viewcontroller

问题 I have inserted a table view on my view controller and I was wondering how can I give the cells in the table view a gradient background? Can I edit each cell individually to give it a different color gradient background for each cell? For example, each cell is labeled after an index in the trainingLevels array, how could I make to where each has a different color gradient background? Here's my code: import UIKit class ViewController: UIViewController, UITableViewDelegate,

问题 I'm currently building an app with a modal view popping up that contains a WkWebView. When I want to upload an image within this modal view and the Photo Selection appears, the modal view just dismisses back to the view controller that fired it up. How can I prevent that? import UIKit class PostWindow : UIViewController { @IBAction func close(sender: AnyObject) { dismissViewControllerAnimated(true, completion: nil) } override func viewDidLoad() { super.viewDidLoad() // do stuff here let

问题 I really need some more help! I am trying to pass an array from one view controller to another. I think the latter being a 'child' view controller? My code is as follows: MainViewController.h: #import <UIKit/UIKit.h> #import <AudioToolbox/AudioToolbox.h> #import <AVFoundation/AVFoundation.h> @interface HelloWorldIOS4ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource, UITextFieldDelegate, AVAudioPlayerDelegate> { NSMutableArray *countProductCode; UIPopoverController

问题 I have a few moving parts in this one that I can't seem to stitch together, hopefully it is pretty straightforward. Previous questions don't use a subclass and in this example there could be dozens of custom pins on the map and each pin passes specific variables to a new ViewController Three Goals: Add image to custom annotation (see code below) I have a subclass named Capital , I would like to add the image in #1 and then create additional variables to hold values that will be passed to a

问题 I have system "NavigationViewController -> MyViewController", and I programmatically want to present MyViewController inside a third view controller. The problem is that I don't have navigation bar in MyViewController after presenting it. Can you help me? var VC1 = self.storyboard.instantiateViewControllerWithIdentifier("MyViewController") as ViewController self.presentViewController(VC1, animated:true, completion: nil) 回答1: Calling presentViewController presents the view controller modally ,

问题 A common way to dismiss a modal is to swipe down - How do we allows the user to drag the modal down, if it's far enough, the modal's dismissed, otherwise it animates back to the original position? For example, we can find this used on the Twitter app's photo views, or Snapchat's "discover" mode. Similar threads point out that we can use a UISwipeGestureRecognizer and [self dismissViewControllerAnimated...] to dismiss a modal VC when a user swipes down. But this only handles a single swipe,

问题 This question already has answers here : How to detect user inactivity since last touch on a particular viewcontroller in iOS? (2 answers) Closed 4 years ago . I need to implement an Idle Time Out feature. To do that I simply need to know how to detect when the user touches the screen (something similar to onUserInteraction method used in Android). So how can I simply discover when the user interacts with the ViewController? P.S: if I ask this it is because you can't find nothing good in the

问题 Wanna pass data from a ViewController which has TableView init, to another ViewController. But it's showing me the error "Ambiguous reference to member 'tableView(_:numberOfRowsInSection:)' " @IBOutlet weak var completedCaseTableView: UITableView! override func viewDidLoad() { super.viewDidLoad() completedCaseTableView.delegate = self completedCaseTableView.dataSource = self // Do any additional setup after loading the view. } public func numberOfSections(in tableView: UITableView) -> Int {

问题 I want to use the value that I received after tapping a UITableCellView. I stored the value into arrays, and defined the instance of the ViewController of UITableCellView in order to reach those arrays. Even though I can reach the arrays from the other ViewController, it always write "0" as a result to the textfield I want to have the data. I need the exact data stored in the array. Here is the code how I tried to do it; (fourthViewController) - (void)tableView:(UITableView *)tableView

问题 I am adding a ViewControllers view as a subView to another ViewController, Example : In FirstScreen viewcontroller i do this, [self.view addSubview:self.secondScreen.view]; And Once i remove it from FirstScreen i do this [self.secondScreen.view removeFromSuperView]; self.secondScreen=nil; But While Adding the subView ViewDidLoad method is called but while removeFromSuperView ViewDidUnLoad is not called. My Question 1) will all my objects in my secondScreen will get deallocated once i set the