如何在Mac OS X中使用显示ID获取显示名称？ [英] How to Get the Display Name with the Display ID in Mac OS X?

问题描述

我想知道您是否可以通过在Mac OS X（10.5）中使用显示ID 号码来帮助我找出如何逐步获取显示器的显示名称 ？一个要求是如果我给一个函数的显示ID，它将提供显示名称作为回报（或反之亦然）。

I was wondering if you could help me figure out how to progmatically get the Display Name for a monitor by using its Display ID number in Mac OS X (10.5)? A requirement is if I give a function the Display ID, it'll provide the Display Name in return (or vice versa).

显示名称看起来像这样：Color LCD，SAMSUNG

Display Name looks something like this: "Color LCD", "SAMSUNG"

显示ID看起来像这样：69671872，893830283

Display ID looks something like this: "69671872", "893830283"

NSScreen 获取显示器的显示ID号。似乎没有一个方法来获取显示名称。不好了！这里是NSScreen的代码获取显示ID：

NSScreen in Cocoa (Obj-C), or CGGetActiveDisplayList in Quartz (C), allow you to get the Display ID number for a monitor. Neither appear to have a method to get the Display Name. Oh no! Here's the code for NSScreen to get the Display ID:

NSArray *screenArray = [NSScreen screens];
NSDictionary *screenDescription = [[screenArray objectAtIndex:0] deviceDescription];
NSLog(@"Device ID: %@", [screenDescription objectForKey:@"NSScreenNumber"]);

System Profiler strong> ，系统偏好设定，显示名称，而非显示ID。

System Profiler, and Displays under System Preferences, reference displays by Display Name, not Display ID.

一个AppleScript，它需要显示名称而不是显示ID。任何帮助是不胜感激！ ：）

I'm asking as I want to run an AppleScript, and it requires a Display Name rather than a Display ID. Any help is MUCH appreciated! :)

推荐答案

这将提供本地化的显示名称：

This gives you the localized display name:

static void KeyArrayCallback(const void* key, const void* value, void* context) { CFArrayAppendValue(context, key);  }

- (NSString*)localizedDisplayProductName
{
    NSDictionary* screenDictionary = [[NSScreen mainScreen] deviceDescription];
    NSNumber* screenID = [screenDictionary objectForKey:@"NSScreenNumber"];
    CGDirectDisplayID aID = [screenID unsignedIntValue];            
    CFStringRef localName = NULL;
    io_connect_t displayPort = CGDisplayIOServicePort(aID);
    CFDictionaryRef dict = (CFDictionaryRef)IODisplayCreateInfoDictionary(displayPort, 0);
    CFDictionaryRef names = CFDictionaryGetValue(dict, CFSTR(kDisplayProductName));
    if(names)
    {
        CFArrayRef langKeys = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks );
        CFDictionaryApplyFunction(names, KeyArrayCallback, (void*)langKeys);
        CFArrayRef orderLangKeys = CFBundleCopyPreferredLocalizationsFromArray(langKeys);
        CFRelease(langKeys);
        if(orderLangKeys && CFArrayGetCount(orderLangKeys))
        {
            CFStringRef langKey = CFArrayGetValueAtIndex(orderLangKeys, 0);
            localName = CFDictionaryGetValue(names, langKey);
            CFRetain(localName);
        }
        CFRelease(orderLangKeys);
    }
    CFRelease(dict);
    return [(NSString*)localName autorelease];
}

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