问题描述
我正在尝试使用if语句和!= nil运算符检查是否有多个UIImageView &&，但是问题是，当用户选择3张driverPImg.image != nil && passImg.image != nil && carImg.image != nil的任何照片时，下一个代码会被提取并它不会检查其余条件
此图像显示3张图像排列成水平，在Btn将颜色更改为红色之前，所有这些图像均应填充为零或为零，但未发生应该发生的事情
extension VC: UINavigationControllerDelegate,UIImagePickerControllerDelegate {
func imagePickerController(_ picker: UIImagePickerController,didFinishPickingMediawithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let editedImg = info[.editedImage] as? UIImage {
SelectedImg = editedImg.withRenderingMode(.alwaysOriginal)
} else if let originalImg = info[.originalImage] as? UIImage {
SelectedImg = originalImg.withRenderingMode(.alwaysOriginal)
}
if let image = SelectedImg {
if pictureSelectionType == .profilePicture {
driverPImg.image = image
}else if pictureSelectionType == .idPicture{
passImg.image = image
}else if pictureSelectionType == .vhiclePicture{
carImg.image = image
}else {
backCarImg.image = image
}
if driverPImg.image != nil && passImg.image != nil && carImg.image != nil{
sendApplyBtn.backgroundColor = UIColor.delevareColor
}else {
sendApplyBtn.backgroundColor = UIColor.lightGray
}
}
dismiss(animated: true,completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
self.dismiss(animated: true,completion: nil)
}
}
解决方法
您可以使用占位符进行检查，这意味着您的占位符图像是否称为“ placeHolder.png”
if driverPImg.image == UIImage(named: "placeHolder.png") && passImg.image == UIImage(named: "placeHolder.png") && carImg.image == UIImage(named: "placeHolder.png") {
sendApplyBtn.backgroundColor = UIColor.lightGray
}else {
sendApplyBtn.backgroundColor = UIColor.delevareColor
}
我使用了您的代码，并在操场上创建了一个代码段。看来一切正常，我已经初始化了所需的变量才能使代码正常工作。
var btnColor = UIColor.gray
var SelectedImg: UIImage? = UIImage.init(systemName: "house")
enum PictureSelectionType {
case profilePicture
case idPicture
case vhiclePicture
}
var pictureSelectionType: PictureSelectionType? = .idPicture
var driverPImg: UIImageView! = UIImageView()
var passImg: UIImageView! = UIImageView()
var carImg: UIImageView! = UIImageView()
var backCarImg: UIImageView! = UIImageView()
func imagePickerController() {
// if let editedImg = info[.editedImage] as? UIImage {
//
// SelectedImg = editedImg.withRenderingMode(.alwaysOriginal)
//
// } else if let originalImg = info[.originalImage] as? UIImage {
// SelectedImg = originalImg.withRenderingMode(.alwaysOriginal)
//
// }
if let image = SelectedImg {
if pictureSelectionType == .profilePicture {
let image = UIImage()
driverPImg.image = image
}else if pictureSelectionType == .idPicture{
passImg.image = image
}else if pictureSelectionType == .vhiclePicture{
carImg.image = image
}else {
backCarImg.image = image
}
if driverPImg.image != nil && passImg.image != nil && carImg.image != nil{
btnColor = UIColor.red
print("Red color")
}else {
btnColor = UIColor.lightGray
print("Gray color")
}
}
}
imagePickerController()
pictureSelectionType = .profilePicture
imagePickerController()
pictureSelectionType = .vhiclePicture
imagePickerController()
确保先前选择的图像已保存，并且在条件正常的情况下不会无效。