You can use the log2(:Double) or log2f(:Float) methods from the documentation, available by e.g. importing UIKit or Foundation: func log2(x: Double) -> Double func log2f(x: Float) -> Float E.g., in a Playground print(log2(8.0)) // 3.0 (Edit addition w.r.t. your comment below) If you want to compute your custom-base log function, you can make use of … Read more
Swift 4.1 (and above) Updated answer: Starting from Swift 4.1, all you have to is to conform to the Equatable protocol without the need of implementing the == method. See: SE-0185 – Synthesizing Equatable and Hashable conformance. Example: struct MyStruct: Equatable { var id: Int var value: String } let obj1 = MyStruct(id: 101, value: … Read more
The operator is if case, so you can’t put parentheses. The syntax and behavior are based on those of the case statement in a Swift switch statement (see my online book if you need details). In a case statement, 20…30 is an interval, used as a pattern, which operates by using contains against the interval. … Read more
It turns out that the “private access level” complaint was regarding the initializer, not the struct. The initializer’s access level is only as accessible as the least accessible instance variable. If I make the string instance variable anything other than private, the error goes away: private struct A { let string: String // synthesized initializer: … Read more
This should work: init(_ test: Test2) { _t = State(initialValue: test) // Variable ‘self.t’ used before being initialized } @State is a property wrapper, so you need to assign value to the underlying property, thus _ .
SwiftUI (iOS 14+) NavigationView { TopLevelView { // […] } .navigationBarTitleDisplayMode(.inline) // ⬅️ Important part } SwiftUI (Xcode 11.3) SwiftUI navigationBarTitle modifier has an optional displayMode property which you can set to .inline for small titles and .large for large titles. See documentation NavigationView { TopLevelView { // […] } .navigationBarTitle(“Test”, displayMode: .inline) // ⬅️ … Read more
The reason .aspectRatio(contentMode:) had no effect on the layout is because you did not make the image resizable with resizeable(). Doing var body: some View { Image(“page-under-construction”) .resizable() .aspectRatio(contentMode: .fill) } will cause the image to be the width of the screen, but the image’s aspect ratio will not be maintained. To maintain the aspect … Read more
Use a dispatch queue to move it off the main queue like so: DispatchQueue.global().async { if CLLocationManager.locationServicesEnabled() { // your code here } }
I figured it out! An animation using .repeatForever() will not stop if you replace the animation with nil. It WILL stop if you replace it with the same animation but without .repeatForever(). ( Or alternatively with any other animation that comes to a stop, so you could use a linear animation with a duration of … Read more
For some reason I could not make work any of the above, but it did inspire me find a solution that did in my case. It’s not as flexible as others, but could easily be adapted to support both axes of scrolling. import SwiftUI struct OverflowContentViewModifier: ViewModifier { @State private var contentOverflow: Bool = false … Read more