iOS中UITextField实现过滤选中状态拼音的代码

 _searchTextField = [[UITextField alloc]initWithFrame:CGRectMake(20, 100, kScreenWidth-40, 50)];
 _searchTextField.delegate = self;
 _searchTextField.backgroundColor = [UIColor orangeColor];
 _searchTextField.placeholder = @"输入基金，快速定位";
 _searchTextField.returnKeyType = UIReturnKeyDone;
 _searchTextField.clearButtOnMode= UITextFieldViewModeWhileEditing;
 [_searchTextField addTarget:self action:@selector(searchTextFieldChanges:) forControlEvents:UIControlEventEditingChanged];
 [self.view addSubview:_searchTextField];
- (void)searchTextFieldChanges:(UITextField *)textField{
 if (textField.markedTextRange == nil) {
  NSLog(@"选中了汉字之后出现的汉字:%@", textField.text);
 }
}