3D Touch快速预览

实现重按一张图片，快速阅览图片。

1、注册View接受3D touch动作。

registerForPreviewing(with:self, sourceView: cell)

2.  写一个ViewController 里面有个 UIImageView 预览图片。

3.  实现  UIViewControllerPreviewingDelegate 协议。

extension ChoosePhotoCC : UIViewControllerPreviewingDelegate {

func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController) {

}

func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {

if let vc = self.storyboard?.instantiateViewController(withIdentifier: "ImagePreviewVC") as? ImagePreviewVC{

vc.loadImage(asset: assets[previewingContext.sourceView.tag])

return vc

}

return nil

}

}

https://github.com/versluis/3D-Touch

https://developer.apple.com/library/content/documentation/UserExperience/Conceptual/Adopting3DTouchOniPhone/3DTouchAPIs.html#//apple_ref/doc/uid/TP40016543-CH4-SW1