// // MLExpressionManager.m // Pods // // Created by molon on 15/6/18. // // #import "MLExpressionManager.h" #import "MLTextAttachment.h" /* 如果设置高于1.00f的话，会引起 有表情行的行距 显得比 没表情行的行距 多，显得不工整 https://github.com/molon/MLLabel/issues/1 所以我们还是设置为1.00f，至于怎么解决这个问题，请参考Demo里的ClipExpressionViewController */ #define kExpressionLineHeightMultiple 1.00f @interface MLExpression() @property (nonatomic, copy) NSString *regex; @property (nonatomic, copy) NSString *plistName; @property (nonatomic, copy) NSString *bundleName; @property (nonatomic, strong) NSRegularExpression *expressionRegularExpression; @property (nonatomic, strong) NSDictionary *expressionMap; - (BOOL)isValid; @end @interface MLExpressionManager() @property (nonatomic, strong) NSMutableDictionary *expressionMapRecords; @property (nonatomic, strong) NSMutableDictionary *expressionRegularExpressionRecords; @end @implementation MLExpressionManager + (instancetype)sharedInstance { static MLExpressionManager *_sharedInstance = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ _sharedInstance = [[[self class] alloc]init]; }); return _sharedInstance; } #pragma mark - getter - (NSMutableDictionary *)expressionMapRecords { if (!_expressionMapRecords) { _expressionMapRecords = [NSMutableDictionary new]; } return _expressionMapRecords; } - (NSMutableDictionary *)expressionRegularExpressionRecords { if (!_expressionRegularExpressionRecords) { _expressionRegularExpressionRecords = [NSMutableDictionary new]; } return _expressionRegularExpressionRecords; } #pragma mark - common - (NSDictionary*)expressionMapWithPlistName:(NSString*)plistName { NSAssert(plistName&&plistName.length>0, @"expressionMapWithRegex:参数不得为空"); if (self.expressionMapRecords[plistName]) { return self.expressionMapRecords[plistName]; } NSString *plistPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:plistName]; NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:plistPath]; NSAssert(dict,@"表情字典%@找不到,请注意大小写",plistName); self.expressionMapRecords[plistName] = dict; return self.expressionMapRecords[plistName]; } - (NSRegularExpression*)expressionRegularExpressionWithRegex:(NSString*)regex { NSAssert(regex&®ex.length>0, @"expressionRegularExpressionWithRegex:参数不得为空"); if (self.expressionRegularExpressionRecords[regex]) { return self.expressionRegularExpressionRecords[regex]; } NSRegularExpression *re = [[NSRegularExpression alloc] initWithPattern:regex options:NSRegularExpressionCaseInsensitive error:nil]; NSAssert(re,@"正则%@有误",regex); self.expressionRegularExpressionRecords[regex] = re; return self.expressionRegularExpressionRecords[regex]; } //多线程转表情attrStr + (NSArray *)expressionAttributedStringsWithStrings:(NSArray*)strings expression:(MLExpression*)expression { NSMutableDictionary *results = [NSMutableDictionary dictionaryWithCapacity:strings.count]; dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); dispatch_group_t group = dispatch_group_create(); for (id str in strings) { dispatch_group_async(group, queue, ^{ NSAttributedString *result = [MLExpressionManager expressionAttributedStringWithString:str expression:expression]; @synchronized(results){ results[str] = result; } }); } dispatch_group_wait(group, DISPATCH_TIME_FOREVER); //重新排列 NSMutableArray *resultArr = [NSMutableArray arrayWithCapacity:results.count]; for (id str in strings) { [resultArr addObject:results[str]]; } return resultArr; } + (void)expressionAttributedStringsWithStrings:(NSArray*)strings expression:(MLExpression*)expression callback:(void(^)(NSArray *result))callback { NSMutableDictionary *results = [NSMutableDictionary dictionaryWithCapacity:strings.count]; dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); dispatch_group_t group = dispatch_group_create(); for (id str in strings) { dispatch_group_async(group, queue, ^{ NSAttributedString *result = [MLExpressionManager expressionAttributedStringWithString:str expression:expression]; @synchronized(results){ results[str] = result; } }); } dispatch_group_notify(group, queue, ^{ //重新排列 NSMutableArray *resultArr = [NSMutableArray arrayWithCapacity:results.count]; for (id str in strings) { [resultArr addObject:results[str]]; } dispatch_async(dispatch_get_main_queue(), ^{ if (callback) { callback(resultArr); } }); }); } + (NSAttributedString*)expressionAttributedStringWithString:(id)string expression:(MLExpression*)expression { NSAssert(expression&&[expression isValid], @"expression invalid"); NSAssert([string isKindOfClass:[NSString class]]||[string isKindOfClass:[NSAttributedString class]], @"string非字符串. %@",string); NSAttributedString *attributedString = nil; if ([string isKindOfClass:[NSString class]]) { attributedString = [[NSAttributedString alloc]initWithString:string]; }else{ attributedString = string; } if (attributedString.length<=0) { return attributedString; } NSMutableAttributedString *resultAttributedString = [NSMutableAttributedString new]; //处理表情 NSArray *results = [expression.expressionRegularExpression matchesInString:attributedString.string options:NSMatchingWithTransparentBounds range:NSMakeRange(0, [attributedString length])]; //遍历表情，然后找到对应图像名称，并且处理 NSUInteger location = 0; for (NSTextCheckingResult *result in results) { NSRange range = result.range; NSAttributedString *subAttrStr = [attributedString attributedSubstringFromRange:NSMakeRange(location, range.location - location)]; //先把非表情的部分加上去 [resultAttributedString appendAttributedString:subAttrStr]; //下次循环从表情的下一个位置开始 location = NSMaxRange(range); NSAttributedString *expressionAttrStr = [attributedString attributedSubstringFromRange:range]; NSString *imageName = expression.expressionMap[expressionAttrStr.string]; if (imageName.length>0) { //加个表情到结果中 UIImage *image = nil; if ([UIImage respondsToSelector:@selector(imageNamed:inBundle:compatibleWithTraitCollection:)]) { NSBundle *bundle = [NSBundle bundleWithURL:[[NSBundle mainBundle] URLForResource:expression.bundleName withExtension:nil]]; image = [UIImage imageNamed:imageName inBundle:bundle compatibleWithTraitCollection:nil]; }else{ NSString *imagePath = [expression.bundleName stringByAppendingPathComponent:imageName]; image = [UIImage imageNamed:imagePath]; } MLTextAttachment *textAttachment = [MLTextAttachment textAttachmentWithLineHeightMultiple:kExpressionLineHeightMultiple imageBlock:^UIImage *(CGRect imageBounds, NSTextContainer *textContainer, NSUInteger charIndex, MLTextAttachment *textAttachment) { return image; } imageAspectRatio:image.size.width/image.size.height]; NSMutableAttributedString *attachmentAttributedString = [[NSAttributedString attributedStringWithAttachment:textAttachment]mutableCopy]; [expressionAttrStr enumerateAttributesInRange:NSMakeRange(0, expressionAttrStr.length) options:0 usingBlock:^(NSDictionary *attrs, NSRange range, BOOL *stop) { if (attrs.count>0&&range.length==expressionAttrStr.length) { [attachmentAttributedString addAttributes:attrs range:NSMakeRange(0, attachmentAttributedString.length)]; } }]; [resultAttributedString appendAttributedString:attachmentAttributedString]; }else{ //找不到对应图像名称就直接加上去 [resultAttributedString appendAttributedString:expressionAttrStr]; } } if (location < [attributedString length]) { //到这说明最后面还有非表情字符串 NSRange range = NSMakeRange(location, [attributedString length] - location); NSAttributedString *subAttrStr = [attributedString attributedSubstringFromRange:range]; [resultAttributedString appendAttributedString:subAttrStr]; } return resultAttributedString; } @end @implementation MLExpression - (BOOL)isValid { return self.expressionRegularExpression&&self.expressionMap&&self.bundleName.length>0; } + (instancetype)expressionWithRegex:(NSString*)regex plistName:(NSString*)plistName bundleName:(NSString*)bundleName { MLExpression *expression = [MLExpression new]; expression.regex = regex; expression.plistName = plistName; expression.bundleName = bundleName; NSAssert([expression isValid], @"此expression无效，请检查参数"); return expression; } #pragma mark - setter - (void)setRegex:(NSString *)regex { NSAssert(regex.length>0, @"regex length must >0"); _regex = [regex copy]; self.expressionRegularExpression = [[MLExpressionManager sharedInstance]expressionRegularExpressionWithRegex:regex]; } - (void)setPlistName:(NSString *)plistName { NSAssert(plistName.length>0, @"plistName's length must >0"); _plistName = [plistName copy]; if (![[_plistName lowercaseString] hasSuffix:@".plist"]) { _plistName = [_plistName stringByAppendingString:@".plist"]; } self.expressionMap = [[MLExpressionManager sharedInstance]expressionMapWithPlistName:_plistName]; } - (void)setBundleName:(NSString *)bundleName { _bundleName = [bundleName copy]; if (![[_bundleName lowercaseString] hasSuffix:@".bundle"]) { _bundleName = [_bundleName stringByAppendingString:@".bundle"]; } //TODO: 这个最好验证下存在性，后期搞 } @end