我正在实现一个共享扩展，该扩展在图像处理完成之前就消失了。
2018-02-22 15:11:20.327673-0500 ContentShare[9491:649748] [core] SheetViewController didReceiveMemoryWarning
2018-02-22 15:11:20.367087-0500 ContentShare[9491:649748] [core] SheetViewController didReceiveMemoryWarning
Program ended with exit code: 0
我还没有创建任何名为
SheetViewControllerShareViewController.m 已选择邮政编码：
- (void)didSelectPost {
// This is called after the user selects Post. Do the upload of contentText and/or NSExtensionContext attachments.
NSExtensionItem *inputItem = self.extensionContext.inputItems.firstObject;
NSExtensionItem *outputItem = [inputItem copy];
outputItem.attributedContentText = [[NSAttributedString alloc] initWithString:self.contentText attributes:nil];
// Complete this implementation by setting the appropriate value on the output item.
[self.extensionContext.inputItems enumerateObjectsUsingBlock:^(NSExtensionItem * _Nonnull item, NSUInteger idx, BOOL * _Nonnull stop) {
[item.attachments enumerateObjectsUsingBlock:^(NSItemProvider * _Nonnull itemProvider, NSUInteger idx, BOOL * _Nonnull stop) {
NSString *extension = nil;
NSString *identifier = nil;
MESSAGE_TYPE type = TEXT;
if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeImage]) {
extension = @".jpg";
identifier = (NSString *)kUTTypeImage;
type = PHOTO;
} else if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeAudio]) {
extension = @".mp3";
identifier = (NSString *)kUTTypeAudio;
type = AUDIO;
} else if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeVideo]) {
extension = @".mp4";
identifier = (NSString *)kUTTypeVideo;
type = VID;
} else if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeData]) {
extension = @".data";
identifier = (NSString *)kUTTypeData;
type = DOWNLOAD;
}
if (identifier != nil) {
[itemProvider loadItemForTypeIdentifier:identifier
options:nil
completionHandler:^(id<NSSecureCoding> _Nullable item, NSError * _Null_unspecified error) {
if ([(NSObject *)item isKindOfClass:[NSURL class]])
{
if ([(NSURL *)item isFileURL] == YES) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSLog(@"PROCESS ON BACKGROUND THREAD");
MyWebServices *services = [[MyWebServices alloc] init];
[services processSharedItemWithReceiver:self.receiver
message:self.contentText
andContent:item
withCompletionBlock:^(NSMutableArray *resultsArray) {
NSLog(@"RESULTS ARRAY: %@", resultsArray);
NSLog(@"IN COMPLETION BLOCK TO CLOSE SHARE UI");
}];
});
[self.extensionContext completeRequestReturningItems:@[] completionHandler:nil];
}
}
}];
}
}];
}];
}
MyWebServices.m 代码
- (void)processSharedItemWithReceiver:(NSString*)receiver
message:(NSString*)contentMessage
andContent:(id<NSSecureCoding>)item
withCompletionBlock:(void (^)(NSMutableArray *resultsArray))completion{
NSData *data = [NSData dataWithContentsOfURL:(NSURL *)item];
NSString *fname = [(NSURL *)item lastPathComponent];
NSString *mimeType = [self mimeTypeForData:[NSData dataWithContentsOfURL:(NSURL *)item]];
NSLog(@"SENDING FILE: %@ WITH FILETYPE: %@", fname, mimeType);
//Compress and rotate image so that it is in correct pixel orientation because not all EXIF is respected
NSData *compressedImg = [self compressJPEGImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:(NSURL *)item]]];
//Convert compressed image into base64 data to POST to server
//NSString *base64String = [compressedImg base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
if(data){
/* [self setUserShareMessageToUser:receiver withMessage:contentMessage postFileContent:base64String fileType:mimeType fileName:fname CompletionBlock:^(NSMutableArray *resultsArray) {
NSLog(@"IN COMPLETION BLOCK: %@", resultsArray);
if(completion) {
//[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
completion([resultsArray[0] valueForKey:@"CONTENT"]);
}
}]; */
NSMutableArray *arr = [NSMutableArray arrayWithObjects:fname, mimeType, nil];
completion(arr);
}
}
-(NSString *)mimeTypeForData:(NSData *)data {
uint8_t c;
[data getBytes:&c length:1];
switch (c) {
case 0xFF:
return @"image/jpeg";
break;
case 0x89:
return @"image/png";
break;
case 0x47:
return @"image/gif";
break;
case 0x49:
case 0x4D:
return @"image/tiff";
break;
case 0x25:
return @"application/pdf";
break;
case 0xD0:
return @"application/vnd";
break;
case 0x46:
return @"text/plain";
break;
default:
return @"application/octet-stream";
}
return nil;
}
-(NSData *)compressJPEGImage:(UIImage*)image{
UIImageOrientation o = image.imageOrientation;
float degreesOfRotation = 0.0;
NSLog(@"IMAGE ORIENTATION: %li", o);
//UIImageOrientationUp, // default orientation
//UIImageOrientationDown, // 180 deg rotation
//UIImageOrientationLeft, // 90 deg CCW
//UIImageOrientationRight, // 90 deg CW
switch (o) {
case UIImageOrientationDown:
degreesOfRotation = 180.0;
break;
case UIImageOrientationLeft:
degreesOfRotation = 270.0;
break;
case UIImageOrientationRight:
degreesOfRotation = 90.0;
break;
default:
//UIImageOrientationUp -- Default
break;
}
CGRect rect = CGRectMake(0.0, 0.0, image.size.width, image.size.height);
UIGraphicsBeginImageContext(rect.size);
[image drawInRect:rect];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
//Compress Image
NSData *imageData = UIImageJPEGRepresentation(img, .8);
UIGraphicsEndImageContext();
//Rotate Image
UIImage *rotatedImg = [[UIImage imageWithData:imageData] imageRotatedByDegrees:degreesOfRotation];
NSData *rotatedImageData = UIImageJPEGRepresentation(rotatedImg, 1.0);
return rotatedImageData;
}
请遵循我下面关于内存处理以及在 ios 共享扩展中管理内存的最佳方法的答案。