UIImage 作为可选

Question

嗨，我希望用户即使不选择个人资料照片也能注册

现在我将此代码用于个人资料图片：

   let profileImageData = UIImageJPEGRepresentation((userImage.image!), 1)

    if (profileImageData != nil) {

        let profileImageFile = PFFile (data: profileImageData!)
        myUser.setObject(profileImageFile!, forKey: "profile_picture")
    }

每次用户在注册时没有选择个人资料图片时，我都会收到此错误

fatal error: unexpectedly found nil while unwrapping an Optional value

我希望用户即使值为 nil 也能注册。

非常感谢

Answer 1

我在这里修改你的代码：

if let profileImageData = UIImageJPEGRepresentation((userImage.image!), 1){

    let profileImageFile = PFFile (data: profileImageData!)
    myUser.setObject(profileImageFile!, forKey: "profile_picture")

}else{
    print("No image selected")
}

希望对您有所帮助！

Answer 2

问题是您试图强制解包 userImage.image 变量，即使它没有设置。仅当您确定变量具有值时才应强制解包。

下面的修改应该有效

if let profileImage = userImage.image{
    let profileImageData = UIImageJPEGRepresentation((profileImage), 1)
    let profileImageFile = PFFile (data: profileImageData!)
    myUser.setObject(profileImageFile!, forKey: "profile_picture")
}else{
    //! Handle part when no image is selected
}

UIImage 作为可选

UIImage as Optional

swift

parse-platform

uiimageview

optional-parameters