1、导入依赖头文件
#include <IOKit/hid/IOHIDLib.h> 2、初始化IOHIDManager IOHIDManagerRef managerRef = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone); 3、进行配对设置，可以过滤其他USB设备。 1）无配对设备 IOHIDManagerSetDeviceMatching(HIDManager, NULL); 2）单类设备配对 NSMutableDictionary* dict= [NSMutableDictionary dictionary]; [dict setValue:pid forKey:[NSString stringWithCString:kIOHIDProductIDKey encoding:NSUTF8StringEncoding]]; [dict setValue:vid forKey:[NSString stringWithCString:kIOHIDVendorIDKey encoding:NSUTF8StringEncoding]]; IOHIDManagerSetDeviceMatching(managerRef, (__bridge CFMutableDictionaryRef)dict); 3）多种设备配对设置 NSMutableArray *arr = [NSMutableArray array]; [arr addObject:dict]; IOHIDManagerSetDeviceMatchingMultiple(managerRef, (__bridge CFMutableArrayRef)arr); 4、注册插拔设备的callback //注册插入callback IOHIDManagerRegisterDeviceMatchingCallback(managerRef, &Handle_DeviceMatchingCallback, NULL); //注册拔出callback IOHIDManagerRegisterDeviceRemovalCallback(managerRef, &Handle_DeviceRemovalCallback, NULL); 5、加入RunLoop IOHIDManagerScheduleWithRunLoop(managerRef, CFRunLoopGetMain(), kCFRunLoopDefaultMode); 6、打开IOHIDManager IOReturn ret = IOHIDManagerOpen(managerRef, kIOHIDOptionsTypeNone); if (ret == kIOReturnSuccess) { NSLog(@"IOHIDManager打开成功"); } 7、实现插拔callback static void Handle_DeviceMatchingCallback(void *inContext,IOReturn inResult,void *inSender,IOHIDDeviceRef inIOHIDDeviceRef) { NSLog(@"插入：%p",(void *)inIOHIDDeviceRef); } static void Handle_DeviceRemovalCallback(void *inContext,IOReturn inResult,void *inSender,IOHIDDeviceRef inIOHIDDeviceRef) { NSLog(@"拔出：%p设备",(void *)inIOHIDDeviceRef); } 8、插入设备获取到IOHIDDeviceRef inIOHIDDeviceRef后，打开IOHIDDeviceRef。 IOOptionBits options = 0; IOReturn ret = IOHIDDeviceOpen(inIOHIDDeviceRef,options); if (ret == kIOReturnSuccess) { NSLog(@"打开成功"); } 9、注册的接收数据callback。 IOHIDDeviceRegisterInputReportCallback(inIOHIDDeviceRef, (uint8_t*)inputbuffer, 64, MyInputCallback, NULL); 10、实现接收数据callback方法，即可接收数据。 static void MyInputCallback(void* context, IOReturn result, void* sender, IOHIDReportType type, uint32_t reportID, uint8_t *report,CFIndex reportLength) { RobotPenUSBLog(@"%s",report); } 11、向USB设备发送指令。 IOReturn ret = IOHIDDeviceSetReport(inIOHIDDeviceRef, kIOHIDReportTypeOutput, 0, (uint8_t*)buffer, length); if (ret != kIOReturnSuccess) { NSLog(@"指令发送失败"); } 12、断开设备 IOReturn ret = IOHIDDeviceClose(inIOHIDDeviceRef,0L); if (ret == kIOReturnSuccess) { NSLog(@"断开成功"); }