这个问题在这里已经有了答案:CropUIImagetocentersquare(1个回答)关闭5年前。我想通过获取x1、x2、y1、y2的值​​将肖像/风景图像裁剪为中心完美正方形图像。怎么做？letx=pickedImage.size.widthlety=pickedImage.size.height//Portraitimageif(pickedImage.size.widthpickedImage.size.height){//cropimageandgetvalueofx1,x2,y1,y2}

如何防止用户在UIImagePickerContoroller中两次选择相同的图像以避免重复？我试着用URLReference来做，但它不起作用，所以我猜这不是办法。funcimagePickerController(_picker:UIImagePickerController,didFinishPickingMediaWithInfoinfo:[String:Any]){ifleturl=info[UIImagePickerControllerReferenceURL]as?NSURL{ifphotosURL.contains(url){Utilities.showMessage(