如何在將圖像加載到視圖控制器之前裁剪圖像

-1

在我的視圖控制器中，我的UIImageView被設置爲370x370，當我加載圖像時它目前拉伸以適合ImageView。如何在將圖像加載到視圖控制器之前裁剪圖像

這是我目前有選擇的圖像：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
    // Runs when user is picking image from library 
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage { 
     self.previewImageView.image = pickedImage 
     self.selectImageButton.isEnabled = false 
     self.selectImageButton.isHidden = true 
     uploadImage(image: pickedImage) 
     picker.dismiss(animated: true, completion: nil) 
    } 
}

我是相當新的雨燕，這將是最好的是實現圖像裁剪成我的代碼？

來源

2017-02-15 gabe

你確定你想裁剪？這聽起來像是你真的想將imageView內容模式設置爲Aspect Fit。（UIImageView，屬性是contentMode，值是aspectFit。） – dfd

這不是邏輯。 –

當你調用ImagePicker功能，設置allowsEditing爲真：

self.imagePicker.allowsEditing = true 
self.imagePicker.sourceType = .camera 
self.present(self.imagePicker, animated: true, completion: nil)

另一種選擇，如果你想多一點的定製，你可以使用這個庫：https://github.com/TimOliver/TOCropViewController

而且在didFinishPickingMediaWithInfo，你做這樣的事情：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage{ 
     dismiss(animated: true, completion: nil) 
     let cropVC = TOCropViewController(image: pickedImage) 
     cropVC.delegate = self 
     cropVC.aspectRatioPickerButtonHidden = true 
     cropVC.aspectRatioPreset = .presetSquare 
     cropVC.aspectRatioLockEnabled = true 
     cropVC.resetAspectRatioEnabled = false 
     self.present(cropVC, animated: true, completion: nil) 
    } 
}

來源

2017-02-15 03:26:14

如何在將圖像加載到視圖控制器之前裁剪圖像

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