檢測textView裏面的文字是否包含emoji表情字符

  用這個方法能夠檢測出來,返回bool值

- (BOOL)stringContainsEmoji:(NSString *)string

{
    
    __block BOOL returnValue = NO;
    
    
    
    [string enumerateSubstringsInRange:NSMakeRange(0, [string length])
     
                               options:NSStringEnumerationByComposedCharacterSequences
     
                            usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
                                
                                const unichar hs = [substring characterAtIndex:0];
                                
                                if (0xd800 <= hs && hs <= 0xdbff) {
                                    
                                    if (substring.length > 1) {
                                        
                                        const unichar ls = [substring characterAtIndex:1];
                                        
                                        const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
                                        
                                        if (0x1d000 <= uc && uc <= 0x1f77f) {
                                            
                                            returnValue = YES;
                                            
                                        }
                                        
                                    }
                                    
                                } else if (substring.length > 1) {
                                    
                                    const unichar ls = [substring characterAtIndex:1];
                                    
                                    if (ls == 0x20e3) {
                                        
                                        returnValue = YES;
                                        
                                    }
                                    
                                } else {
                                    
                                    if (0x2100 <= hs && hs <= 0x27ff) {
                                        
                                        returnValue = YES;
                                        
                                    } else if (0x2B05 <= hs && hs <= 0x2b07) {
                                        
                                        returnValue = YES;
                                        
                                    } else if (0x2934 <= hs && hs <= 0x2935) {
                                        
                                        returnValue = YES;
                                        
                                    } else if (0x3297 <= hs && hs <= 0x3299) {
                                        
                                        returnValue = YES;
                                        
                                    } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) {
                                        
                                        returnValue = YES;
                                        
                                    }
                                    
                                }
                                
                            }];
    
    
    
    return returnValue;
    
}

能夠將這個方法加在NSString的分類,要麼就直接貼在當前控制器,在即將提交文字,或者要點擊發送文字的時候進行判斷,能夠利用彈alertview來提醒從新輸入

這個方法也是在網上找的 ,具體出處不記得了