swift5

问题 I want to set an image in the titleView of NavigationBar in SwiftUI, as we do in UIKit navigationItem.titleView = UIImageView(image: UIImage(named: "logo")) this is how we do it in UIKit. anyone know how to do it? 回答1: Here's how to do it: Add SwiftUIX to your project. Set your custom title view via View.navigationBarTitleView(_:displayMode:) Example code: struct ContentView: View { public var body: some View { NavigationView { Text("Hello World") .navigationBarTitleView(MyView()) } } } 回答2:

问题 I have checked in StackOverflow Not found any valid solution of my query. struct MyModel{ let title: String let subTitle: String let image: UIImage } Now I want to search on title and output it return mymodel filter array. suppose this is my title array. [ "Swift CollectionView Xcode 11", "Swift UITableView Xcode 11", "Swift UICollectionView Xcode 11", "Objective C UITableView Xcode 11", "Objective C CollectionView Xcode 11", "Objective C UICollectionView Xcode 11", ] If I search

问题 I have checked in StackOverflow Not found any valid solution of my query. struct MyModel{ let title: String let subTitle: String let image: UIImage } Now I want to search on title and output it return mymodel filter array. suppose this is my title array. [ "Swift CollectionView Xcode 11", "Swift UITableView Xcode 11", "Swift UICollectionView Xcode 11", "Objective C UITableView Xcode 11", "Objective C CollectionView Xcode 11", "Objective C UICollectionView Xcode 11", ] If I search

问题 Our app crash on os 10.3.3 10.3.4, iPhone 5c /5 iPad4 (armv7s 32) compiled by Xcode 11.4, swift optimization on. We find the PC register point to a hole address without virtual address and no stack information. If we close swift optimization, it works. So do anyone find the problem and any solution? It's certain that it's related to Xcode 11.4 swift optimization. I find the same question here. https://www.reddit.com/r/iOSProgramming/comments/frcpsc/xcode_114_builds_crashes_on_ios_10/ Incident

问题 Our app crash on os 10.3.3 10.3.4, iPhone 5c /5 iPad4 (armv7s 32) compiled by Xcode 11.4, swift optimization on. We find the PC register point to a hole address without virtual address and no stack information. If we close swift optimization, it works. So do anyone find the problem and any solution? It's certain that it's related to Xcode 11.4 swift optimization. I find the same question here. https://www.reddit.com/r/iOSProgramming/comments/frcpsc/xcode_114_builds_crashes_on_ios_10/ Incident

问题 Question: What are the basic rules and boundaries (in terms of syntax) that need to be considered when writing any closure in swift? 回答1: Closure Rules: If the closure block solely returns value after the 'in' keyword (or the closure block just returns a value) then using 'return' keyword is optional. Defining closure argument type is optional if the closure type is explicitly defined. Defining closure return type is optional, if closure arguments are defined with it's type and there is no

问题 Question: What are the basic rules and boundaries (in terms of syntax) that need to be considered when writing any closure in swift? 回答1: Closure Rules: If the closure block solely returns value after the 'in' keyword (or the closure block just returns a value) then using 'return' keyword is optional. Defining closure argument type is optional if the closure type is explicitly defined. Defining closure return type is optional, if closure arguments are defined with it's type and there is no

问题 I've recently tried to include Audiokit 4 in a new project using Xcode 11 and swift 5.1, but I get the error message No such module Audiokit , the closest I get to Audiokit is CoreAudiokit by following the instructions in (https://github.com/audiokit/AudioKit/blob/master/Frameworks/README.md). Here're the steps I followed: 1) Create new single view project in xcode11 2) Project settings, General tab, Frameworks/Libraries added item Audiokit.framework 3) In the ContentView.swift file: import

问题 I've recently tried to include Audiokit 4 in a new project using Xcode 11 and swift 5.1, but I get the error message No such module Audiokit , the closest I get to Audiokit is CoreAudiokit by following the instructions in (https://github.com/audiokit/AudioKit/blob/master/Frameworks/README.md). Here're the steps I followed: 1) Create new single view project in xcode11 2) Project settings, General tab, Frameworks/Libraries added item Audiokit.framework 3) In the ContentView.swift file: import

问题 After reading this article https://www.sqlite.org/rtree.html about the R*Tree in SQLite, i am currently experimenting with a 2-Dim R-Tree in a Core Data model. Particularly i expected (maybe somewhat naively) some kind of select statement on the index table but i did not see any in the SQLite debug trace when executing a fetch statement on the Region entity with indexed attributes (see predicateBoundaryIdx in the code below). My questions are: how must a Core Data model (entities, attributes)