xcode

问题 I am working on a game in which a character runs along the screen and the camera is following the character. For each scene I add all the required assests and place them on scene. I do this behind a loading screen, because SceneKit needs some time to put all the stuff on scene. After like 5 seconds I fade out the screen (which is basically a black UIImage that lays in front of everything) and the game starts. Depending on the current scene, the amout of memory required is between 200MB and

问题 I'm trying to retrieve my peripheral's Firmware Revision String. When Interrogating my peripheral through the app "LightBlue" I'm able to view the Device Information which includes: Manufacturer Name String Firmware Revision String However, in my code I'm unable to discover the characteristic for Firmware Revision String. I've tried the following UUID's: 2A26 0x2A26 2a26 0x2a26 How do I go about retrieving the Firmware Revision String? 回答1: You need to first discover the relevant CBService.

问题 This particular view is part of a UINavigationController, so the navigation bar is provided by that. I call the following code in viewDidLoad() of the presenting view controller. func buildSearchBar() { self.definesPresentationContext = true let searchController = UISearchController(searchResultsController: nil) self.navigationItem.searchController = searchController self.navigationItem.hidesSearchBarWhenScrolling = false self.navigationController?.navigationBar.barTintColor = UIColor

问题 The project is Objective-C based. The project was building previously building successfully, but now when I try to build, I'm getting the above error. I've seen some posts here with similar issues, but those errors specify permissions errors or give messages like 'no such directory', whereas mine does not, and their solutions do not resolve my problem. In fact, the error message I receive has almost no detail at all: MkDir /[PATH_TO_APP]/[APP_NAME].app (in target '[TARGET]' from project '

问题 I'm using CoreData for persistence and would like to use a NSFetchRequest with an NSExpression(forFunction: "sum:" ...). I have three Entities Entity A: name: String value: Int64 Entity B: name: String Entity C: relationship1: A relationship2: B value: Int64 I have a separate Entity for a relationship between an A- and an B-Entity, because a relationship also has an Int64 Value. I guess this is the easiest solution not to sum up one attribute of a given set of Cs (using a NSPredicate to

问题 I’m making a web browser using Xcode, I played with the browser then relized the it dosn’t play full screen youtube video’s and embeded videos. I have tried this code... let webViewConfiguration = WKWebViewConfiguration() webViewConfiguration.allowsInlineMediaPlayback = false WKWebView(frame: .zero, configuration: webViewConfiguration) But it says Wkwebview has no member of allowsInlineMediaPlayback. This is an image of what youtube shows Here is my code for more detail… import Cocoa import

问题 I am trying to add scrubber to command center lock screen, I am getting this error Cannot assign to value: function call returns immutable value I don't know what it means. Any help would be appreciated. This is how I am trying to change the position commandCenter.changePlaybackPositionCommand.addTarget(handler: { (event) in let event = event as! MPChangePlaybackPositionCommandEvent self.player.currentTime() = event.positionTime // ERROR return MPRemoteCommandHandlerStatus.success }) 回答1: I

问题 I have looked at multiple ways to change the orientation (rotate 90degrees) of an AVPlayer/AVPlayerLayer. The most common way I found was to do this: playerLayer.setAffineTransform(CGAffineTransform(rotationAngle: CGFloat.pi / 2)) This what it looks like when I do that (on aspectfill): As you can see, this doesn't work for me and I think it's because of the changes in xcode and swift over the years. How would you rotate the AVPlayerlayer 90degrees now? Thanks in advance! Code used for

问题 I was download my website from online to store in xcode project with a sub-folder and want to run in WKWebView locally. I found the webview loaded webpage miss all CSS/JS/Images resources. I search around the internet and still not working. Is webpage inside relative url incorrect or my code to get the Main Bundle location problem? Anyone can help. Thanks. Xcode Project Structure HTML Page Contents Sample I wrote this code to load WKWebView let htmlFile = Bundle.main.path(forResource:

问题 In My Application I have a Information Screen In that i am displaying related information. I have a Total 4 pages Text. In the Text There are Several Paragraphs with Bold headings and Some Bullet points are there For Example : My Text is looks like this : This is Heading This is Paragraph Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and