表达式产生错误:执行被中断,原因:跳过.该过程已返回到表达式评估之前的状态

Question

我刚刚开始新的,

点击iPad的前置摄像头,点击用户照片,点击"使用照片",

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])

正在被召唤 imagePickerController

这是代码行..

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])

    {
        picker .dismissViewControllerAnimated(true, completion: nil)
        photoImgView.image=info[UIImagePickerControllerOriginalImage] as? UIImage
        if imageData == nil {
            imageData = UIImageJPEGRepresentation((info[UIImagePickerControllerOriginalImage] as? UIImage)!, 1)
        }
    }

但是当我提交它时显示发现nil value,经过调试得到了这一点,func didFinishPickingMediaWithInfo 其中说,

(lldb) po imageData
expression produced error: Execution was interrupted, reason: step over.
The process has been returned to the state before expression evaluation.

我没有得到我做错的事.因为我不是很好,所以任何人都可以指导我.我被困在这一点上.

提前致谢.

Answer 1

感谢我的同事，我得到了解决方案

我正在从 imagePickerController 捕获图像并保存在NSData. 但捕获的图像大约为 6-7 MB（iPad 相机默认捕获此大小的图像），将其保存NSData然后转换为 Base64 格式时，大小超出了大小，然后编译器抛出了问题。

只需更改行代码即可解决问题UIImageJPEGRepresentation

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
    photoImgView.image=info[UIImagePickerControllerOriginalImage] as? UIImage
    imageData = UIImageJPEGRepresentation((info[UIImagePickerControllerOriginalImage] as? UIImage)!, 0.5)
    print(imageData)
    picker .dismissViewControllerAnimated(true, completion: nil)
}