macos - OSX 将文本(不是文件)拖放到应用程序停靠图标

Question

我想在用户将文本(不是包含文本的文件)拖放到我的应用程序的停靠图标时进行处理。我该怎么做？

Answer 1

接受拖放到 Dock 图标上的文本的最简单方法是实现接受文本的服务。

在您的 Info.plist 中:

<dict>
    <key>NSMenuItem</key>
    <dict>
        <key>default</key>
        <string>Search in HoudahSpot</string>
    </dict>
    <key>NSMessage</key>
    <string>search</string>
    <key>NSPortName</key>
    <string>HoudahSpot</string>
    <key>NSRequiredContext</key>
    <dict>
        <key>NSServiceCategory</key>
        <string>public.text</string>
    </dict>
    <key>NSSendTypes</key>
    <array>
        <string>NSStringPboardType</string>
    </array>
    <key>Service description</key>
    <string>Starts a HoudahSpot search for the selected text</string>
</dict>

在您的应用程序委托(delegate)中:

- (void)awakeFromNib
{
    [NSApp setServicesProvider:self];
}

- (void)search:(NSPasteboard *)pboard userData:(NSString *)data error:(NSString **)error
{
    NSArray *types = [pboard types];

    if ([types containsObject:NSStringPboardType]) {
        NSString *searchString = [pboard stringForType:NSStringPboardType];

        NSLog(@"%@", searchString);
    }
}

您还可以通过在 -applicationWillFinishLaunching 中注册来捕获该事件:

NSAppleEventManager     *appleEventManager  = [NSAppleEventManager sharedAppleEventManager];

    [appleEventManager setEventHandler:self
                           andSelector:@selector(handleOpenContentsEvent:withReplyEvent:)
                         forEventClass:kCoreEventClass
                            andEventID:kAEOpenContents];

并处理它:

- (void)handleOpenContentsEvent:(NSAppleEventDescriptor *)event withReplyEvent:(NSAppleEventDescriptor *)replyEvent
{
    NSString *string = [[event paramDescriptorForKeyword:keyDirectObject] stringValue];

    NSLog(@"%@", string);
}

您仍然需要在 Info.plist 中声明一项服务才能接受 drop。