Question

使用Mac OSX SDK，我编写了这个简单的测试应用程序，用于从正在运行的应用程序中提取版本字符串。

int main()
{
    NSWorkspace * ws = [NSWorkspace sharedWorkspace];
    NSArray * apps = [ws runningApplications];
    NSUInteger max= [apps count];
    for (NSUInteger i = 0; i < max; i++)
    {
        NSRunningApplication *app = [apps objectAtIndex: i];
        pid_t pid = [ app processIdentifier ];
        ProcessSerialNumber psn = { kNoProcess, kNoProcess };

        if ( GetProcessForPID(pid, &psn) != noErr )
            continue;

        CFDictionaryRef dictionary 
            = ProcessInformationCopyDictionary(&psn, kProcessDictionaryIncludeAllInformationMask);

        const NSString * version 
            = reinterpret_cast<const NSString*>(CFDictionaryGetValue( dictionary, CFSTR("CFBundleShortVersionString") ));

        printf( "version for pid %d: \"%s\"\n", pid, [ version UTF8String ] );
    }
}

但这不起作用，它会打印如下行：

pid 34的
版本：“（null）”

第二次尝试 如果我通过将最后两行改为：{/ p>来尝试检索CFBundleVersion，我会更接近

 const NSNumber * version
     = reinterpret_cast<const NSNumber *>(CFDictionaryGetValue( dictionary, CFSTR("CFBundleVersion") ));
 printf( "version for pid %d: \"%s\"\n", pid, [ [ version stringValue ] UTF8String ] );

但现在版本是一个整数，如257633863，我想要像1.23.0

Answer 1

阅读包的Info.plist词典可能更容易：

NSWorkspace *ws = [NSWorkspace sharedWorkspace];
NSArray *apps = [ws runningApplications];
for (NSRunningApplication *app in apps)
{
    pid_t pid = [app processIdentifier ];
    NSBundle *bundle = [NSBundle bundleWithURL:[app bundleURL]];
    NSDictionary *info = [bundle infoDictionary];

    NSString *name = info[@"CFBundleName"];
    NSString *identifier = info[@"CFBundleIdentifier"];
    NSString *version = info[@"CFBundleVersion"];
    NSString *shortVersion = info[@"CFBundleShortVersionString"];
    NSLog(@"PID: %ld, Name: %@, Identifier: %@, Version: %@ (%@)", (long)pid, name, identifier, version, shortVersion);
}

Answer 2

您可以使用此类方法检查特定的应用版本。

+(BOOL) isCorrectApp:(NSString*) appIdentifier forVersion: (NSString*) appVersion {
    NSWorkspace *ws = [NSWorkspace sharedWorkspace];
    NSArray *apps = [ws runningApplications];
    for (NSRunningApplication *app in apps)
    {
        NSBundle *bundle = [NSBundle bundleWithURL:[app bundleURL]];
        NSDictionary *info = [bundle infoDictionary];

        NSString *identifier = info[@"CFBundleIdentifier"];
        if ([identifier containsString:appIdentifier]) { // appIdentifier is com.apple.iTunesHelper or such

            NSString *name = info[@"CFBundleName"];
            NSString *version = info[@"CFBundleVersion"];
            NSString *shortVersion = info[@"CFBundleShortVersionString"];
            if ([version hasPrefix:appVersion]) {
                NSLog(@"Name: %@, Identifier: %@, Version: %@ (%@)", name, identifier, version, shortVersion);
            } else {
                // NSLog(@"Waiting for the right version.");
                return false;
            }
        }
    }
    return true;
}

在使用商业软件之前，请务必先测试一下。

如何检索应用程序的版本字符串？

2 个答案: