iOS富文本Label实现点击事件，类似Word在横线上输入编辑

.h

import

NS_ASSUME_NONNULL_BEGIN

@interface GHAttributesLabel : UILabel
typedef void(^GHAttributesBlock)(NSRange poinRange);
/**

@param text 传入富文本类型的字符串
@param actionText 要响应事件的字符串
*/

• (void)setAttributesText: (NSMutableAttributedString *)text
  actionText: (NSString *)actionText;

/**
点击事件回调
*/
@property (nonatomic , copy) GHAttributesBlock actionBlock;

.m
//
// GHAttributesLabel.m
// GHAttributesLabelDemo
//
// Created by zhaozhiwei on 2019/1/20.
// Copyright © 2019年 GHome. All rights reserved.
//

import "GHAttributesLabel.h"

@interface GHTextView : UITextView

@end
@implementation GHTextView

• (BOOL)canPerformAction:(SEL)action withSender:(id)sender
  {
  // 返回NO为禁用，YES为开启
  // 粘贴
  if (action == @selector(paste:)) return NO;
  // 剪切
  if (action == @selector(cut:)) return NO;
  // 复制
  if (action == @selector(copy:)) return NO;
  // 选择
  if (action == @selector(select:)) return NO;
  // 选中全部
  if (action == @selector(selectAll:)) return NO;
  // 删除
  if (action == @selector(delete:)) return NO;
  // 分享
  if (action == @selector(share)) return NO;
  return [super canPerformAction:action withSender:sender];
  }

• (BOOL)canBecomeFirstResponder {
  return NO;
  }

@end

@interface GHAttributesLabel()

@property (nonatomic , strong) GHTextView *textView ;

@property (nonatomic , copy) NSString *actionText ;

/** <#注释#>*/
@property (nonatomic, assign) NSRange range;

@end
@implementation GHAttributesLabel

• (void)setAttributesText: (NSMutableAttributedString *)text actionText: (NSString *)actionText{
  self.textView.attributedText = text;
  self.actionText = actionText;
  // self.range = actionRange;
  }

• (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange interaction:(UITextItemInteraction)interaction {
  // if ([textView.text containsString:self.actionText]) {
  if (self.actionBlock) {
  self.actionBlock(characterRange);
  }
  return NO;
  // }

// return YES;
}

• (instancetype)init {
  if (self == [super init]) {
  [self setupUI];
  [self configuration];
  }
  return self;
  }

• (instancetype)initWithFrame:(CGRect)frame {
  if (self == [super initWithFrame:frame]) {
  [self setupUI];
  [self configuration];
  }
  return self;
  }

• (void)configuration {
  self.userInteractionEnabled = YES;
  }

• (void)setupUI {
  [self addSubview:self.textView];
  }

• (void)layoutSubviews {
  self.textView.frame = self.bounds;
  }

• (GHTextView *)textView {
  if (_textView == nil) {
  _textView = [[GHTextView alloc]init];
  _textView.backgroundColor = self.backgroundColor;
  _textView.textColor = self.textColor;
  self.textColor = [UIColor clearColor];
  _textView.font = self.font;
  _textView.scrollEnabled = NO;
  _textView.text = self.text;
  _textView.delegate = self;
  _textView.editable = NO;
  _textView.textAlignment = self.textAlignment;
  _textView.linkTextAttributes = @{NSForegroundColorAttributeName:[UIColor redColor]};
  }
  return _textView;
  }

@end

使用
-(void)test{
GHAttributesLabel *attributesLabel = [[GHAttributesLabel alloc]initWithFrame:CGRectMake(10, 200, [UIScreen mainScreen].bounds.size.width - 20, 250)];

NSString *temp = @"注：本工具测试结果为一周内平均每天盐的摄入量为____毫升；问题中涉及的食物均以一人份为准；本软件更适用于成人；建议您及您的家人使用低钠盐____本软件更适用于成人";

// NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:temp];

NSString *actionStr = @"____";

NSMutableAttributedString *attrStr =  [temp keyWords:actionStr withKeyWordsColor:[UIColor redColor]];

// NSRange range = [temp rangeOfString:actionStr];
// NSLog(@"range%@",NSStringFromRange(range));
NSArray *actionArr = [self rangeOfSubString:actionStr inString:temp];
NSLog(@"===:%@",[self rangeOfSubString:actionStr inString:temp]);
for (int i = 0; i < actionArr.count; i++) {
NSValue *value = actionArr[i];
NSRange actionRange = [value rangeValue];
[attrStr addAttribute:NSLinkAttributeName
value:actionStr
range: actionRange];
}

[attrStr addAttribute:NSFontAttributeName
                value:[UIFont systemFontOfSize:20]
                range:NSMakeRange(0, attrStr.length)];

__block GHAttributesLabel *weakLabel = attributesLabel;
NSMutableDictionary *titleDict = [NSMutableDictionary dictionary];

attributesLabel.actionBlock = ^(NSRange poinRange) {
    NSLog(@"poinRange%@",NSStringFromRange(poinRange));
    __block NSString *titleStr;
  NSString *properTitle = [titleDict objectForKey:[NSString stringWithFormat:@"%lu",(unsigned long)poinRange.location]];
    
    TextInputViewController *inputVC = [self inputVCWithProperty:properTitle NavName:@"请输入"];
    inputVC.maxCount = 200;
    inputVC.GetText = ^(NSString *title){
        titleStr = title.length ? title : @"____";
        [titleDict setValue:titleStr forKey:[NSString stringWithFormat:@"%lu",(unsigned long)poinRange.location]];
        
        NSRange contentRange = {poinRange.location,[title length]};
        [attrStr replaceCharactersInRange:poinRange withString:title];
        
        [attrStr addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:contentRange];
            
        weakLabel.attributedText = attrStr;
        [weakLabel setAttributesText:attrStr actionText:actionStr];

    };
};
[attributesLabel setAttributesText:attrStr actionText:actionStr];

[self.view addSubview:attributesLabel];

}

• (NSArray)rangeOfSubString:(NSString)subStr inString:(NSString*)string {
  NSMutableArray *rangeArray = [NSMutableArray array];
  NSString *string1 = [string stringByAppendingString:subStr];
  NSString *temp;
  for(int i =0; i < string.length; i ++) {
  temp = [string1 substringWithRange:NSMakeRange(i, subStr.length)];
  if ([temp isEqualToString:subStr]) {
  NSRange range = {i,subStr.length};
  [rangeArray addObject: [NSValue valueWithRange:range]];
  }

}
return rangeArray;
}

-(NSMutableAttributedString *)keyWords:(NSString *)keyWords withKeyWordsColor:(UIColor *)color
{

NSMutableAttributedString *mutableAttributedStr = [[NSMutableAttributedString alloc] initWithString:self];
if (color == nil) {
    color = [UIColor colorWithHexString:@"52c683"];
}

if (keyWords.length<=0) {
     return mutableAttributedStr;
}

for (NSInteger j=0; j<=keyWords.length-1; j++) {
    
    NSRange searchRange = NSMakeRange(0, [self length]);
    NSRange range;
    NSString *singleStr = [keyWords substringWithRange:NSMakeRange(j, 1)];
    while
        ((range = [self rangeOfString:singleStr options:0 range:searchRange]).location != NSNotFound) {
            //改变多次搜索时searchRange的位置
            searchRange = NSMakeRange(NSMaxRange(range), [self length] - NSMaxRange(range));
            //设置富文本
            [mutableAttributedStr addAttribute:NSForegroundColorAttributeName value:color range:range];
            
        }
}

return mutableAttributedStr;

}