我想让用户使用任何能够处理图像的应用程序(即电子邮件,Facebook,Twitter等)分享他的照片,就像Android上的Intent一样.
我试图使用UIdocumentController,但它并不像官方的画廊那样显示Facebook或Twitter.这也使得我的应用程序在拍摄第二张照片后崩溃.
有没有简单的方法呢?我不会使用Facebook SDK等等.
这是我拍摄照片时所做的:
[stillimageOutput captureStillimageAsynchronouslyFromConnection:vIDeoConnection completionHandler: ^(CMSampleBufferRef imageSampleBuffer,NSError *error) { if(!error){ //Resize the picture and add the overlay UIImage *picture = [self imageFromSampleBuffer:imageSampleBuffer]; //Custom code letting me save the picture in a specific album [self.library saveImage:picture toAlbum:@"myApp" Metadata:Metadata withCompletionBlock:^(NSError *error,NSURL* assetURL) { if (error!=nil) { NSLog(@"Big error: %@",[error description]); } else { NSLog(@"Image Saved"); Nsstring *path = [[NSSearchPathForDirectorIEsInDomains(NSdocumentDirectory,NSUserDomainMask,YES) objectAtIndex:0] stringByAppendingPathComponent:@"tmp.jpg"]; //Only way to use UIdocumentController is to save the file at a kNown location NSData* imagedata = UIImageJPEGRepresentation(picture,0.9f); [imagedata writetofile:path atomically:NO]; NSLog(@"%@",path); docController.URL = [NSURL fileURLWithPath:path]; // This make my app crash after the second picture [docController presentPrevIEwAnimated:YES]; } }]; } else { NSLog(@"%@",error); } }];解决方法 iOS有一个内置的社交共享工具包.您可以通过电子邮件,Facebook和Twitter分享图片.但是,对于使用Google和其他社交服务,您将需要各自的SDK.
1)对于Facebook
SLComposeVIEwController *controller = [SLComposeVIEwController composeVIEwControllerForServiceType:SLServiceTypeFacebook]; [controller setinitialText:message]; [controller addImage:image]; [self presentVIEwController:controller animated:YES completion:Nil];
2)对于twitter替换SLServiceTypeFacebook与SLServiceTypeTwitter.
3)电子邮件
MFMailComposeVIEwController *emailShareController = [[MFMailComposeVIEwController alloc] init]; emailShareController.mailComposeDelegate = self; [emailShareController setSubject:@"Share Image"]; [emailShareController setMessageBody:message isHTML:NO]; [emailShareController addAttachmentData:UIImageJPEGRepresentation(image,1) mimeType:@"image/jpeg" filename:@"your_image.jpeg"]; if (emailShareController) [self presentVIEwController:emailShareController animated:YES completion:nil];
4)记住将Social.Framework添加到您的项目和以下头文件中
#import <MessageUI/MFMailComposeVIEwController.h>#import <Social/Social.h>#import <MobileCoreServices/MobileCoreServices.h>
5)将视图控制器设置为代理
MFMailComposeVIEwControllerDelegate
邮件发送后立即关闭MailVIEwController –
- (voID)mailComposeController:(MFMailComposeVIEwController *)controller dIDFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{ [self dismissVIEwControllerAnimated:YES completion:nil];}总结
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