/*
1.創建NSTextAttachment對象
2.設置image屬性為需要展示的圖片
3.設置bounds屬性為需要展示的大小
4.通過NSTextAttachment對象生成NSAttributedString對象
5.通過字符串創建NSMutableAttributedString
6.把NSAttributedString插入到NSMutableAttributedString的任意位置
7.把NSMutableAttributedString賦值給attributedText
*/
//在文本中加入表情
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 20, 300, 200)];
label.numberOfLines= 0;
NSString *text =@"這是一個表情";
UIFont *font = [UIFont systemFontOfSize:30];
label.font = font;
label.text = text;
[self.view addSubview:label];
//創建NSTextAttachment的對象文本附件
NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
//創建圖片
UIImage *image = [UIImage imageNamed:@"8.jpg"];
//在文本附件上設置圖片
attachment.image= image;
//設置圖片大小圖片寬高和文字寬高一致
attachment.bounds=CGRectMake(0, 0, font.lineHeight, font.lineHeight);
//根據attachment創建屬性字符串
NSAttributedString *attr = [NSAttributedString attributedStringWithAttachment:attachment];
//創建可變屬性字符串將原本的text的內容轉化為可變的字符串
NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:text];
//選擇插入的文字上的位置第6位
[attrStr insertAttributedString:attrat Index:6];
//替換
[attrStr replaceCharactersInRange:NSMakeRange(5, 1) withAttributedString:attr];
//添加labe進行顯示
label.attributedText = attrStr;
//通過資源路徑獲取圖片進行顯示
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 20, 300, 200)];
label.numberOfLines= 0;
UIFont *font = [UIFont systemFontOfSize:30];
label.font= font;
[self.view addSubview:label];
NSString *text =@"今天吃飯吃了三碗飯,好開心[笑哈哈],但是胖了三斤[淚流滿面]";
//正則表達式
NSString *pattern =@"\\[[a-zA-Z0-9\\u4e00-\\u9fa5]+]";
//創建正則對象
NSRegularExpression *regular = [NSRegularExpression regularExpressionWithPattern:pattern options:0 error:nil];
//接收根據正則表達式搜索到的結果數組
NSArray *resultArray = [regular matchesInString:text options:0 range:NSMakeRange(0, text.length)];
//創建可變屬性字符串將原本的text的內容轉化為可變的字符串
NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:text];
//聲明偏移量屬性
__block NSIntegeroffset = 0;
//遍歷結果數組
[resultArray enumerateObjectsUsingBlock:^(NSTextCheckingResult *_Nonnullobj,NSUIntegeridx,BOOL *_Nonnullstop) {
//根據偏移量獲取實際是range
NSRange range =NSMakeRange(obj.range.location- offset, obj.range.length);
//取出表情對應的字符串
NSString *face = [text substringWithRange:obj.range];
//創建NSTextAttachment的對象文本附件
NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
//根據名字字符串去資源路徑中拿取對應的圖片
UIImage *image = [[UIImage alloc] initWithContentsOfFile:[self pathForEmoticonWithName:face]];
//把圖片添加到文本附件上
attachment.image = image;
//可以不用設置大小,會自動適應
//attachment.bounds = CGRectMake(0, 0, font.lineHeight, font.lineHeight);
//設置文本附件的屬性字符串
NSAttributedString *att = [NSAttributedString attributedStringWithAttachment:attachment];
//圖片代替文字
[attrStr replaceCharactersInRange:range withAttributedString:att];
//更新偏移量(這樣計算下一個的obj.range.location才不會出錯)
//obj.range.length -------5-----6
//offset = obj.range.length - 1 -----4---5
//offset = offset + offset--------4----9
offset += obj.range.length-1;
}];
//加載到label上
label.attributedText= attrStr;
}
//根據圖片名字獲取圖片資源的具體路徑
- (NSString *)pathForEmoticonWithName:(NSString *)name {
//資源在哪
NSString *bundlePath = [[NSBundle mainBundle] pathForResource:@"Emoticons" ofType:@"bundle"];
//拼接資源路徑
NSString *path1 = [bundlePath stringByAppendingPathComponent:@"com.sina.lxh/info.plist"];
//接收從資源路徑獲取的字典內容
_dic = [NSDictionary dictionaryWithContentsOfFile:path1];
//從字典中提取出圖片包
NSArray *array =_dic[@"emoticons"];
//開始設置要返回的圖片資源路徑
NSString *path =nil;
//遍歷表情包數組里的字典
for(NSDictionary *dicinarray) {
//從字典里找出名字對應的元素
if([dic[@"chs"] isEqualToString:name]) {
//找出圖片名字
NSString *png = [dic objectForKey:@"png"];
//拼接出具體的圖片資源路徑 png = "lxh_xiaohaha.png";
path = [bundlePath stringByAppendingPathComponent:[NSStringstringWithFormat:@"com.sina.lxh/%@",png]];
break;
}
}
//返回具體路徑
return path;
}
