如何在 uiimagepickercontroller 中创建可裁剪的横幅图像？

Posted 2023-02-25

【中文标题】如何在 uiimagepickercontroller 中创建可裁剪的横幅图像？

【英文标题】：How do I create a croppable banner image in uiimagepickercontroller?

【发布时间】：2018-10-22 01:57:56

【问题描述】：

当我展示 UIImagePickerController 时，我希望用户能够为用户想要从他们的照片库中导入的横幅裁剪 7.8 的比例。

这个问题类似于许多与创建自定义裁剪矩形相关的问题，这些问题构建为与 UIImagePickerController 一起使用，但所有答案都指向过时的库或过于复杂的库。我想要一些简单的东西。

【参考方案1】：

试试这个：

open func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) 
    var newImage: UIImage

    if picker.sourceType == .camera 
        if let possibleImage = info["UIImagePickerControllerOriginalImage"] as? UIImage 
            // save photo
        
    

    if UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiom.pad && picker.sourceType == .photoLibrary 
        if let possibleImage = info["UIImagePickerControllerOriginalImage"] as? UIImage 
            newImage = possibleImage
        
     else 
        if let possibleImage = info["UIImagePickerControllerEditedImage"] as? UIImage 
            newImage = possibleImage
         else if let possibleImage = info["UIImagePickerControllerOriginalImage"] as? UIImage 
            newImage = possibleImage
        
    

    // logic to manipulate image
    print("image size: \(newImage.size)")

    let newHeight = 100 // change to preferred height
    let scale = 7.8
    let newWidth = newImage.size.width

    UIGraphicsBeginImageContext(CGSize(width: newWidth, height: newHeight))

    newImage.draw(in: CGRect(x: 0, y: 0,width: newWidth, height: newHeight))
    newImage = UIGraphicsGetImageFromCurrentImageContext()!
    UIGraphicsEndImageContext()
    print("image size: \(newImage.size)")

    // add logic here