nsdata

iOS 4 Image Oriented Incorrectly When Posted To Server

由 北慕城南 提交于 2019-12-08 09:58:44
问题 I am a relatively new iOS developer. I am attempting to build an app that uploads images to a server. However, when I get the image with metadata, the orientation is always off. Here is the code I am using: - (void)getJPEGFromAssetForURL:(NSURL *)url { ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init]; [assetslibrary assetForURL:url resultBlock: ^(ALAsset *myasset) { self.rep = [myasset defaultRepresentation]; NSLog(@"getJPEGFromAssetForURL: default asset representation for %@:

How to get the size of a UIImage in KB?

由 蓝咒 提交于 2019-12-08 09:35:00
问题 Is there a way to get the filesize in KB from a UIImage, without getting that image from didFinishPickingMediaWithInfo? The images that are presented are coming from the photo album. I tried the following code, but this gives the following result: size of image in KB: 0.000000 - (void)setImage:(UIImage *)image { _image = image; self.imageView.image = image; } - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { [self setupView]; self.backgroundColor = [UIColor

data from camera video returning zero

由 穿精又带淫゛_ 提交于 2019-12-08 08:03:23
问题 this is my code for getting a video from UIImagePickerController : - (IBAction)takeVideo:(UIButton *)sender { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.allowsEditing = YES; picker.sourceType = UIImagePickerControllerSourceTypeCamera; picker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil]; [self presentViewController:picker animated:YES completion:NULL]; } - (void)viewDidAppear:(BOOL)animated { self

Characteristic.value from Bluetooth reading in Swift

由 百般思念 提交于 2019-12-08 06:41:33
I'm trying to read and convert into String a reading from a BT device. <CBCharacteristic: 0x1700a2e80, UUID = 2A9D, properties = 0x20, value = <02ac08e1 07010a14 0029>, notifying = YES> Based on example I found online I did let u16 = (characteristic.value! as NSData).bytes.bindMemory(to: Int.self, capacity: characteristic.value!.count).pointee but my u16 is null, even though characteristic.value contains (lldb) dp characteristic.value! as NSData <02ac08e1 07010a14 0029> Can anyone point me in the right direction? It's not super easy. Weight Measurement You may need to write something like this

Characteristic.value from Bluetooth reading in Swift

由 百般思念 提交于 2019-12-08 06:37:53
问题 I'm trying to read and convert into String a reading from a BT device. <CBCharacteristic: 0x1700a2e80, UUID = 2A9D, properties = 0x20, value = <02ac08e1 07010a14 0029>, notifying = YES> Based on example I found online I did let u16 = (characteristic.value! as NSData).bytes.bindMemory(to: Int.self, capacity: characteristic.value!.count).pointee but my u16 is null, even though characteristic.value contains (lldb) dp characteristic.value! as NSData <02ac08e1 07010a14 0029> Can anyone point me in

Writing photos (and other things) to disk and getting them later in iphone

由 我的梦境 提交于 2019-12-08 06:21:05
问题 I'm trying to write an image to disk: NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsPath = [paths objectAtIndex:0]; NSString* savePath = [documentsPath stringByAppendingPathComponent:@"photo"]; BOOL result = [data writeToFile:savePath atomically:YES]; if(result) NSLog(@"Save of photo success!"); Then, later, I try to retrieve for a table view cell image: NSData* getPhoto = [NSData dataWithContentsOfFile:[leaf content]];

AFNetworking send image as file not as data

由 蓝咒 提交于 2019-12-08 05:25:09
问题 Hi server that I'm sending data is expecting image as file(jpg) not as NSData. This code works, but server can't recognize NSData as image. Any thoughts how to solve this? + (void)signupWithParameters:(NSDictionary *)parameters andUserHaveImage:(BOOL)userHaveImage andImage:(NSData *)image successBlock:(void (^) (NSDictionary *response))successHandler errorBlock:(void (^) (NSDictionary *error))errorHandler { AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; manager

iOS: Why my big files are not converted with NSData(contentsOfFile: options:)? Error Domain=NSCocaErrorDomain Code=256

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-12-08 05:06:37
问题 I try to convert a video with NSData, it works well with little videos or 100mb, but my big files (4.44Gb) are not sent... var video_data: NSData? do { video_data = try NSData(contentsOfFile: (videoPath), options: NSData.ReadingOptions.alwaysMapped) } catch let error as NSError { video_data = nil return } How can I put big files in NSData? Error Domain=NSCocoaErrorDomain Code=256 "Impossible d’ouvrir le fichier « D9C7DABF-4BE3-4105-8D76-AA92B1D1502E_video.notsend »." UserInfo={NSFilePath=/var

New CGIImage or CGImageRef from std::string using using base64

由 巧了我就是萌 提交于 2019-12-08 04:50:20
问题 everyone: I've been working on this for days. Here's a little bit of background. I'm sending an image to a server using protobuf. The image is directly from the camera, so it is not a jpeg nor a png. I found code to get the data from the UIImage using the CGImage to create a CGImageRef. See the following code: - (UIImage *)testProcessedImage:(UIImage *)processedImage { CGImageRef imageRef = processedImage.CGImage; NSData *data1 = (NSData *) CFBridgingRelease(CGDataProviderCopyData

Swift generics and CMutableVoidPointer

由 一曲冷凌霜 提交于 2019-12-07 18:56:39
问题 I have the following function at the moment in my generic class func writeHeader(buffer: CMutableVoidPointer) { var headerData = NSData(bytesNoCopy:buffer, length:sizeof(H)) self.fileHandle.writeData(headerData) } But as you see this is not very type safe. I tried this but it does not compile func writeHeader(buffer: CMutablePointer<H>) { var headerData = NSData(bytesNoCopy:buffer, length:sizeof(H)) self.fileHandle.writeData(headerData) } Any idea? UPDATE This is part of a generic class as
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