xcode

问题 I got a simple SwiftUI view: import SwiftUI struct AddItemView: View { @State private var title = "" @State private var date = Date() var body: some View { Form { Section { TextField("Title", text: $title) DatePicker( selection: $date, in: Date()..., displayedComponents: .date, label: { Text("Date") } ) } } } } struct AddItemView_Previews: PreviewProvider { static var previews: some View { AddItemView() } } I am trying to achieve the following: If DatePicker is expanded (user tapped date

问题 I currently have two separate text fields in my app and I am trying to change it to only one. The text fields are used for inputting currency (one for pound, dollar, euro etc. and one for pence, cent etc.) and they work fine, however I need to add some functionality that won't be possible unless I use a single text field. Plus, I think a single text field is more user friendly. Basically I would like to have a text field that formats in real time in currency form localised for the user while

问题 I have imported my universal custom iOS framework to a new sample project. The sample program can be built in simulator and execute without problems. However Xcode returns 'No such module ' when I try to archive or build the project in Generic iOS Device. Does anyone know how to fix this problem? Update: 2015-10-17 17:55 Finally I found that the script I wrote to to create the universal framework does not include arm and arm64. And it causes Xcode unable to build the project in archive or

问题 I am trying to archive and distribute my ios app but out of nowhere it just stopped working. I have deployed my app many times and also had this problem before because xcode somehow creaded some bad xml lines in my project.pbxproj file, but eventually I edited the xml source code and it was ok (app archive and upload/distribution to AppStore). Now xcode is showing my new created archive in "Other items" sections and i cannot upload to AppStore. I opened the archive and I noticed that key

问题 I have done it like this but it always give the error: error: use of undeclared identifier 'self' error: 1 errors parsing expression 回答1: I don't believe that you can access any symbolic information from a breakpoint inside the UIKit framework, because there is no debugging information available. If you set a breakpoint and allow the debugger to open you will see you are just presented with some assembler code and a set of registers. You can set a breakpoint for a specific UIViewController

问题 I'm using Xcode 4.5.2. When I build and debug I see in the Xcode debug panel many dozens or hundreds of lines like each of the following sample lines: dyld: loaded: /Developer/Library/PrivateFrameworks/GPUTools.framework/libglInterpose.dylib dyld: loaded: /Developer/usr/lib/libXcodeDebuggerSupport.dylib dyld: loaded: /System/Library/Frameworks/CoreText.framework/CoreText and this: dladdr(0x33a1f000, 0x1e54d318) dlopen(/System/Library/PrivateFrameworks/GameKitServices.framework/Frameworks

问题 I'm trying to get the dimensions of a displayed image to draw bounding boxes over the text I have recognized using apple's Vision framework. So I run the VNRecognizeTextRequest uppon the press of a button with this funcion func readImage(image:NSImage, completionHandler:@escaping(([VNRecognizedText]?,Error?)->()), comp:@escaping((Double?,Error?)->())) { var recognizedTexts = [VNRecognizedText]() var rr = CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height) let requestHandler

问题 I'm trying to get the dimensions of a displayed image to draw bounding boxes over the text I have recognized using apple's Vision framework. So I run the VNRecognizeTextRequest uppon the press of a button with this funcion func readImage(image:NSImage, completionHandler:@escaping(([VNRecognizedText]?,Error?)->()), comp:@escaping((Double?,Error?)->())) { var recognizedTexts = [VNRecognizedText]() var rr = CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height) let requestHandler

问题 How can I draw a series of IOSurfaces to another then draw it to the screen? I've played around with some source from apple in the MultiGPU sample project, but the best I managed to do is draw a white screen or get tons of artifacts and crash the app. I'm very new to openGL and I don't quite understand the binding of framebuffers and textures and how they interact with IOSurfaces. This is what I have to create a texture from an IOSurface (directly from Apple's source) // Create an IOSurface