我正在尝试使用搜索控制器进行tableview，根据用户在搜索栏tableview中选择的选项，将图像数组从Json文件传递到新的viewcontroller。我为我的应用程序创建了一个搜索栏，该显示栏将显示该应用程序中的所有信息，以便用户可以轻松选择想要查看的图片。通过使用表格视图可以正常工作，当用户选择一行时，它将带有相关图片的变量发送到另一个屏幕上的图片视图。
由于我拥有很多选择，所以我创建了一个Json文件。我对它进行了编码，它将根据用户在搜索栏中键入的内容返回选项。我的问题是我无法将图像数组从.json文件传递到图像视图控制器。它将显示视图控制器，但“数组”图像视图为空白，因为未传递图片数组。下面是我的代码，想知道是否有人有任何想法可以将我指向正确的方向，或者告诉我我做错了什么。
搜索条形码：
import UIKit
class ProtocolCell: UITableViewCell {
@IBOutlet weak var pNameLabel: UILabel!
}
extension String {
func trimmed() -> String {
return self.trimmingCharacters(in: .whitespaces)
}
}
class SearchController: UIViewController, UISearchBarDelegate {
/// Search Bar
@IBOutlet weak var pSearchBar: UISearchBar!
/// Proto Array
fileprivate var myProtocols:[Protocols]?
/// Searhed Array
fileprivate var searchedProtocols:[Protocols]?
/// TableView
@IBOutlet weak var protocolsTV: UITableView!
/// Is Searching
fileprivate var isSearching:Bool=false
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
protocolsTV.tableFooterView=UIView()
pSearchBar.delegate=self
myProtocols=[Protocols]()
searchedProtocols=[Protocols]()
myProtocols?.removeAll()
searchedProtocols?.removeAll()
myProtocols=Functions.getAllProtocolsFromJson()
if protocolsTV.delegate == nil {
protocolsTV.delegate=self
protocolsTV.dataSource=self
}
protocolsTV.reloadData()
}
}
extension SearchController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return isSearching == false ? (myProtocols?.count ?? 0) : (searchedProtocols?.count ?? 0)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ProtocolCell") as! ProtocolCell
cell.pNameLabel.text=isSearching == false ? (myProtocols![indexPath.row].pName ?? "") : (searchedProtocols![indexPath.row].pName ?? "")
return cell
}
//EDIT TABLE FUNCTION HERE!!!!!//
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("Is Searching: \(isSearching) ImagesArray: \(isSearching==true ? (searchedProtocols?[indexPath.row].imagesName ?? []) : (myProtocols?[indexPath.row].imagesName ?? []))")
let Vc = self.storyboard?.instantiateViewController(withIdentifier: "imageViewController") as! imageViewController
let home = self.storyboard?.instantiateViewController(withIdentifier: "FIRST") as! ViewController
//switch indexPath.section
// {
// case 0:
if searchedProtocols?[indexPath.row].pName == "test" {
let arrayStorage = myProtocols?[indexPath.row].imagesName ?? []
Vc.passedArray = arrayStorage
print(arrayStorage)
print(myProtocols?[indexPath.row].imagesName ?? [])
self.navigationController?.pushViewController(Vc, animated: true)
}
else {
self.navigationController?.pushViewController(home, animated: true)
}
// break;
// default:
// self.navigationController?.pushViewController(home, animated: true)
// }
}
func updateSearchData(With searchText: String, In searchBar: UISearchBar) {
if searchText.trimmed().count == 0 {
isSearching=false
searchBar.setShowsCancelButton(false, animated: true)
} else {
isSearching=true
searchBar.setShowsCancelButton(true, animated: true)
}
if isSearching {
/// We Are Searching Sort Array
if searchedProtocols == nil { searchedProtocols=[Protocols]() }
searchedProtocols?.removeAll()
searchedProtocols=myProtocols!.filter({($0.pName ?? "").lowercased().contains(searchText.lowercased())})
/// Make Set So, Data isn't Repeated
searchedProtocols=Array(Set(searchedProtocols ?? []))
} else {
/// Searching is Stopped
searchedProtocols?.removeAll()
}
protocolsTV.reloadData()
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
updateSearchData(With: searchText, In: searchBar)
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
self.view.endEditing(true)
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchBar.setShowsCancelButton(false, animated: true)
searchBar.text=nil
isSearching=false
searchedProtocols?.removeAll()
protocolsTV.reloadData()
self.view.endEditing(true)
}
}
其他使用的代码：
class Protocols: NSObject {
var pName:String?
var imagesName:[UIImage]!
override init() {}
init(With Dict: [String:Any]) {
pName=Dict["name"] as? String ?? ""
imagesName=Dict["imagesArray"] as? [UIImage] ?? []
}
ImageViewController：
class imageViewController: UIViewController,GADBannerViewDelegate, UIGestureRecognizerDelegate, UIScrollViewDelegate {
@IBOutlet weak var pageControl: UIPageControl!
var bannerView: GADBannerView!
var index = 0
var mySelectedProtocol:Protocols?
@IBOutlet weak var scrollView: UIScrollView!
@IBOutlet weak var myImageView: UIImageView!
@IBAction func pictureSwipe(_ sender: Any) {
let pictureString = self.passedArray[index]
self.myImageView.image = pictureString
index = (index < passedArray.count-1) ? index+1 : 0
self.pageControl.numberOfPages = passedArray.count
self.pageControl.currentPage = index
}
@IBAction func pictureswipeback(_ sender: Any) {
let pictureString = self.passedArray[index]
self.myImageView.image = pictureString
index = (passedArray.count-1)
self.pageControl.numberOfPages = passedArray.count
self.pageControl.currentPage = index
}
func configurePageControl() {
self.pageControl.numberOfPages = passedArray.count
self.pageControl.currentPage = 0
self.pageControl.pageIndicatorTintColor = UIColor.white
self.pageControl.currentPageIndicatorTintColor = UIColor.red
self.view.addSubview(pageControl)
if index == 1 {
self.pageControl.currentPage = 1
}
func updateCurrentPageDisplay(){
self.pageControl.numberOfPages = passedArray.count
}
}
var passedImage : UIImage! = nil
var passedArray : [UIImage]!
override func viewDidLoad(){
super.viewDidLoad()
self.myImageView.image = passedArray.first
configurePageControl()
scrollView.delegate = self
self.navigationController?.navigationBar.isHidden = false
scrollView.minimumZoomScale = 1.0
scrollView.maximumZoomScale = 5.0
答案 0 :(得分：0)
在目标控制器中
class DestinationVC: UIViewController {
var mySelectedProtocol:Protocols?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
if mySelectedProtocol == nil { self.navigationController?.popViewController(animated: true) }
/// We have Data
print("Img Array with Name ==> \(mySelectedProtocol?.imagesName ?? [])")
}
}
在源控制器TableView委托中
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("Is Searching: \(isSearching) ImagesArray: \(isSearching==true ? (searchedProtocols?[indexPath.row].imagesName ?? []) : (myProtocols?[indexPath.row].imagesName ?? []))")
let vc:DestinationVC=mainStoryBoard.instantiateViewController(withIdentifier: "DestinationVC") as! DestinationVC
vc.mySelectedProtocol=isSearching==true ? (searchedProtocols?[indexPath.row]) : (myProtocols?[indexPath.row])
self.navigationController?.pushViewController(vc, animated: true)
}
更新2-将图像显示为PageViewController
private func addPageView() {
myScrollView.backgroundColor=UIColor.clear
myScrollView.isUserInteractionEnabled=true
myScrollView.showsHorizontalScrollIndicator=false
myScrollView.isPagingEnabled=true
myScrollView.delegate=self
myScrollView.bounces=false
self.count=mySelectedProtocol!.imagesName!.count
for i in 0..<self.count {
///Get Origin
let xOrigin : CGFloat = CGFloat(i) * myScrollView.frame.size.width
///Create a imageView
let imageView = UIImageView()
imageView.frame = CGRect(x: xOrigin, y: 0, width: myScrollView.frame.size.width, height: myScrollView.frame.size.height)
imageView.contentMode = .scaleAspectFit
imageView.image=UIImage(named: mySelectedProtocol!.imagesName![i])
myScrollView.addSubview(imageView)
}
setUpPageControl()
///Set Content Size to Show
myScrollView.contentSize = CGSize(width: myScrollView.frame.size.width * CGFloat(self.count), height: myScrollView.frame.size.height)
}