问题
when opening working with an UIImagePickerController and setting allowsImageEditing = YES; there is a default cropping frame that is 320x320. In my case, I would like to setup that cropping frame to 320x240 for images that are landscape, and 240x320 for images that are portrait. However, I haven't been able to find a way to change that 320x320 frame that is used when editing /cropping a photo. Has any of you found a way to do it?
Thanks!
回答1:
You have to implement it your self.
The picker only performs 320x320 cropping.
So instead set
allowsImageEditing = NO;
Now you will get the full image back. Then you will have to create a view/view controller that will crop to the proportions you desire.
回答2:
This is the more recent answer with the necessary manual cropping code: Manual Crop
There is still no escaping the hard work.
回答3:
You can try ShittyImageCrop. It's good for cropping to a specific aspect ratio. In your case, present it with aspect ratio 4:3 (or 3:4 in landscape) like this:
let cropVC = ShittyImageCropVC(frame: (self.navigationController?.view.frame)!, image: imageToCrop, aspectWidth: 4, aspectHeight: 3)
self.navigationController?.present(cropVC, animated: true, completion: nil)
After that you can use some other code to just scale it to desired resolution (320x240 or 240x320).
来源：https://stackoverflow.com/questions/998706/how-to-change-the-uiimagepickercontroller-crop-frame