不够严谨，这也可以满足一般需求了。
- 链接需要深按才有效，系统的原因。
使用方法非常简单，集成代码如下：
LXTextView *textView = [[LXTextView alloc] initWithFrame:CGRectMake(10, 10, kScreenWidth - 20, kScreenHeight - 20)];
textView.delegate = self;
textView.editable = NO; // 非编辑状态下才可以点击Url]
textView.fontFloat = 18.;
textView.textString = @"Thiswww.hiphotos.baidu.comis ancel超链接ofa bri_StringWith Attachment:textAttachment]indfdxcsehttps://www.baidu.comrtAttribu tedStriUse [傲慢]this method to release shared invali dateexwwwwssdvdv.hiphotos.baidu.dsccomamptimers, and [吓]isa覆盖核 http://c.hip[大哭]hotos.baidu.com设施nexstore enough application state information[微笑] to re https://c.hiphotos.baidu.cnstore your";
[self.view addSubview:textView];核心代码如下：
- (void)setTextString:(NSString *)string
{
NSDictionary *attributeDict =
[NSDictionary dictionaryWithObjectsAndKeys:
[UIFont systemFontOfSize:self.fontFloat], NSFontAttributeName,
[UIColor blackColor], NSForegroundColorAttributeName,nil];
attributedString = [[NSMutableAttributedString alloc] initWithString:string attributes:attributeDict];
//设置行距与换行模式
NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = 5.0;
paragraphStyle.lineBreakMode = NSLineBreakByCharWrapping;
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, string.length)];
NSArray *emojiArr = [LXHelpClass validateEmojiOfText:attributedString.string];
for (int i = 0; i < emojiArr.count; i++) {
NSInteger index = [helpClass.keyArr indexOfObject:emojiArr[i]];
NSString *imgName = [helpClass.valueArr objectAtIndex:index];
NSRange range = [attributedString.string rangeOfString:emojiArr[i] options:NSCaseInsensitiveSearch range:NSMakeRange(0, attributedString.string.length)];
//正则表达式匹配的表情
LXTextAttachment *textAttachmentEmoji = [[LXTextAttachment alloc] initWithData:nil ofType:nil];
textAttachmentEmoji.imgSize = CGSizeMake(30 ,30);
textAttachmentEmoji.image = [UIImage imageNamed:imgName] ;
NSAttributedString *textAttachmentString = [NSAttributedString attributedStringWithAttachment:textAttachmentEmoji];
[attributedString replaceCharactersInRange:range withAttributedString:textAttachmentString];
}
//自定义添加的本地图片
LXTextAttachment *textAttachmentImg = [[LXTextAttachment alloc] initWithData:nil ofType:nil];
textAttachmentImg.imgSize = CGSizeMake(270, 160);
textAttachmentImg.image = [UIImage imageNamed:@"bird"];
NSAttributedString *textAttachmentString2 = [NSAttributedString attributedStringWithAttachment:textAttachmentImg];
[attributedString insertAttributedString:textAttachmentString2 atIndex:56];
NSArray *linkArr = [LXHelpClass validateLinkOfText:attributedString.string];
for (int i = 0; i < linkArr.count; i++) {
NSRange range = NSRangeFromString(linkArr[i]);
//正则表达式匹配的链接
NSString *linkStr = [attributedString.string substringWithRange:range];
[attributedString addAttribute:NSLinkAttributeName value:linkStr range:range];
}
//自定义的链接
[attributedString addAttribute:NSLinkAttributeName value:@"http://baidu.com" range:[[attributedString string] rangeOfString:@"超链接"]];
NSDictionary *linkAttributes =
@{NSForegroundColorAttributeName:[UIColor greenColor], NSUnderlineColorAttributeName:[UIColor lightGrayColor], NSUnderlineStyleAttributeName:@(NSUnderlinePatternSolid)};
self.linkTextAttributes = linkAttributes;
self.attributedText = attributedString;
}
