storyboard

问题 environment: Xcode 6.1.1 ;Storyboard issue： I'm creating some list with UITableView embed in a UIViewContrller instoryboard ,and all the cell can't be selected by click,but can be selected by long press unexpectedly. I don't know why and I can't figure it out . I hope someone help me . Thinks. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { HBillCell *cell = [tableView dequeueReusableCellWithIdentifier:@"billCell"]; [cell loadInfo:self

问题 I am getting one weird issue, I am setting constraints on the view using storyboard as below: But if I am accessing all applied constraint by code then always getting zero (0). for self.view it's returning the constraint but for yellow view getting zero. 回答1: Use this code (Swift 4+ and Xcode 9.4.1) import UIKit class ViewController: UIViewController { @IBOutlet var subView: UIView! override func viewDidLoad() { super.viewDidLoad() print(self.view.getAllConstraints().count) print(self.subView

问题 I have tried for 2 days now to get my storyboard to display with this code: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; UIViewController *LoginViewController = [storyboard instantiateInitialViewController]; self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; self.window.rootViewController = LoginViewController;

问题 I have this two controller liked by segue: My problem is that: when I tap on selected table view'cell in general I have to follow the segue and so go to other controller , but if a specific condition is true I have to show ad alert view and so I don't follow the segue and so don't go to those controller. In this way when I tap on selected cell I go always on the other controller. How do I solve this problem? 回答1: if you override this function segue wont continue if you return false, this

问题 AutoLayout is adding a NSAutoresizingMaskLayoutConstraint that causes a conflict, and it's unclear where and how. The question is: where does the height of 293 come from? UIView hierarchy: The AutoLayout log has been numbered. Xcode labels didn't show up in the AutoLayout logs. Line 1 seems to be the trouble. Based on the constraints, it seems this is Post View Cell , which is a custom UICollectionViewCell . Yet the sizeForItemAt UICollectionViewDelegate function does not return this value.

问题 I would like to utilize a Storyboard object to invoke methods at specific times. Specifically; I am trying to make a fireworks display, with a Firework user control that has a Fire method. I want to create several of these controls and call their Fire methods at specific times (just like a real show). Normally, you would use a Storyboard to animate properties of an object over time. Is there a way to invoke a method instead? Something like (pseudo-code of course): <Storyboard>

问题 I've read about 10 different posts like this one and they all suggest doing it in your app delegate with code. Is it even possible to change it from within the storyboard? 回答1: For some reason that I'm not clear on, the standard Tint properties in the Attributes Inspector have no effect. However, if you select the tab bar and open up the Identity Inspector, you can add a custom User Defined Runtime Attribute with a Key Path of tintColor , set its type to be Color, and then specify the color

问题 I have a LongListSelector which is populated with some items. Each item has a submenu which can be visible or collapsed using a sliding animation. The problem is that the animation is extremely slow depending on which item you tap in the list. At the start and the end it's slow, in the middle it's smooth. I suspect that each animation frame invalidates the longlistselector which means the entire visual tree must update it's layout. I use a datatrigger to start the animation. Because of that I

问题 I am looking a way to animate the resizing of a window, lets say that I have a window with Height=300 and Width=300, I have 2 buttons, when I click the first button the window size must change to Height=600 and Width=600 and when I click the other button the window size must back to the original size, well I can do this simply changing the Height and Width properties, but I would like to use something like Storyboard - DoubleAnimation to give the impression that the window size is changing

问题 So if you create a UISplitViewController with 'MasterView' and 'DetailView' setup like this in the 'MasterView' in portrait on the iPhone 6 Plus you push/show 'MasterView2' by pressing the item button and then you rotate the device I would expect to see this - 'MasterView2' | 'DetailView' but instead I get 'MasterView' | 'MasterView2' How should this be setup so on rotating the iPhone 6 Plus I get the expected 'MasterView2' | 'DetailView'? 回答1: for anyone interested here is how I solved the