需要一个能够检测iPhone插入时间的API

时间:2011-09-04 19:40:42

标签: iphone objective-c ios macos

我正在为Mac制作应用程序,我需要一个能够检测到iPhone插入的API。谢谢。

编辑:为了澄清,具体来说,我需要一个能够检测iPhone何时插入Mac上的USB端口的API。

1 个答案:

答案 0 :(得分:6)

我没有完整的答案,但是实现你想要的程序是USB Prober,随Xcode提供,位于/Developer/Applications/Utilities/USB Prober.app。该程序是开源的,浏览器可查看的存储库为here,整个项目包含在this download中。实际上我发现旧版本更有用,可用here,尤其是BusProbeClass

他们都依赖于IOKit,Apple的文档似乎在数量和质量上都非常缺乏。

这是一个沉重的阅读,但是如果你查看+ USBProbe,那么你会看到它获得当前USB设备的列表,在变量IOUSBDeviceInterface中为每个设备获取deviceIntf,然后将它们推送到对程序其余部分有用的地方。如果您在同一源文件中查看+ outputDevice: locationID:deviceNumber:更低版本,您会看到GetDescriptor似乎可以在IOUSBDeviceDescriptor上使用,以获取包含供应商和产品ID在内的属性,组合其中USB实施者论坛保证其独一无二。

使用供应商和产品ID,您可以搜索任何特定的USB设备。从我的Mac系统信息我可以告诉你,iPhone 4的产品ID为0x1297,Apple的供应商ID为0x05ac。

额外:从解剖代码开始,如果你删除了一大堆检查,事情正在成功并将其全部压缩到示范性的东西,那么以下至少是对现在是否插入iPhone 4的测试(你'我需要链接到Foundation和IOKit框架):

#include <stdio.h>
#import <Foundation/Foundation.h>
#import <IOKit/usb/IOUSBLib.h>
#import <IOKit/IOCFPlugIn.h>
#import <mach/mach_port.h>

int main (int argc, const char * argv[])
{
    // get the port through which to talk to the kernel
    mach_port_t masterDevicePort;
    IOMasterPort(MACH_PORT_NULL, &masterDevicePort);

    // create a dictionary that describes a search
    // for services provided by USB
    CFDictionaryRef matchingDictionary = IOServiceMatching(kIOUSBDeviceClassName);

    // get an iterator for all devices that match
    // the dictionary
    io_iterator_t deviceIterator;
    IOServiceGetMatchingServices(
            masterDevicePort,
            matchingDictionary,
            &deviceIterator);

    // iterate through the iterator...
    io_service_t ioDevice;
    while((ioDevice = IOIteratorNext(deviceIterator)))
    {
        IOUSBDeviceInterface **deviceInterface = NULL;
        IOCFPlugInInterface **ioPlugin = NULL;
        SInt32 score;

        // get a pointer to the device, stored to ioPlugin
        IOCreatePlugInInterfaceForService(
            ioDevice,
            kIOUSBDeviceUserClientTypeID,
            kIOCFPlugInInterfaceID,
            &ioPlugin,
            &score);

        // ask the device for its interface
        (*ioPlugin)->QueryInterface(
            ioPlugin, 
            CFUUIDGetUUIDBytes(kIOUSBDeviceInterfaceID),
            (void *)&deviceInterface);

        // make and issue a request to get the device descriptor
        IOUSBDeviceDescriptor deviceDescriptor;
        IOUSBDevRequest request;

        request.bmRequestType = USBmakebmRequestType(kUSBIn, kUSBStandard, kUSBDevice);
        request.bRequest = kUSBRqGetDescriptor;
        request.wValue = kUSBDeviceDesc << 8;
        request.wIndex = 0;
        request.wLength = sizeof(deviceDescriptor);
        request.pData = &deviceDescriptor;

        (*deviceInterface)->DeviceRequest(deviceInterface, &request);

        // now we have the device descriptor, do a little cleaning up -
        // release the interface and the device
        (*deviceInterface)->Release(deviceInterface);
        IOObjectRelease(ioDevice);

        // ensure that the values returned are in the appropriate
        // byte order for this platform
        CFSwapInt16LittleToHost(deviceDescriptor.idVendor);
        CFSwapInt16LittleToHost(deviceDescriptor.idProduct);

        // check whether we have an iPhone 4 attached
        if(deviceDescriptor.idVendor == 0x05ac && deviceDescriptor.idProduct == 0x1297)
            printf("iPhone 4 is connected!");
    }

    // clean up by releasing the device iterator
    // and returning the communications port
    IOObjectRelease(deviceIterator);
    mach_port_deallocate(mach_task_self(), masterDevicePort);

    return 0;
}

我还没有想出如何观察插件设备的变化。