检查是否存在Mac OS X应用程序

Question

我记得有一个Cocoa框架或AppleScript字典来检查计算机上的任何地方是否安装了具有特定名称的Application包.

我该怎么做呢？Cocoa,AppleScript或命令行对我都很有用.

Answer 1

您应该使用Launch Services来执行此操作,特别是该功能LSFindApplicationForInfo().

你这样使用它:

#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);