我需要做什么才能将程序生成的图像（可能来自相机，可能不是）保存到 iPhone 上的系统照片库？
您可以使用此功能：
UIImageWriteToSavedPhotosAlbum(UIImage *image,
id completionTarget,
SEL completionSelector,
void *contextInfo);
如果您想在 UIImage 保存完成时收到通知，则只需要 completionTarget、completionSelector 和
contextInfo，否则可以传入
nil请参阅官方文档了解
UIImageWriteToSavedPhotosAlbum()在 iOS 9.0 中已弃用。
使用 iOS 4.0+ AssetsLibrary 框架有比 UIImageWriteToSavedPhotosAlbum 更快的方法
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation)[image imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
if (error) {
// TODO: error handling
} else {
// TODO: success handling
}
}];
[library release];
要记住的一件事：如果您使用回调，请确保您的选择器符合以下形式：
- (void) image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo;
否则，您将崩溃并出现如下错误：
[NSInvocation setArgument:atIndex:]: index (2) out of bounds [-1, 1]只需将图像从数组传递给它就可以了
-(void) saveMePlease {
//Loop through the array here
for (int i=0:i<[arrayOfPhotos count]:i++){
NSString *file = [arrayOfPhotos objectAtIndex:i];
NSString *path = [get the path of the image like you would in DOCS FOLDER or whatever];
NSString *imagePath = [path stringByAppendingString:file];
UIImage *image = [[[UIImage alloc] initWithContentsOfFile:imagePath]autorelease];
//Now it will do this for each photo in the array
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
}
}
抱歉，打字错误，只是临时做的，但你明白了
保存照片数组时，不要使用 for 循环，请执行以下操作
-(void)saveToAlbum{
[self performSelectorInBackground:@selector(startSavingToAlbum) withObject:nil];
}
-(void)startSavingToAlbum{
currentSavingIndex = 0;
UIImage* img = arrayOfPhoto[currentSavingIndex];//get your image
UIImageWriteToSavedPhotosAlbum(img, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
- (void)image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo{ //can also handle error message as well
currentSavingIndex ++;
if (currentSavingIndex >= arrayOfPhoto.count) {
return; //notify the user it's done.
}
else
{
UIImage* img = arrayOfPhoto[currentSavingIndex];
UIImageWriteToSavedPhotosAlbum(img, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
}
在Swift中：
// Save it to the camera roll / saved photo album
// UIImageWriteToSavedPhotosAlbum(self.myUIImageView.image, nil, nil, nil) or
UIImageWriteToSavedPhotosAlbum(self.myUIImageView.image, self, "image:didFinishSavingWithError:contextInfo:", nil)
func image(image: UIImage!, didFinishSavingWithError error: NSError!, contextInfo: AnyObject!) {
if (error != nil) {
// Something wrong happened.
} else {
// Everything is alright.
}
}
以下功能可以使用。您可以从这里复制并粘贴到那里...
-(void)savePhotoToAlbum:(UIImage*)imageToSave {
CGImageRef imageRef = imageToSave.CGImage;
NSDictionary *metadata = [NSDictionary new]; // you can add
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:imageRef metadata:metadata completionBlock:^(NSURL *assetURL,NSError *error){
if(error) {
NSLog(@"Image save eror");
}
}];
}
斯威夫特4
func writeImage(image: UIImage) {
UIImageWriteToSavedPhotosAlbum(image, self, #selector(self.finishWriteImage), nil)
}
@objc private func finishWriteImage(_ image: UIImage, didFinishSavingWithError error: NSError?, contextInfo: UnsafeRawPointer) {
if (error != nil) {
// Something wrong happened.
print("error occurred: \(String(describing: error))")
} else {
// Everything is alright.
print("saved success!")
}
}
我的最后一个答案就可以了..
对于要保存的每个图像，将其添加到 NSMutableArray
//in the .h file put:
NSMutableArray *myPhotoArray;
///then in the .m
- (void) viewDidLoad {
myPhotoArray = [[NSMutableArray alloc]init];
}
//However Your getting images
- (void) someOtherMethod {
UIImage *someImage = [your prefered method of using this];
[myPhotoArray addObject:someImage];
}
-(void) saveMePlease {
//Loop through the array here
for (int i=0:i<[myPhotoArray count]:i++){
NSString *file = [myPhotoArray objectAtIndex:i];
NSString *path = [get the path of the image like you would in DOCS FOLDER or whatever];
NSString *imagePath = [path stringByAppendingString:file];
UIImage *image = [[[UIImage alloc] initWithContentsOfFile:imagePath]autorelease];
//Now it will do this for each photo in the array
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
}
}
homeDirectoryPath = NSHomeDirectory();
unexpandedPath = [homeDirectoryPath stringByAppendingString:@"/Pictures/"];
folderPath = [NSString pathWithComponents:[NSArray arrayWithObjects:[NSString stringWithString:[unexpandedPath stringByExpandingTildeInPath]], nil]];
unexpandedImagePath = [folderPath stringByAppendingString:@"/image.png"];
imagePath = [NSString pathWithComponents:[NSArray arrayWithObjects:[NSString stringWithString:[unexpandedImagePath stringByExpandingTildeInPath]], nil]];
if (![[NSFileManager defaultManager] fileExistsAtPath:folderPath isDirectory:NULL]) {
[[NSFileManager defaultManager] createDirectoryAtPath:folderPath attributes:nil];
}
我根据上面的一些答案为此创建了一个 UIImageView 类别。
头文件：
@interface UIImageView (SaveImage) <UIActionSheetDelegate>
- (void)addHoldToSave;
@end
实施
@implementation UIImageView (SaveImage)
- (void)addHoldToSave{
UILongPressGestureRecognizer* longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
longPress.minimumPressDuration = 1.0f;
[self addGestureRecognizer:longPress];
}
- (void)handleLongPress:(UILongPressGestureRecognizer*)sender {
if (sender.state == UIGestureRecognizerStateEnded) {
UIActionSheet* _attachmentMenuSheet = [[UIActionSheet alloc] initWithTitle:nil
delegate:self
cancelButtonTitle:@"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:@"Save Image", nil];
[_attachmentMenuSheet showInView:[[UIView alloc] initWithFrame:self.frame]];
}
else if (sender.state == UIGestureRecognizerStateBegan){
//Do nothing
}
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 0) {
UIImageWriteToSavedPhotosAlbum(self.image, nil,nil, nil);
}
}
@end
现在只需在您的图像视图上调用此函数即可：
[self.imageView addHoldToSave];
您可以选择更改minimumPressDuration 参数。
在 Swift 2.2 中
UIImageWriteToSavedPhotosAlbum(image: UIImage, _ completionTarget: AnyObject?, _ completionSelector: Selector, _ contextInfo: UnsafeMutablePointer<Void>)
如果您不想在图像保存完成时收到通知，则可以在 completionTarget、completionSelector 和 contextInfo 参数中传递 nil。
示例：
UIImageWriteToSavedPhotosAlbum(image, self, #selector(self.imageSaved(_:didFinishSavingWithError:contextInfo:)), nil)
func imageSaved(image: UIImage!, didFinishSavingWithError error: NSError?, contextInfo: AnyObject?) {
if (error != nil) {
// Something wrong happened.
} else {
// Everything is alright.
}
}
这里要注意的重要一点是，观察图像保存的方法应该具有这 3 个参数，否则您将遇到 NSInitation 错误。
希望有帮助。
你可以用这个
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
UIImageWriteToSavedPhotosAlbum(img.image, nil, nil, nil);
});
对于斯威夫特 5.0
我使用此代码将图像复制到我的应用程序创建的相册中； 当我想复制图像文件时，我调用“startSavingPhotoAlbume()”函数。 首先，我从 App 文件夹中获取 UIImage，然后将其保存到相册中。 因为它不相关，所以我不展示如何从应用程序文件夹中读取图像。
var saveToPhotoAlbumCounter = 0
func startSavingPhotoAlbume(){
saveToPhotoAlbumCounter = 0
saveToPhotoAlbume()
}
func saveToPhotoAlbume(){
let image = loadImageFile(fileName: imagefileList[saveToPhotoAlbumCounter], folderName: folderName)
UIImageWriteToSavedPhotosAlbum(image!, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)
}
@objc func image(_ image: UIImage, didFinishSavingWithError error: NSError?, contextInfo: UnsafeRawPointer) {
if (error != nil) {
print("ptoto albume savin error for \(imageFileList[saveToPhotoAlbumCounter])")
} else {
if saveToPhotoAlbumCounter < imageFileList.count - 1 {
saveToPhotoAlbumCounter += 1
saveToPhotoAlbume()
} else {
print("saveToPhotoAlbume is finished with \(saveToPhotoAlbumCounter) files")
}
}
}
要使用 Swift 将图像保存到 iPhone 照片库，您可以使用 UIImageWriteToSavedPhotosAlbum 函数。这是一个基本示例：
// Assuming you have a UIImage object
let image = UIImage（命名为：“https://reminiapkmod.in/”）
//保存图片到照片库的函数 UIImageWriteToSavedPhotosAlbum（图像！，nil，nil，nil）