如何从PHAsset获取图像URL?是否可以使用PHAsset URL将图像保存到文档目录? [英] How To get Image URL From PHAsset? Is it possible To save Image using PHAsset URL to document Directory?
本文介绍了如何从PHAsset获取图像URL?是否可以使用PHAsset URL将图像保存到文档目录?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我用过
`NSURL *urlA = [info valueForKey:@"PHImageFileURLKey"];`
但是当我尝试使用URL保存图像时,则URL为零。
but when i try to save image using URL then URL is nil.
`NSData *pngData =[NSData dataWithContentsOfURL:urlA options:NSDataReadingMapped error:nil];`
推荐答案
asset =在这里你必须通过你的PHAsset。
asset = Here you have to pass your PHAsset .
PHImageRequestOptions * imageRequestOptions = [[PHImageRequestOptions alloc] init];
[[PHImageManager defaultManager]
requestImageDataForAsset:asset
options:imageRequestOptions
resultHandler:^(NSData *imageData, NSString *dataUTI,
UIImageOrientation orientation,
NSDictionary *info)
{
NSLog(@"info = %@", info);
if ([info objectForKey:@"PHImageFileURLKey"]) {
NSURL *path = [info objectForKey:@"PHImageFileURLKey"];
// if you want to save image in document see this.
[self saveimageindocument:imageData withimagename:[NSString stringWithFormat:@"DEMO"]];
}
}];
-(void) saveimageindocument:(NSData*) imageData withimagename:(NSString*)imagename{
NSString *writePath = [NSString stringWithFormat:@"%@/%@.png",[Utility getDocumentDirectory],imagename];
if (![imageData writeToFile:writePath atomically:YES]) {
// failure
NSLog(@"image save failed to path %@", writePath);
} else {
// success.
NSLog(@"image save Successfully to path %@", writePath);
}
}
+ (NSString*)getDocumentDirectory {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
return [paths objectAtIndex:0];
}
检查横向模式或纵向模式的图像
Check image that landscape mode or portrait mode
if (chooseimage.size.height >= chooseimage.size.width)
{
Islandscape = NO;
}else{
UIImage* landscapeImage = [UIImage imageWithCGImage:chooseimage.CGImage
scale:chooseimage.scale
orientation:UIImageOrientationLeft];
self.imgPreviewView.image = landscapeImage;
self.imgPreviewView.contentMode = UIViewContentModeScaleAspectFill;
Islandscape = YES;
}
将此权限添加到info.plist文件中
Add this permission into info.plist file
<key>NSPhotoLibraryUsageDescription</key>
<string>$(PRODUCT_NAME) would like to access your photo library to let you select a picture.</string>
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