Recent questions tagged iOS

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ios - Cannot install cocoa pods after uninstalling, results in error

I removed cocoa pods because it claimed it had installed, but kept saying the command pod wasn't found afterward. ... /usr/bin/pod Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - How to create an Empty Application in Xcode without Storyboard

Xcode6 has removed the Empty Application template when creating a new project. How can we create an empty ... like in earlier versions? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - What's the difference between all the Selection Segues?

Show Show Detail Present Modally Popover presentation Custom What is the difference between them? I couldn' ... -storyboard/StoryboardSegue.html See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - setNeedsLayout vs. setNeedsUpdateConstraints and layoutIfNeeded vs updateConstraintsIfNeeded

I know that the auto layout chain consists in basically 3 different process. updating constraints layout views (here is ... on the parent view? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Valid file path for archiverootobject and unarchiverootobject

I am making an iPhone app and in a previous question I was told that I needed a valid file path for ... still works would anyone know why? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Passing Image to another View Controller (Swift)

I'm trying to move a user uploaded image from one UIImageView to another UIImageView on a different View ... = browsingImage.image } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Module compiled with Swift 5.1 cannot be imported by the Swift 5.1.2 compiler

I have a framework (in this instance it's RxSwift) which I've compiled using Xcode 11.0 into the traditional ... compiled with Xcode 11.0? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Moving views with constraints

I have a couple views in my view controller that move up when an up swipe is detected then down when a down swipe is ... 568 //(568/1.680) = 338 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Does App Store reject submission if NSAllowsArbitraryLoads set to YES?

The new ATS involved by iOS 9 cause lots of http related functionalities stop working. I have to add all the ... has been set to YES? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Why can't I force landscape orientation when use UINavigationController?

I find many question to force UIViewController to landscape as default: How to force a UIViewController to ... = self.viewController; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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203 views

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ios - Calculating convexityDefects using OpenCV 2.4 in c++

I'm using OpenCV 2.4 to calculate the convex hull of a image. I'm also doing some processing to remove ... , CV_32S) > 2) in convexityDefects See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - How to force a HKQuery to load the most recent steps counts?

Currently I'm trying to use HKStatisticsQuery to get the steps count between a certain time interval. I'm ... none of these attempts worked. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Using Map in Swift to Change Custom Struct Properties

I have the following struct defined. struct Person { var firstName :String var lastName :String var active :Bool } ... = false return p1 } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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249 views

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ios - Install apps on device without iTunes

iTunes just dropped all the app syncing on iTunes 12.7.166. So, how can we install release or Ad Hoc ... with Xcode on the designated devices? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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298 views

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ios - How to add the WeChat API to a Swift project?

I'm trying to add WeChat sharing functionality to my project. However the SDK files, documentation, development ... are to Chinese resources. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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230 views

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ios - Can I change app icon programmatically

I have two app icons built-in (free and premium), is it possible to replace free icon to premium ... -app purchase is completed successfully? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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246 views

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ios - Swift - Get local date and time

How can I get local date and time in Swift? let last_login = String(NSDate.date()) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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259 views

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ios - How do I add different types conforming to a protocol with an associated type to a collection?

As an exercise in learning I'm rewriting my validation library in Swift. I have a ValidationRule protocol that defines what ... thing: [F]) { } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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203 views

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ios - Create PDF with multiple pages

I need to implement a functionality of creating pdf with multiple pages of a text. class PDFCreator { func ... much appreciated. Thank you. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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532 views

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ios - How can I show alertview with activity indicator?

I want to show alertview with message: "Loading data" and spinning activity indicator. How can I do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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431 views

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ios - NSData won't accept valid base64 encoded string

I'm implementing JSON Web Token authentication on the iOS (7) cient-side. It's working nicely. My app rceives tokens ... 'm all ears! Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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533 views

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ios - Cannot use instance member within property initializer

I have written a custom UIView and I found a strange problem. I think this is related to a very fundamental ... bounds out of the func draw See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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356 views

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ios - Swift 3 - How to make timer work in background

i am trying to do an application which can make a timer run in background. here's my code: let taskManager = ... not in background. pls help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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423 views

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ios - Open Mobile Safari from a Link in a WebView

Is there a URI scheme to open Mobile Safari to a specific URL? e.g., <a href="safari://open_url/?url=google.com">Open Google in Safari</a> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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419 views

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ios - Using JSONEncoder to encode a variable with Codable as type

I managed to get both JSON and plist encoding and decoding working, but only by directly calling the encode/ ... Data where Value : Encodable See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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201 views

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ios - Xcode 11: Canvas does not show up

I′m trying to get the new Canvas feature from Xcode 11 running, but the Canvas won′t show up. What am I doing ... else does need to be done? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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204 views

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ios - Why Is UITextField.text An Optional?

It starts out as an empty string instead of nil. Even when it is explicitly set to nil it remains an empty string. ... // prints "Optional("")" See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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318 views

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ios - Getting a normal looking unicode down arrow in a UILabel like this ?

I would like to get a down arrow to display inside a UILabel. Specifically ? Unicode: U+2B07. This is show ... gloss. Has anyone seen this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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