-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
    if([text isEqualToString:@"\n"])
        [textView resignFirstResponder];
    return YES;
}

yourtextView.delegate=self;

还要添加UITextViewDelegate

别忘了确认协议

如果你没有添加IF ([text isEqualToString:@"\n"])，你就不能编辑

用另一种方法解决了这个问题。

Create a button that will be placed in the background From the Attribute Inspector, change the button type to custom, and the makes the button transparent. Expand the button to cover the whole view, and make sure the button is behind all the other object. Easy way to do this is to drag the button to the top of list view in the View Control drag the button to the viewController.h file and create an action (Sent Event: Touch Up Inside) like : (IBAction)ExitKeyboard:(id)sender; In ViewController.m should look like : (IBAction)ExitKeyboard:(id)sender { [self.view endEditing:TRUE]; } Run app, and when you click away from the TextView, the keyboard disappears

试试这个:

 - (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
    if ([text isEqualToString:@"\n"]) {
        [self.view endEditing:YES];
    }

    return YES;

}

在使用uitextview时还有另一个解决方案， 你可以添加工具栏作为InputAccessoryView在“textViewShouldBeginEditing”，并从这个工具栏的完成按钮，你可以解雇键盘，这是如下代码:

在viewDidLoad

toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)]; //toolbar is uitoolbar object
toolBar.barStyle = UIBarStyleBlackOpaque;
UIBarButtonItem *btnDone = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(btnClickedDone:)];
[toolBar setItems:[NSArray arrayWithObject:btnDone]];

在textviewdelegate方法

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
     [textView setInputAccessoryView:toolBar];
     return YES;
}

在操作按钮完成，这是在工具栏如下:

-(IBAction)btnClickedDone:(id)sender
{
    [self.view endEditing:YES];
}

斯威夫特

func textView(textView: UITextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool {
    if text == "\n" {
        textView.resignFirstResponder()
    }
    return true
}

好的。每个人都用技巧给出了答案，但我认为实现这一点的正确方法是

将以下操作连接到接口生成器中的“Did End On Exit”事件。 (右键单击TextField并从“Did end on exit”中cntrl-drag到以下方法。

-(IBAction)hideTheKeyboard:(id)sender
{
    [self.view endEditing:TRUE];
}