swift - 如何使用按钮单击功能将 PHAsset 转换为 UIImage

Question

好吧，我已经研究这个问题有一段时间了，但我似乎无法解决它。

我有一个 ImagePicker，它将图像捆绑到 PHAssest 中。来自https://github.com/hyperoslo/ImagePicker

选择图像后，完成按钮将被激活。我有一个 UIImageView，当我按下 func didButtonDidPress(images: [UIImage]) 时，会将 PHAsset 转换为 UIImage 并将其加载到 ImageView 中。目前，这是我的代码不起作用:

// CONVERT PHASSET TO UIIMAGE
func getAsset(asset: PHAsset) -> UIImage {
let manager = PHImageManager.defaultManager()
let option = PHImageRequestOptions()
var image = UIImage()
option.synchronous = true
manager.requestImageForAsset(asset, targetSize: CGSize(width: 100.0, height: 100.0), contentMode: .AspectFit, options: option, resultHandler: {(result, info)->Void in
    image = result!
})
return image
}




func doneButtonDidPress(images: [UIImage]) {



self.imagePickerController.dismissViewControllerAnimated(true, completion: nil)
var selectedImg = imagePickerController.stack.assets

getAsset(selectedImg)
self.SelectedImageView.image = UIImage(named: selectedImg)



}

其中标记有错误。有人能帮我一下吗？!谢谢

Answer 1

我从 PHAsset 获取 UIImage，如下所示:

func getAsset(asset: PHAsset) -> UIImage {
var image = UIImage()
let imgManager = PHImageManager.defaultManager()
            let requestOptions = PHImageRequestOptions()
            requestOptions.synchronous = true
            imgManager.requestImageForAsset(asset, targetSize: CGSizeMake(300.0, 300.0), contentMode: PHImageContentMode.AspectFit, options: requestOptions, resultHandler: { (img, _) in
                image = img
            })
return image
}

此代码已经过测试并且当前在我的应用程序中运行。

完成按钮方法应该像:

func doneButtonDidPress(image: [UIImage]) {
self.imagePickerController.dismissViewControllerAnimated(true, completion: nil)
var selectedImg = imagePickerController.stack.assets.first
self.selectedImageView.image = getAsset(selectedImg)
}