Recent questions tagged Swift

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Consider this class in Swift: class Zombie: Monster { var walksWithLimp = true final override func terrorizeTown ... before the function header? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Show NSMenu only on NSStatusBarButton right click?

I have the following code: (can be copy-pasted to New macOS project) import Cocoa import SwiftUI @NSApplicationMain ... behaviour with new API? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Autoplay YouTube videos in WKWebView with iOS 11

I want to have small YouTube player in my app. The only way i found to be recommended is embeding web ... Or use another YouTube player url? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - How to restrict a protocol to value types only?

Similar in spirit to this question, except, instead of limiting a protocol to only classes, I want to be able ... etc.. Is this possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - How customise Slider blue line in SwiftUI?

Like in UISlider let slider = UISlider() slider.minimumTrackTintColor = .red See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Variable 'xxx' was never mutated, consider changing to 'let'

Updated to xcode7-beta I run across a new kind of warning. Here is my code override func ... a good thing right? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Turn off Xcode's unused variable warnings while typing

I'm sick to death of Xcode's prolific use of live "unused variable" warnings while I am typing. I keep ... -wide or for an entire project? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - zlib streams in iOS 11 Vision Framework barcodes sometimes decompress, sometimes don't

I'm working on a barcode scanner app (Swift 3+) that uses the new Vision Framework in iOS 11, specifically VNBarcodeObservation and ... ca 7b f1 f9 52 29 fc 13 d3 31 8c c...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Add SKReferenceNode/SKScene to another SKScene in SpriteKit

I would like to add a SKScene to my main GameScene. SKReferenceNode seems to be a good solution. I have : - ... to use the Xcode scene editor. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Bool being seen as int when using AnyObject

I am using a list of params of type Dictionary<String,AnyObject> in a Swift iOS application to hold some ... Dictionary<String,AnyObject> as. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Can't understand how collision bit mask works

I am trying to use collision bit masks and contact test bit masks in Swift, I want two objects not to ... happening anyway ? Thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Rotate an object in its direction of motion

Is there a relatively simple way to rotate SKSpriteNode so that it is always facing the direction it is moving? My ... wasn't working before ^^ See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - SwiftUI 2: the way to open view in new window

Lets imagine that I have an App var storeVM = BookStoreViewModel(bla1: bla1, bla2: bla2, bla3: bla3) ... I not using the NavigationView. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - How to update text using timer in SwiftUI

I have text in view now i want to update that text using alert on every second. Here is code i have done. ... "), displayMode:.automatic) } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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swift - Change background color of TextEditor in SwiftUI

TextEditor seems to have a default white background. So the following is not working and it displayed as white ... color to a custom one? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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899 views

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swift - Angled Gradient Layer

I have custom UIView class that renders a gradient in Swift 2. I'm struggling with making an angled gradient so that it ... = [0.0, 1.0] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - How to move to next TextField in SwiftUI?

Using Swift5.1.2, iOS13.2, Xcode-11.2, Having several TextFields in a Stackview, I would like to move to ... a solution to this with SwiftUI ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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846 views

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swift - Depth Page transform on iOS

I am trying to create a animation like of Facebook Menu Slide Down Animation of POP framework or exactly like of ... project I am working on See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Protocol extension on an ObjC protocol

I have an Objective-C protocol which is used by mostly objective-C objects and one or two Swift objects. I ... classes that use the protocol? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - SwiftUI: Sizing a popover to fit

I've got a little popover sample in which a button triggers a popover. The popover only contains a little bit ... } } } Screenshot from macOS: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - RxSwift map and flatMap difference

I can't understand the difference between map and flatMap In RxSwift. In the RxSwift playground examples and the ... }) student.onNext(ryan) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Activate a window using its Window ID

How would I programmatically activate i.e move-to-front-and-focus a window on macOS (not belonging to ... or CGWindow buried somewhere? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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swift - AVCaptureVideoDataOutput captureOutput not being called

I'm trying screen capture on a Mac with AVCaptureScreenInput, but AVCaptureVideoDataOutput delegate captureOutput is never ... capture") } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Load data from json using UIPickerView

My Current View Controller is like this import UIKit import Alamofire class ViewController: UIViewController , ... Please help!!! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - How to use Raycast methods in RealityKit?

There are three ways about Detecting Intersections in RealityKit framework, but I don't know how to use it in ... Entity?) -> [CollisionCastHit] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

swift - AudioKit (iOS) - Add observer for frequency / amplitude change

I'm using the AudioKit framework for developing a small application that is able to listen for the microphone input ... thankful for some help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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975 views

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swift - Firebase Firestore - OR query alternative

In this question Firebase Firestore - OR query they said there is no OR query. This means I can't easily ... stick with my decision for now. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - extend generic Array<T> to adopt protocol

Let's say I've defined such a protocol: protocol EuclideanPoint { func distance(other: Self) -> Double ... conform to protocol 'EuclideanPoint' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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