显示系统键盘Mac应用程序？ [英] Display System Keyboard Mac application?

问题描述

如果在我的应用程序中选择了任何文本输入字段，我需要显示系统键盘。我似乎找不到任何资源如何做到这一点。任何提示？

I need to display the system keyboard if any text entry fields are selected with in my app. I can't seem to find any resources on how to do this. Any tips?

编辑：我问这个问题，因为我是一个全屏应用程序，需要根据用户选择显示/隐藏。

I'm asking this question because I'm making a full screen application and need to show/hide based on user selection.

感谢，

Teja

Thanks,
Teja

推荐答案

你不能找到的信息是，它是一个C API，它不在可可。您需要使用的API是文本输入源服务。请尝试此示例：

The reason why you can't find the info is that it's a C API and it's not in Cocoa. The API you need to use is Text Input Sources Services. Try this sample:

#import <Foundation/Foundation.h>
#import <Carbon/Carbon.h>

int main(){
    NSAutoreleasePool*pool=[[NSAutoreleasePool alloc] init];
    NSDictionary*property=[NSDictionary dictionaryWithObject:(NSString*)kTISTypeKeyboardViewer
                                                      forKey:(NSString*)kTISPropertyInputSourceType];
    NSArray*tisArray=(NSArray*)TISCreateInputSourceList((CFDictionaryRef)property,NO);
    // tisArray usually only contains just one keyboard viewer
    // in a rare case the user might have another viewer installed, beware
    TISInputSourceRef keyboardViewer=(TISInputSourceRef)[tisArray objectAtIndex:0];
    TISSelectInputSource(keyboardViewer);
    CFRelease((CFTypeRef)tisArray);
    [pool drain];
    return 0;
}

这是一个Core Foundation类型的API，所以如果你知道Cocoa的用法是类似; Core Foundation基本上是一个用于 NSObject 的C API。大部分情况下，您可以使用免费桥接功能，请参阅此SO问题。当您在垃圾收集环境中保留/释放它们时，您需要小心。 TIS在10.5中引入;我不知道为什么苹果当时没有介绍它作为一个Cocoa API。
显然他们没有想出处理64bit碳。

It's a Core Foundation-type API, so if you know Cocoa the usage is similar; Core Foundation is basically a C API for NSObjects. Mostly you can use toll-free bridging, see this SO question. You need to be careful when you retain/release them in a garbage-collected environment. TIS was introduced in 10.5; I don't know why Apple didn't introduce it as a Cocoa API back then. Apparently they hadn't made up their mind to dispose of 64bit Carbon then.

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