如何保存拍摄的照片
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【中文标题】如何保存拍摄的照片【英文标题】:How to save taken photo 【发布时间】:2013-07-16 03:25:17 【问题描述】:我想保存我在应用中拍摄的照片。我想保存图片,这样即使我关闭应用程序,图片仍会保存。这是我写到现在的代码
-(IBAction)TakePhoto
picker = [[UIImagePickerController alloc]init];
picker.delegate = self;
[picker setSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:picker animated:YES completion:nil];
- (IBAction)ChooseExisting
picker2 = [[UIImagePickerController alloc]init];
picker2.delegate = self;
[picker2 setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[self presentViewController:picker2 animated:YES completion:nil];
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
image = [info objectForKey:UIImagePickerControllerOriginalImage];
[imageview setImage:image];
[self dismissViewControllerAnimated:YES completion:nil];
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
[self dismissViewControllerAnimated:YES completion:NULL];
我应该如何让应用程序保存我拍摄的照片并显示它。
【问题讨论】:
您想将它保存在用户的相机胶卷中吗?还是在您自己的应用程序中?前者只是UIImageWriteToSavedPhotosAlbum
C函数。
【参考方案1】:
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString * basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
UIImage * imageToSave = [UIImage imageNamed:@"Icon.png"];
NSData * binaryImageData = UIImagePNGRepresentation(imageToSave);
[binaryImageData writeToFile:[basePath stringByAppendingPathComponent:@"myfile.png"] atomically:YES];
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您可能需要使用 imageToSave 变量编辑该行并将其更改为 UIImage 变量,这是您从相机获得的。
【讨论】:
【参考方案2】:用你的方法试试这个:
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
image = [info objectForKey:UIImagePickerControllerOriginalImage];
[imageview setImage:image];
//Save Your Image ======
UIImage *yourImage = imageView.image;//imageView.image;
NSString *docDirPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *filePath = [docDirPath stringByAppendingPathComponent:@"myImageFile.png"];
[UIImagePNGRepresentation(yourImage) writeToFile:filePath atomically:YES];
[self dismissViewControllerAnimated:YES completion:nil];
在你 viewDidLoad 的同一个类中这样写:
//For Get your Image from Documents Dir
NSString *docDirPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *filePath = [docDirPath stringByAppendingPathComponent:@"myImageFile.png"];
if([[NSFileManager defaultManager] fileExistsAtPath:filePath])
//if file already saved then set it on your imageView
UIImage *getYourImage = [UIImage imageWithContentsOfFile:filePath];
imageView.image = getYourImage;
else
//otherwise set a Dummy Image on your ImageView or nil
imageView.image = nil; //[UIImage imageNamed:@"dummyImage.png"];
【讨论】:
【参考方案3】:// 调用该方法从摄像头抓图
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
//Get image
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
//Display in ImageView object (if you want to display it
[imageView setImage:image];
[ButtonName setImage:image forState:UIControlStateNormal];
//Take image picker off the screen (required)
[self dismissModalViewControllerAnimated:YES];
// 保存图像:
- (NSString *)saveImage:(UIImage*)image:(NSString*)imageName
NSData *imageData = UIImagePNGRepresentation(image); //convert image into .png format.
NSFileManager *fileManager = [NSFileManager defaultManager];//create instance of NSFileManager
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); //create an array and store result of our search for the documents directory in it
NSString *documentsDirectory = [paths objectAtIndex:0]; //create NSString object, that holds our exact path to the documents directory
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", imageName]]; //add our image to the path
[fileManager createFileAtPath:fullPath contents:imageData attributes:nil]; //finally save the path (image)
NSLog(@"FULL PATH %@",fullPath);
NSLog(@"image saved");
return fullPath;
// 删除图像
- (void)removeImage:(NSString*)fileName
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", fileName]];
[fileManager removeItemAtPath: fullPath error:NULL];
NSLog(@"image removed");
// 从图库中加载图片
- (UIImage*)loadImage:(NSString*)imageName
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", imageName]];
NSLog(@"Loading Image Path : %@",fullPath);
return [UIImage imageWithContentsOfFile:fullPath];
【讨论】:
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