cocoa - 检查 Mac OS X 应用程序是否存在

Question

我记得有一个 Cocoa 框架或 AppleScript 字典来检查计算机上的任何位置是否安装了具有特定名称的应用程序包。

我该怎么做？ Cocoa、AppleScript 或命令行对我来说都很有用。

Answer 1

您应该使用Launch Services为此，特别是函数 LSFindApplicationForInfo()。

你像这样使用它:

#import <ApplicationServices/ApplicationServices.h>

CFURLRef appURL = NULL;
OSStatus result = LSFindApplicationForInfo (
                                   kLSUnknownCreator,         //creator codes are dead, so we don't care about it
                                   CFSTR("com.apple.Safari"), //you can use the bundle ID here
                                   NULL,                      //or the name of the app here (CFSTR("Safari.app"))
                                   NULL,                      //this is used if you want an FSRef rather than a CFURLRef
                                   &appURL
                                   );
switch(result)
{
    case noErr:
        NSLog(@"the app's URL is: %@",appURL);
        break;
    case kLSApplicationNotFoundErr:
        NSLog(@"app not found");
        break;
    default:
        NSLog(@"an error occurred: %d",result);
        break;          
}

//the CFURLRef returned from the function is retained as per the docs so we must release it
if(appURL)
    CFRelease(appURL);