发布feed编辑富文本@处理

//@ textView-Delegate 
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
    if ([text isEqualToString:@"@"]) {//回调@群成员
        FeedUserListVC* vc = [[FeedUserListVC alloc]init];
        vc.alterUserListBlock = ^(KLFeedNoteSqlModel*model){
            _textview.text = [NSString stringWithFormat:@"%@@%@ ",_textview.text,model.nick_name];
            [self setAlterAttributed];
        };
        vc.becomeFirstResponderBlock = ^(){
            [_textview becomeFirstResponder];
        };
        vc.aterFlagForcancelBlock = ^(){
            _textview.text = [NSString stringWithFormat:@"%@ @",_textview.text];
            [self setAlterAttributed];
        };
        [self.navigationController presentViewController:[[UINavigationController alloc]initWithRootViewController:vc] animated:YES completion:nil];
    }else{
      //这里有个issue，要是不稍等一下，效果就很诡异，比如说在@字符后面刚输入第一个字：“好”字，参数text= “好”，但是断点来到这里_textview.text并没有得到这个字，所以在取range的时候会不准，但是多输入几个字又正常，所以姑且这样解决
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [self setAlterAttributed];
        });
    }
    return YES;
}

//设置属性
-(void)setAlterAttributed{
    NSMutableAttributedString* attributedString = [[NSMutableAttributedString alloc]initWithString:_textview.text];
    NSArray* alterArray =  [self getRangesForUserHandles:_textview.text];
    for (NSMutableDictionary* dicTemp in alterArray) {
        [attributedString addAttribute:NSForegroundColorAttributeName value:[JJTool colorWithHexValue:0x5f6c80] range: [[dicTemp objectForKey:KILabelRangeKey] rangeValue]];
    }
    [attributedString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:15] range: NSMakeRange(0, attributedString.length)];
    _textview.attributedText = attributedString;
}

//正则过滤@字段
- (NSArray *)getRangesForUserHandles:(NSString *)text
{
    NSMutableArray *rangesForUserHandles = [[NSMutableArray alloc] init];
    // Setup a regular expression for user handles and hashtags
    static NSRegularExpression *regex = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        NSError *error = nil;
        regex = [[NSRegularExpression alloc] initWithPattern:@"@[\u4e00-\u9fa5_a-zA-Z0-9-]+" options:0 error:&error];
        //        regex = [[NSRegularExpression alloc] initWithPattern:@"(?<!\\w)@([\\w\\_-]+)?" options:0 error:&error];
    });
    // Run the expression and get matches
    NSArray *matches = [regex matchesInString:text options:0 range:NSMakeRange(0, text.length)];
    // Add all our ranges to the result
    for (NSTextCheckingResult *match in matches)
    {
        NSRange matchRange = [match range];
        NSString *matchString = [text substringWithRange:matchRange];
//        if (![self ignoreMatch:matchString])
//        {
            [rangesForUserHandles addObject:@{KILabelLinkTypeKey : @(KILinkTypeUserHandle),
                                              KILabelRangeKey : [NSValue valueWithRange:matchRange],
                                              KILabelLinkKey : matchString
                                              }];
//        }
    }
    return rangesForUserHandles;
}

//为了兼容系统键盘拼音输入故改之，也是奇葩了
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{

    if ([text isEqualToString:@"@"]) {//回调@
        FeedUserListVC* vc = [[FeedUserListVC alloc]init];
        vc.alterUserListBlock = ^(KLFeedNoteSqlModel*model){

            NSMutableString *targerStr = [[NSMutableString alloc] initWithString:_textview.text ];
            [targerStr insertString:[NSString stringWithFormat:@"@%@ ",model.nick_name] atIndex:range.location];
            _textview.text = targerStr;
            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                [self setAlterAttributed];
                _textview.selectedRange = NSMakeRange(range.location + [NSString stringWithFormat:@"@%@ ",model.nick_name].length, 0);
            });
        };

        vc.aterFlagForcancelBlock = ^(){
            NSMutableString *alterStr = [[NSMutableString alloc] initWithString:_textview.text ];
            NSString* str = [NSString stringWithFormat:@" @"];
            [alterStr insertString:str atIndex:range.location];
            _textview.text = alterStr;
            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                    [self setAlterAttributed];
                    _textview.selectedRange = NSMakeRange(range.location + str.length, 0);
            });
        };
        vc.becomeFirstResponderBlock = ^(){
            [_textview becomeFirstResponder];
        };
        [self.navigationController presentViewController:[[UINavigationController alloc]initWithRootViewController:vc] animated:YES completion:nil];
    }else{
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            if ([text isEqualToString:@"➋"] || [text isEqualToString:@"➌"]||[text isEqualToString:@"➍"] || [text isEqualToString:@"➎"]||[text isEqualToString:@"➏"] || [text isEqualToString:@"➐"]||[text isEqualToString:@"➑"] || [text isEqualToString:@"➒"]) {
                //系统九宫格不处理
            }else{
                if ([[[UITextInputMode currentInputMode] primaryLanguage] isEqualToString:@"zh-Hans"]) {
                    NSString* str = @"qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM";
                    if ([str  rangeOfString:text].location != NSNotFound) {
                        //系统全键盘不处理
                    }else{
                        [self setAlterAttributed];
                        _textview.selectedRange = NSMakeRange(range.location + text.length, 0);
                    }
                }else{
                    [self setAlterAttributed];
                    _textview.selectedRange = NSMakeRange(range.location + text.length, 0);
                }
            }
        });
    }

    return YES;
}