UITextView 在“完成”时放弃第一响应者；

发布于 2024-11-16 04:36:01 字数 318 浏览 4 评论 0原文

我已经在网上搜索了大约一个小时，但找不到任何代码来帮助我解决这个问题。

我有一个 UITextView，当用户按下键盘上的“完成”按钮时，我需要放弃第一响应者。

我见过这样的代码在互联网上流传：

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

但这不适用于 UITextView。简单地说，如何判断用户何时按下键盘上的完成按钮？

原文

I have been searching around the web for about an hour now, and cannot find any code to help me with this.

I have a UITextView that I need to resign first responder of when the user presses the 'Done' button on their keyboard.

I have seen code floating around the internet like this:

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

But that will not work for a UITextView.
Simply put,
How can I tell when the user presses the done button on the keyboard?

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桃扇骨 2024-11-23 04:36:02

您可以使用委托方法

- (void)textViewDidEndEditing:(UITextView *)textView { 
    [textView resignFirstResponder];
}

您必须将控制器设置为 TextView 的委托。
有关更多方法，您可以查看这里： http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UITextViewDelegate_Protocol/Reference/UITextViewDelegate.html%23//apple_ref/doc/uid/TP40006897

You can use the delegate method

- (void)textViewDidEndEditing:(UITextView *)textView { 
    [textView resignFirstResponder];
}

You have to set your controller as the delegate for the TextView.
For more methods you can have a look here: http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UITextViewDelegate_Protocol/Reference/UITextViewDelegate.html%23//apple_ref/doc/uid/TP40006897

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今天小雨转甜 2024-11-23 04:36:01

实现 shouldChangeTextInRange: 委托方法。

使用以下方法，该解决方案仅适用于 @"\n" （换行符）。

//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;
    }

Implement the shouldChangeTextInRange: delegate method.

Use below approach and the solution work only with @"\n" (new line character).

//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;
    }

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