Question

我想在NSOpenPanel添加一个复选框，然后在收到所选文件时查询其状态。我怎么能这样做？

此外，希望能够根据当前文件选择启用或禁用复选框。

Answer 1

基于Joshua Nozzi和Mark Alldritt答案的完整解决方案：

NSOpenPanel* openDlg = [NSOpenPanel openPanel];
NSButton *button = [[NSButton alloc] init];
[button setButtonType:NSSwitchButton];
button.title = NSLocalizedString(@"I am a checkbox", @"");
[button sizeToFit];
[openDlg setAccessoryView:button];
openDlg.delegate = self;
[openDlg beginSheetModalForWindow:self.window completionHandler:^(NSInteger result) 
{
    openDlg.delegate = nil; // TODO: Check if this is necessary
    if (result != NSFileHandlingPanelOKButton) return;
    BOOL checkboxOn = (((NSButton*)openDlg.accessoryView).state == NSOnState); 
    // Do something
}];

NSOpenSavePanelDelegate：

- (void)panelSelectionDidChange:(id)sender {
    NSOpenPanel *panel = sender;
    NSButton *button = (NSButton*)panel.accessoryView;
    // Update button based on panel selection
}

Answer 2

NSOpenPanel是NSSavePanel的子类，它有-setAccessoryView:。

Answer 3

要根据所选文件验证您的复选框，您需要从panelSelectionDidChange:委托协议实施NSOpenSavePanelDelegate。然后，您可以查询打开面板的当前选定文件，并根据需要更新复选框状态。

添加复选框到NSOpenPanel

3 个答案: