swift3

问题 I read quite a few questions and answers no this problem. Some are for Ojective C. Some are for iOS. The ones that were close to what I need didn't work. I've set up a protocol for delegation. It doesn't work. The problem is that delegate variable isn't set. I need the reference to an active controller. Delegator protocol SwitchTabDelegate: class { func selectTab(tab: Int) } class ViewController: NSViewController { weak var delegate: SwitchTabDelegate? override func viewDidLoad() { super

问题 i have date string 2017-01-03T10:45:00.000+02:00 and I need to transfer it to something like this 2017-01-03 10:45:00 +0200 let formatter = DateFormatter() formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ" // this formatter returning 2017-01-03 08:45:00 +0000 but I need // 2017-01-03 10:45:00 +0200 Thank you for your help! 回答1: Try this, Swift 3.0 let dateStr = "2017-01-03T10:45:00.000+02:00" let dateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyy-MM-dd\'T\'HH:mm:ss\'.000\'z"

问题 Currently in my code, I'm programmatically adding a UITextView within a UITableViewCell and added the ability to auto-resize the cell based on how much content is typed by the user. It currently looks like so: override func viewDidLoad() { tableView.estimatedRowHeight = 30.0 tableView.rowHeight = UITableViewAutomaticDimension } override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { // Dequeue the cell to load data let cell: UITableViewCell =

问题 In my project CollectionView in TableViewCell isn't display and I added cell.collectionView.reloadData() in my code. After I added, CollectionView displayed in TableViewCell , but ScrollView isn't smooth. How to solve this problem. If someone have any experience or ideas help me. Thanks. func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCell(withIdentifier: "homecell") as! HomeCategoryRowCell let mainThemeList

问题 I've been trying to set a tuple to the sender object when doing a perform segue like: performSegue(withIdentifier: "", sender: ("hello", "hello2")) But inside override func prepare(for segue: UIStoryboardSegue, sender: Any?) I'm getting cast exception when trying to cast sender as (String, String) It seems that only the first element of the tuple is in sender . I'd expect since sender is of type Any? I could use a tuple as variable? Has anyone else experienced this? 回答1: Per the documentation

问题 I'm trying to create login/protected page session page using Swift 3.0 Therefore, I created didFinishLaunchingWithOptions launchOptions function in AppDelegate.swift as below AppDelegate.swift import UIKit @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate { var window: UIWindow? func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { // Override point for customization after application

问题 I searched the whole internet but only found solutions for Swift 2 or outdated Xcode versions which doesnt help me :/ Also Im very new to Xcode and Swift, so please excuse that. I want the user to input some numbers in several UITextFields and then press a "calculate" button which shows the result in a UILabel. What I tested so far: Convert input data to Integer in Swift Swift calculate value of UITextFields and return value So my code looks really poor so far. Nothing worked so thats all I

问题 So I've my app crashing everytime I try to delete the last cell of the section. Ex., if my section has 10 rows, I can delete them without any problem but the last one throws the following error: Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of sections. The number of sections contained in the table view after the update (1) must be equal to the number of sections contained in the table view before the update (3), plus or

问题 I have a TableView that has data inside of it via Labels. When you click the label the Tap registers but now I would like to get the Data of the clicked label and I am having a difficult time getting that done. I have the same functionality working for Buttons for instance this is how I do it for my buttons inside a TableView . Button Click Event var locations = [String]() @IBOutlet weak var Location: UIButton! override func viewDidLoad() { super.viewDidLoad() TableSource.dataSource = self }

问题 I have the following JSON { "results" : [ { "address_components" : [ { "long_name" : "OL12 7LD", "short_name" : "OL12 7LD", "types" : [ "postal_code" ] }, { "long_name" : "Ings Lane", "short_name" : "Ings Ln", "types" : [ "route" ] }, { "long_name" : "Rochdale", "short_name" : "Rochdale", "types" : [ "postal_town" ] }, { "long_name" : "Greater Manchester", "short_name" : "Greater Manchester", "types" : [ "administrative_area_level_2", "political" ] }, { "long_name" : "England", "short_name" :