Question

UITextView如何在编辑时识别#号标记

Answer 1

解决方案:

`#import "SecondTabVC.h"

@interface SecondTabVC ()

@property (nonatomic, strong) UIScrollView *contentScrollView;//内容scrollView

@property (nonatomic, strong) UITextView *descripTextField;//描述

@property (nonatomic, assign) NSRange markRange;//标签range

@end

@implementation SecondTabVC

• (void)viewDidLoad {
  [super viewDidLoad];
  self.title = @"SecondTab";
  self.view.backgroundColor = GreenColor;

  self.markRange = NSMakeRange(0, 0);

  self.descripTextField = [UITextView new];
  self.descripTextField.delegate = self;
  self.descripTextField.backgroundColor = WhiteColor;
  self.descripTextField.font = Font(20);
  self.descripTextField.textColor = BlackColor;
  [self.view addSubview:self.descripTextField];

  [self.descripTextField mas_makeConstraints:^(MASConstraintMaker *make) {
  make.edges.equalTo(self.view).insets(UIEdgeInsetsMake(100, 0, 100, 0));
  }];

}

pragma mark - UITextViewDelegate -

• (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
  {
  if ([text isEqualToString:@"#"]) {
  NSLog(@"%@",NSStringFromRange(range));
  }
  return YES;
  }

• (void)textViewDidChange:(UITextView *)textView
  {
  if (textView.text.length < 10) {
  NSMutableAttributedString *attribute = [[NSMutableAttributedString alloc] initWithString:textView.text];
  [attribute addAttribute:NSForegroundColorAttributeName value:GreenColor range:NSMakeRange(0, textView.text.length - 1)];
  [attribute addAttribute:NSFontAttributeName value:Font(20) range:NSMakeRange(0, textView.text.length-1)];
  textView.attributedText = attribute;
  }
  }