Answers:
您可以使用此功能:
UIImageWriteToSavedPhotosAlbum(UIImage *image,
id completionTarget,
SEL completionSelector,
void *contextInfo);
你只需要completionTarget,completionSelector和contextInfo如果你想在什么时候被通知UIImage
做储蓄,否则你可以传递nil
。
在iOS 9.0中已弃用。
有比使用iOS 4.0+ AssetsLibrary框架的UIImageWriteToSavedPhotosAlbum方法快得多的方法
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];
ALAssetsLibrary
保存,保存为的时间相同UIImageWriteToSavedPhotosAlbum
。
像这样将图像从数组传递给它
-(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);
}
}
很抱歉错别字有点飞快,但你明白了
保存照片数组时,请勿使用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.
}
}
以下功能将起作用。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!")
}
}
我最后的答案会做到的。
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];
}
基于上面的一些答案,我为此创建了一个UIImageView类别。
头文件:
@interface UIImageView (SaveImage) <UIActionSheetDelegate>
- (void)addHoldToSave;
@end
实作
@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imageview上调用此函数:
[self.imageView addHoldToSave];
(可选)您可以更改minimumPressDuration参数。
在Swift 2.2中
UIImageWriteToSavedPhotosAlbum(image: UIImage, _ completionTarget: AnyObject?, _ completionSelector: Selector, _ contextInfo: UnsafeMutablePointer<Void>)
如果不想在保存完图像后收到通知,则可以在completionTarget,completionSelector和contextInfo参数中传递nil 。
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具有这3个参数,否则会遇到NSInvocation错误。
希望能帮助到你。