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如何使用同一按钮隐藏和显示键盘

发布于 2024-11-07 07:23:50 字数 175 浏览 1 评论 0原文

我有 UITextField 当应用程序启动时它成为FirstResponder。然后，我有一个 UIButton ，按下它时 resignFirstResponder 。

如何用同一个按钮隐藏和显示键盘？是否可以？

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挖个坑埋了你 2024-11-14 07:23:50

根据您的需求，以下代码应该具有相同的按钮，既隐藏又显示文本字段的键盘

if ([textField isFirstResponder]) {
    [textField resignFirstResponder];
} else {
    [textField becomeFirstResponder];
}

edit
~~您还可以在 if 循环中输入代码来更改按钮的标题。~~
放置更改按钮标题的代码的适当位置应位于 textField 的委托方法 -textFieldDidBeginEditing: 和 -textFieldDidEndEditing: 中

Based on what you seem to need, the following code should have the same button both hide and show the keyboard for the textField

if ([textField isFirstResponder]) {
    [textField resignFirstResponder];
} else {
    [textField becomeFirstResponder];
}

edit
~~You can also put in code to alter the title of the button in the if loop.~~
The appropriate place to put the code to alter the title of the button would in the textField's delegate methods -textFieldDidBeginEditing: and -textFieldDidEndEditing:

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一身软味 2024-11-14 07:23:50

-(IBAction) buttonPressed:(id) sender {
        UIButton *button = (UIButton *) sender;
        button.selected = !button.selected;
        if (button.selected) {
            // show the keyboard.
            [textField becomeFirstResponder];
        }else {
            // Hide the keyboard.
            [textField resignFirstResponder];
        }
}

-(IBAction) buttonPressed:(id) sender {
        UIButton *button = (UIButton *) sender;
        button.selected = !button.selected;
        if (button.selected) {
            // show the keyboard.
            [textField becomeFirstResponder];
        }else {
            // Hide the keyboard.
            [textField resignFirstResponder];
        }
}

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看海 2024-11-14 07:23:50

mytest.h

IBOutlet UITextField *myTextField;
IBOutlet UIButton *myButton

- (IBAction) showHideKeyBoard:(id)sender;

mytest.m

-(IBAction) showHideKeyBoard:(id) sender {

        if (myButton.selected) {
            // show the keyboard.
            [myTextField becomeFirstResponder];
            [myButton setTitle:@"Hide" forState:UIControlStateNormal];
            myButton.selected = NO;
        }else {
            // Hide the keyboard.
            [myTextField resignFirstResponder];
            [myButton setTitle:@"Show" forState:UIControlStateNormal];
            myButton.selected = YES;
        }
}

mytest.h

IBOutlet UITextField *myTextField;
IBOutlet UIButton *myButton

- (IBAction) showHideKeyBoard:(id)sender;

mytest.m

-(IBAction) showHideKeyBoard:(id) sender {

        if (myButton.selected) {
            // show the keyboard.
            [myTextField becomeFirstResponder];
            [myButton setTitle:@"Hide" forState:UIControlStateNormal];
            myButton.selected = NO;
        }else {
            // Hide the keyboard.
            [myTextField resignFirstResponder];
            [myButton setTitle:@"Show" forState:UIControlStateNormal];
            myButton.selected = YES;
        }
}

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~没有更多了~