这个问题是关于这个问题的代码:Detect headphone button presses in OS X检测硬件耳机机在Mac
他们的答案被标记为正确,但我不能让他们的代码工作(这可能是因为我的知识缺乏的目标c)。我遵循他们的指示,并修改了三个文件。这是我曾尝试(我也看着苹果由于IOKit文件,但没有找到任何耳机硬件按钮文档):
AwesomeClass.h
#import <Cocoa/Cocoa.h>
#include "KeyboardPaneController.h"
@interface AwesomeClass : KeyboardPaneController
+ (NSArray *) allKeyboards;
- (void) initKeyboardElements: (NSArray *) elements;
- (void) ddhidQueueHasEvents: (DDHidQueue *) hidQueue;
@end
AwesomeClass.m
#import "AwesomeClass.h"
#import "DDHidLib.h"
@implementation AwesomeClass
+ (NSArray *) allKeyboards;
{
NSArray *array = [DDHidDevice allDevicesMatchingUsagePage: kHIDPage_Consumer
usageId: kHIDUsage_GD_Pointer
withClass: self
skipZeroLocations: NO];
//Only return "Apple Mikey HID Driver", if not found, return nil.
for (DDHidDevice *device in array) {
if ([[device productName] isEqualToString:@"Apple Mikey HID Driver"]) {
return [NSArray arrayWithObject:device];
}
}
return nil;
}
- (void) initKeyboardElements: (NSArray *) elements;
{
NSEnumerator * e = [elements objectEnumerator];
DDHidElement * element;
while (element = [e nextObject])
{
unsigned usagePage = [[element usage] usagePage];
unsigned usageId = [[element usage] usageId];
if (usagePage == kHIDPage_GenericDesktop)
{
if ((usageId >= 0x89) && (usageId <= 0x8D))
{
[mKeyElements addObject: element];
}
}
NSArray * subElements = [element elements];
if (subElements != nil)
[self initKeyboardElements: subElements];
}
}
- (void) ddhidQueueHasEvents: (DDHidQueue *) hidQueue;
{
DDHidEvent * event;
while ((event = [hidQueue nextEvent]))
{
DDHidElement * element = [self elementForCookie: [event elementCookie]];
unsigned usageId = [[element usage] usageId];
SInt32 value = [event value];
if (value == 1)
[self ddhidKeyboard: self keyDown: usageId];
}
}
@end
...以及在KeyboardPaneController.m中修改一行(在说明中显示)。由于缺乏框架文档,很难找到答案(海报已经脱机一年多了,所以我假设我可能不会得到回应)。代码在狮子身上进行了测试,我有山狮,所以这可能是问题。
我知道这是绝对有可能实现的,因为iTunes对我的耳机按键(这有点微妙)非常敏感。我希望能够使用耳机上的按钮而不是iTunes来控制Spotify。
'+ allKeyboards'返回'nil'还是找到了某些内容?名称,看看是否有一个看起来很有前途的名字,但与该代码预期的名称不同?(通常,您需要更清楚地了解该代码的失败原因)。 – 2013-03-16 21:52:45
我知道所有键盘都没有返回耳机或声卡,但我会看到正是allKeyboards返回并发布结果。 – alexy13 2013-03-16 22:53:02