IOS7 textkit 的相关

标签：

去年基于5.0开发的时候，自己用coreText编写了一个富文本，所有的效果都实现的很好。但是没有去测试效率，不过在cell重用的时候表现不错，在4s上面也不会卡顿。

唯一一个问题就是，在使用AL的时候，不方便。所以，此次新版本是基于7.0开发。决定使用textkit重新编写一次。

下面是一些基本的使用：

@interface MMTextAttachment : NSTextAttachment
{
    
}

@end

@implementation MMTextAttachment

//I want my emoticon has the same size with line's height
- (CGRect)attachmentBoundsForTextContainer:(NSTextContainer *)textContainer proposedLineFragment:(CGRect)lineFrag glyphPosition:(CGPoint)position characterIndex:(NSUInteger)charIndex NS_AVAILABLE_IOS(7_0)
{
    NSLog(@"\n lineFrag={%f,%f,%f,%f} \n",lineFrag.origin.x,lineFrag.origin.y,lineFrag.size.width,lineFrag.size.height);
    NSLog(@"\n glyphPosition={%f,%f} \n",position.x,position.y);
    CGFloat lineHeight = lineFrag.size.height;
    CGFloat abc = 21.0;
    return CGRectMake( 0 , (lineHeight - abc)/2.0 , abc , abc);
}

// 点击处理
    // http://stackoverflow.com/questions/19332283/detecting-taps-on-attributed-text-in-a-uitextview-on-ios-7
    NSMutableAttributedString * string = [[ NSMutableAttributedString alloc ] initWithString:@"1@谭中洞 2345678910 http://gutou.com 1112what happendwhatg一个地址 重庆市渝中区210号 02364646464 happendwhat happendwhat happendwhat happendwhat happend This is an example by @marcelofabri_ #abcdef "  attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:14.0]} ] ;
    MMTextAttachment * textAttachment = [[ MMTextAttachment alloc ] initWithData:nil ofType:nil ] ;
    textAttachment.image = [UIImage imageNamed:@"002.png"] ;
    NSAttributedString * textAttachmentString = [ NSAttributedString attributedStringWithAttachment:textAttachment ] ;
    [string insertAttributedString:textAttachmentString atIndex:7] ;
    
    MMTextAttachment * textAttachmen2t = [[ MMTextAttachment alloc ] initWithData:nil ofType:nil ] ;
    
    [[SDWebImageManager sharedManager] downloadImageWithURL:[NSURL URLWithString:@"https://www.baidu.com/img/baidu_jgylogo3.gif?v=27357745.gif"] options:0 progress:nil completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
        // 使用网络下载，下载完成后，重新刷新下这个range
        textAttachmen2t.image = image;
        [_textView.layoutManager invalidateDisplayForCharacterRange:NSMakeRange(57, 1)]; // UILabel可以使用<span style="font-family: monospace; white-space: pre; background-color: rgb(240, 240, 240);">setNeedsDisplay
</span>    }];
    
    NSAttributedString * textAttachmentStr2ing = [ NSAttributedString attributedStringWithAttachment:textAttachmen2t ] ;
    [string insertAttributedString:textAttachmentStr2ing atIndex:57] ;
    //
    NSRange range1 = [[string string] rangeOfString:@"@marcelofabri_"];
    [string addAttribute:NSLinkAttributeName
                   value:@"URL://jsonstring"
                   range:range1];
    NSLog(@"\n range1 = %@ \n",NSStringFromRange(range1));
    NSRange range2 = [[string string] rangeOfString:@"#abcdef "];
    [string addAttribute:NSLinkAttributeName
                   value:@"URL://jsonstring"
                   range:range2];
    NSLog(@"\n range2 = %@ \n",NSStringFromRange(range2));
    
//    [string addAttributes:@{NSForegroundColorAttributeName: [UIColor blueColor]} range:range1];
//    [string addAttributes:@{NSForegroundColorAttributeName: [UIColor greenColor]} range:range2];
    
    /*
     // 自定link的颜色
     NSDictionary *linkAttributes = @{
     NSForegroundColorAttributeName: [UIColor blueColor],
     NSUnderlineColorAttributeName: [UIColor redColor],
     NSUnderlineStyleAttributeName: @(NSUnderlinePatternSolid)
     };
     _textView.linkTextAttributes = linkAttributes; // customizes the appearance of links
     */
    _textView.dataDetectorTypes = UIDataDetectorTypeLink;
    _textView.attributedText = string ;
    _textView.selectable = YES; // 才能实现点击delegate
    _textView.scrollEnabled = NO;// 设置为AL后才会自动算高
    _textView.editable = NO;
    _textView.delegate = self;

- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange

http://stackoverflow.com/questions/19332283/detecting-taps-on-attributed-text-in-a-uitextview-on-ios-7

明天准备花一天时间，结合以前写过的重新编写一次。如果有啥后续再补充。

之前写过的解析有表情，@ ## 等可以点击的URL，下面是效果图

不知道为什么底部会添加一个版权所有。我了个去～～ 随便转，不要看下面的，(但是也请注明出处).

IOS7 textkit 的相关

标签：

原文地址：http://blog.csdn.net/icash/article/details/46928329