在 Cocoa/objective-c 中单击 Target 时，操作会被调用两次（鼠标向上/向下）

发布于 2024-10-22 09:24:51 字数 626 浏览 3 评论 0原文

我有一个 NSDatePicker （目标）和 datePickerAction （动作）

- (IBAction)datePickerAction:(id)sender
{

    if( [[[NSApplication sharedApplication] currentEvent] modifierFlags] & 
       NSShiftKeyMask )
        NSLog(@"shift pressed %@", [datePicker dateValue]);

    else
        NSLog(@"hello %@", [datePicker dateValue]);

}

当我单击 NSDatePicker 对象中的日期时，该方法（动作）被调用，问题是该方法被调用两次 - 鼠标向下/向上。

我可以让该方法只调用一次（向上或向下）吗？

编辑

我只有要选择的方法。

在此处输入图像描述

这是连接检查器。在此处输入图像描述

原文

I have a NSDatePicker (target), and datePickerAction (action)

- (IBAction)datePickerAction:(id)sender
{

    if( [[[NSApplication sharedApplication] currentEvent] modifierFlags] & 
       NSShiftKeyMask )
        NSLog(@"shift pressed %@", [datePicker dateValue]);

    else
        NSLog(@"hello %@", [datePicker dateValue]);

}

It works well as when I click a date in NSDatePicker object, the method(action) is called, the problem is that the method is called twice - mouse down/up.

Can I make the method called only once (up or down)?

EDIT

I only have the method to be selected.

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And this is connection inspector.
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孤千羽 2024-10-29 09:24:51

不幸的是，我认为您无法在 Interface Builder 中以这种方式设置 NSDatePicker （或具体而言，NSDatePickerCell），而必须以编程方式进行设置。

这是一个对我来说效果很好的解决方法：

- (void)awakeFromNib
{
    // Assuming @property (assign) IBOutlet NSDatePickerCell *pickerCell;
    [self.pickerCell sendActionOn:NSLeftMouseDown]; // or NSLeftMouseUp or what have you...
}

请注意，您不能在这里使用NSLeftMouseDownMask！（嗯，当然你可以......但这没有帮助。）

Unfortunately, I think you cannot set NSDatePicker (or NSDatePickerCell, to be specific) up this way in Interface Builder, but instead have to do it programmatically.

Here's a workaround that performs fine for me:

- (void)awakeFromNib
{
    // Assuming @property (assign) IBOutlet NSDatePickerCell *pickerCell;
    [self.pickerCell sendActionOn:NSLeftMouseDown]; // or NSLeftMouseUp or what have you...
}

Note that you cannot use NSLeftMouseDownMask here! (Well, of cause you can...but it won't help.)

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