UITextView在'完成'上辞职第一响应者

Question

我一直在网上搜索大约一个小时,但找不到任何代码来帮助我.

我有一个UITextView,我需要辞职,当用户按键盘上的"完成"按钮的第一个响应者.

我看到代码在互联网上漂浮如下:

-(BOOL) textFieldShouldReturn:(UITextField *)textField {
 [textField resignFirstResponder];
 return NO;
}

但那不适用于UITextView.简单地说,我怎么知道用户何时按下键盘上的完成按钮？

Answer 1

实现 shouldChangeTextInRange:委托方法.

使用以下方法,解决方案仅适用于@"\n"(新行字符).

//In you *.h file make sure you add
@interface v1ViewController : UIViewController <UITextViewDelegate>

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    myTextField.delegate = self;
}

    - (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range 
          replacementText:(NSString *)text
        {

            if ([text isEqualToString:@"\n"]) {

                [textView resignFirstResponder];
                // Return FALSE so that the final '\n' character doesn't get added
                return NO;
            }
            // For any other character return TRUE so that the text gets added to the view
            return YES;
    }