简单解决方案(Swift 4.2)
方法1:
extension PHAsset {
var image : UIImage {
var thumbnail = UIImage()
let imageManager = PHCachingImageManager()
imageManager.requestImage(for: self, targetSize: CGSize(width: 100, height: 100), contentMode: .aspectFit, options: nil, resultHandler: { image, _ in
thumbnail = image!
})
return thumbnail
}
}
let image = asset.image
如果您只需要从PHAsset
获取UIImage
,请使用此方法。
或者
extension PHAsset {
func image(targetSize: CGSize, contentMode: PHImageContentMode, options: PHImageRequestOptions?) -> UIImage {
var thumbnail = UIImage()
let imageManager = PHCachingImageManager()
imageManager.requestImage(for: self, targetSize: targetSize, contentMode: contentMode, options: options, resultHandler: { image, _ in
thumbnail = image!
})
return thumbnail
}
}
let image = asset.image(targetSize: CGSize, contentMode: PHImageContentMode, options: PHImageRequestOptions?)
使用此方法获取您所需的 UIImage
。
或者
extension PHAsset {
func image(completionHandler: @escaping (UIImage) -> ()){
var thumbnail = UIImage()
let imageManager = PHCachingImageManager()
imageManager.requestImage(for: self, targetSize: CGSize(width: 100, height: 100), contentMode: .aspectFit, options: nil, resultHandler: { img, _ in
thumbnail = img!
})
completionHandler(thumbnail)
}
}
let image = asset.image(completionHandler: {(img) in
print("Finished")
})
使用此方法在完成后进行通知。
方法二:
extension PHAsset {
var data : (UIImage, [AnyHashable : Any]) {
var img = UIImage(); var information = [AnyHashable : Any](); let imageManager = PHCachingImageManager()
imageManager.requestImage(for: self, targetSize: CGSize(width: 100, height: 100), contentMode: .aspectFit, options: nil, resultHandler: { image,info in
img = image!
information = info!
})
return (img,information)
}
}
let image_withData : (UIImage, [AnyHashable : Any]) = asset.data
如果您想要PHAsset
的UIImage
和结果信息,请使用此方法。
或者
extension PHAsset {
func data(targetSize: CGSize, contentMode: PHImageContentMode, options: PHImageRequestOptions?) -> (UIImage, [AnyHashable : Any]) {
var img = UIImage(); var information = [AnyHashable : Any](); let imageManager = PHCachingImageManager()
imageManager.requestImage(for: self, targetSize: targetSize, contentMode: contentMode, options: options, resultHandler: { image,info in
img = image!
information = info!
})
return (img,information)
}
}
let data = asset?.data(targetSize: CGSize, contentMode: PHImageContentMode, options: PHImageRequestOptions?)
使用此方法来获取所需数据。