[iOS]使用UIActivityViewController实现AirDrop功能

AirDrop是iOS7中新增的一个近距离分享功能，两个相邻的iOS设备可以通过AirDrop实现传递图片、文件等功能，有了AirDrop基本上可抛弃类似Dropbox的ShareLink和PublicFolder功能。 iOS7的SDK中已经在UIActivityViewController中内置了AirDrop功能，使用时与分享到twitter和facebook的方式基本一致，只需要将需要传递的文件URL设置给UIActivityViewController对象的ActivityItems对象即可，区别在于：如果传递文件，那么URL应该是“file://”开头，而不是常见的“http://”开头 参考代码: NSString *filePath = "Documents/aaa.png"NSURL *url = [NSURL fileURLWithPath:filePath]; NSArray *items = [NSArray ArrayWithObjects:url,nil];UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];[self presentViewController:activityViewController animated:YES completion:nil]; 如果只想使用AirDrop而不使用其他分享功能，只需要设置UIActivityViewController的excludedActivityTypes属性即可。 以下是可以隐藏的对象 #6.0开始支持UIKIT_EXTERN NSString *const UIActivityTypePostToFacebook UIKIT_EXTERN NSString *const UIActivityTypePostToTwitter UIKIT_EXTERN NSString *const UIActivityTypePostToWeibo UIKIT_EXTERN NSString *const UIActivityTypeMessage UIKIT_EXTERN NSString *const UIActivityTypeMail UIKIT_EXTERN NSString *const UIActivityTypePrint UIKIT_EXTERN NSString *const UIActivityTypeCopyToPasteboard UIKIT_EXTERN NSString *const UIActivityTypeAssignToContact UIKIT_EXTERN NSString *const UIActivityTypeSaveToCameraRoll #7.0以后新增UIKIT_EXTERN NSString *const UIActivityTypeAddToReadingList UIKIT_EXTERN NSString *const UIActivityTypePostToFlickr UIKIT_EXTERN NSString *const UIActivityTypePostToVimeo UIKIT_EXTERN NSString *const UIActivityTypePostToTencentWeibo UIKIT_EXTERN NSString *const UIActivityTypeAirDrop 具体用法如下，这里只保留AirDrop： NSArray *excludedActivities = @[UIActivityTypePostToFacebook, UIActivityTypePostToTwitter, UIActivityTypePostToWeibo, UIActivityTypeMessage, UIActivityTypeMail, UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll, UIActivityTypeAddToReadingList, UIActivityTypePostToFlickr, UIActivityTypePostToVimeo, UIActivityTypePostToTencentWeibo]; activityViewController.excludedActivityTypes = excludedActivities; 完整的代码： NSString *filePath = "Documents/aaa.png"NSURL *url = [NSURL fileURLWithPath:filePath]; NSArray *items = [NSArray ArrayWithObjects:url,nil];UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil]; NSArray *excludedActivities = @[UIActivityTypePostToFacebook, UIActivityTypePostToTwitter, UIActivityTypePostToWeibo, UIActivityTypeMessage, UIActivityTypeMail, UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll, UIActivityTypeAddToReadingList, UIActivityTypePostToFlickr, UIActivityTypePostToVimeo, UIActivityTypePostToTencentWeibo]; activityViewController.excludedActivityTypes = excludedActivities; [self presentViewController:activityViewController animated:YES completion:nil]; 关于文件路径URL，一般APP的用户数据都在APP的Documents目录下，使用"Documents/aaa.png"的方式即可取得 如果需要使用Bundle路径下的文件可以使用以下方式 NSString *fileName=@"aaa.png"NSArray *fileComponents = [filename componentsSeparatedByString:@"."]; NSString *filePath = nil;if([fileComponents count] == 0) {}else if([fileComponents count] == 1) { filePath = [[NSBundle mainBundle] pathForResource:[fileComponents objectAtIndex:0] ofType:nil]; }else if([fileComponents count] == 2) { filePath = [[NSBundle mainBundle] pathForResource:[fileComponents objectAtIndex:0] ofType:[fileComponents objectAtIndex:1]]; }NSURL *url = [NSURL fileURLWithPath:filePath];