我從本教程中帶頭：https ://kylebashour.com/posts/context-menu-guide
我以為我擁有一切，但是當我單擊該行時，什么也沒有發生
更新：感謝評論，我了解到長按呼叫 contextMenuConfigurationForRowAt。有沒有辦法通過點擊呼叫它？我想為用戶提供幾種聯系所列人員的選項。但是 UITableViewCell 中的按鈕似乎不起作用，所以背景關系選單是我能想到的最好的，但是長按對于與這個表視圖互動并不明顯。
import UIKit
class PeerSupportVC: UIViewController {
@IBOutlet weak var peerSupportTableView: UITableView!
var supportArray: NSArray = [];
fileprivate var configuration = Configuration.sharedInstance;
override func viewDidLoad() {
super.viewDidLoad()
self.peerSupportTableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
self.peerSupportTableView.delegate = self;
self.peerSupportTableView.dataSource = self;
self.peerSupportTableView.rowHeight = 200.0
getPeerSupport();
}
func getPeerSupport(){
self.supportArray = ["One","Two","Three"]
DispatchQueue.main.async(execute: {
self.peerSupportTableView.reloadData()
});
}
}
extension PeerSupportVC: UITableViewDelegate {
func tableView(_ tableView: UITableView, contextMenuConfigurationForRowAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
let item = self.supportArray[indexPath.row]
return UIContextMenuConfiguration(identifier: nil, previewProvider: nil) { suggestedActions in
let phoneAction = UIAction(title: "Phone Call", image: UIImage(systemName: "person.fill")) { (action) in
DispatchQueue.main.async(execute: {
print("Wants to Phone Call");
});
}
let textAction = UIAction(title: "Text Messsage", image: UIImage(systemName: "person.badge.plus")) { (action) in
DispatchQueue.main.async(execute: {
print("Wants to Text Message");
});
}
return UIMenu(title: "Contact Options", children: [phoneAction, textAction])
}
}
}
extension PeerSupportVC: UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
print("Count of Support Array:",self.supportArray.count);
return self.supportArray.count;
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath);
for viewToRemove in cell.subviews {
viewToRemove.removeFromSuperview();
}
let width = self.peerSupportTableView.frame.width;
if let result = self.supportArray[indexPath.row] as? String{
print(result);
let NameLabel = UILabel(frame: CGRect(x: 180, y: 0, width: width-155, height: 30));
NameLabel.textColor = .black;
NameLabel.text = " " (result);
NameLabel.font = UIFont.systemFont(ofSize: 12, weight: UIFont.Weight(rawValue: 400));
NameLabel.adjustsFontSizeToFitWidth = true;
cell.addSubview(NameLabel);
}
return cell;
}
}
我將代碼簡化為共享，但這個較小的版本仍然不起作用。
我想要發生的是在所選行上彈出一個選單，并為用戶提供有關如何聯系他們選擇的人的選項。任何有關顯示選單的幫助將不勝感激。
uj5u.com熱心網友回復：
作為參考，這是您的代碼，已修改為使用可重復使用的單元格：
// simple cell class, based on your code
class PeerCell: UITableViewCell {
let nameLabel = UILabel()
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
func commonInit() {
nameLabel.translatesAutoresizingMaskIntoConstraints = false
nameLabel.font = .systemFont(ofSize: 12, weight: UIFont.Weight(rawValue: 400))
contentView.addSubview(nameLabel)
let g = contentView.layoutMarginsGuide
NSLayoutConstraint.activate([
nameLabel.topAnchor.constraint(equalTo: g.topAnchor),
nameLabel.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 180.0),
nameLabel.trailingAnchor.constraint(equalTo: g.trailingAnchor),
nameLabel.heightAnchor.constraint(equalToConstant: 30.0),
])
}
}
class PeerSupportVC: UIViewController {
@IBOutlet var peerSupportTableView: UITableView!
var supportArray: [String] = []
override func viewDidLoad() {
super.viewDidLoad()
// register our custom cell
self.peerSupportTableView.register(PeerCell.self, forCellReuseIdentifier: "Cell")
self.peerSupportTableView.delegate = self;
self.peerSupportTableView.dataSource = self;
self.peerSupportTableView.rowHeight = 200.0
getPeerSupport();
}
func getPeerSupport(){
self.supportArray = ["One","Two","Three"]
}
}
extension PeerSupportVC: UITableViewDelegate {
func tableView(_ tableView: UITableView, contextMenuConfigurationForRowAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
let item = self.supportArray[indexPath.row]
return UIContextMenuConfiguration(identifier: nil, previewProvider: nil) { suggestedActions in
let phoneAction = UIAction(title: "Phone Call", image: UIImage(systemName: "person.fill")) { (action) in
print("Wants to Phone Call");
}
let textAction = UIAction(title: "Text Messsage", image: UIImage(systemName: "person.badge.plus")) { (action) in
print("Wants to Text Message");
}
return UIMenu(title: "Contact Options", children: [phoneAction, textAction])
}
}
}
extension PeerSupportVC: UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
print("Count of Support Array:",self.supportArray.count);
return self.supportArray.count;
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! PeerCell
let result = self.supportArray[indexPath.row]
print(result)
cell.nameLabel.text = result
return cell;
}
}
不過，正如我在評論中所說，您contextMenuConfigurationForRowAt的作業是按原樣作業的——只需長按單元格即可觸發呼叫。
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標籤：IOS uitableview
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