Recent questions tagged Swift

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swift - How can I avoid nested Navigation Bars in SwiftUI?

Using SwiftUI, I've built a NavigationView that takes the user to another NavigationView, and finally, to a simple ... know how to solve this? See Question&Answers more detail:os...

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

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1.5k views

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swift - Setting statusbarStyle (deprecated in iOS 9.0)

Just downloaded the new xCode 10.0 and saw that the old statusBarStyle has been deprecated since iOS 9.0. Warning: ... // Set to default } } See Question&Answers more detail:os...

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

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977 views

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swift - How to hide status bar of a single view controller in iOS 9?

In a ViewController, which I presented modally, I did this: override func prefersStatusBarHidden() -> Bool { ... for this view controller? See Question&Answers more detail:os...

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

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1.5k views

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swift - Why can the keyword "weak" only be applied to class and class-bound protocol types

When I'm declaring variables as weak in Swift, I sometimes get the error message from Xcode: 'weak' may only ... What is the reason behind it? See Question&Answers more detail:os...

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

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952 views

1 answer

swift - scrollToRowAtIndexPath with UITableView does not work

I have in iOS8 a table view like this: tableView = UITableView(frame: view.bounds, style: .Plain) view.addSubview( ... , but it does not work. See Question&Answers more detail:os...

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

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765 views

1 answer

swift - iOS. How to enable and disable rotation on each UIViewController?

I have an UIViewController, I want to disable or enable rotation of the screen in different scenarios Example: if flag { ... How can I do that? See Question&Answers more detail:os...

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

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909 views

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swift - setStatusBarHidden(_:withAnimation:) deprecated in iOS 9

I see that in iOS 9 setStatusBarHidden(_:withAnimation:) is now deprecated and the documentation says to use [ ... bar with a slide animation? See Question&Answers more detail:os...

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

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1.9k views

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swift - Get index in ForEach in SwiftUI

I have an array and I want to iterate through it initialize views based on array value, and want to perform ... for this? Thanks in advance. See Question&Answers more detail:os...

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

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948 views

1 answer

swift - Cannot load underlying module for XCTest

I'm working in swift on Xcode and by default it creates a test file that references XCTest. When I set ... properly and everything works fine. See Question&Answers more detail:os...

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

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804 views

1 answer

swift - iOS 12 specific problem: Core Data External Storage Binary Data corruption

I've spent the better part of a workday trying to solve this. Background I have a simple core data ... description of a resonable workaround. See Question&Answers more detail:os...

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

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850 views

1 answer

swift - Today Extension Failed to inherit CoreMedia permissions from

I am trying to add a Today Extension in Swift to my Objective-C app. I keep getting this ... completionHandler(NCUpdateResult.NewData) } See Question&Answers more detail:os...

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

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806 views

1 answer

swift - Child View Controller to Rotate While Parent View Controller Does Not

What I am Trying to Do: Parent View that is managed by Parent View Controller SHOULD NOT ROTATE. Child View ... to achieve this behavior.... 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 - How to detect vertical planes in ARKit?

How is it possible to implement a vertical plane detection (i.e. for walls)? let configuration = ... = .horizontal //TODO See Question&Answers more detail:os...

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

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973 views

1 answer

swift - Open AppStore through button

Could you guys help me to translate the following code into Swift? [[UIApplication sharedApplication] openURL:[NSURL ... ?) Thanks in advance! See Question&Answers more detail:os...

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

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1.0k views

1 answer

swift - Round up double to 2 decimal places

How do I round up currentRatio to two decimal places? let currentRatio = Double (rxCurrentTextField.text!)! / ... text! = "(currentRatio)" 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 - Pull down to refresh data in SwiftUI

i have used simple listing of data using List. I would like to add pull down to refresh functionality but i am not ... (Text("Featured")) } } } See Question&Answers more detail:os...

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

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714 views

1 answer

swift - iOS UI Testing On an Isolated View

I'm trying to incorporate UI tests in my iOS project, but one thing that continues to hold me up is ... philosophy behind UI tests completely? See Question&Answers more detail:os...

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

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929 views

1 answer

swift - Select multiple rows in tableview and tick the selected ones

I'm loading a tableView from a plist file. This works with no problems. I just simply want to "tick" the selected rows ... )!") //PPP } } } See Question&Answers more detail:os...

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

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843 views

1 answer

swift - SwiftUI: Global Overlay That Can Be Triggered From Any View

I'm quite new to the SwiftUI framework and I haven't wrapped my head around all of it yet so please bear ... be appreciated. Thanks in advance! 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 - i can select time at date picker when i get value from that in UTC so how to convert UTC time to GMT+05:30 to date?

var timeReminder = Date() let dateFormReminder = DateFormatter() dateFormReminder.calendar = Calendar.current dateFormReminder. ... 12:00 +0000 See Question&Answers more detail:os...

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

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768 views

1 answer

swift - Convert generic free function into Array extension

I wrote some code to perform run length encoding and decoding. I have my encoding function as a method in an extension ... count: $0.count)} } } See Question&Answers more detail:os...

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

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732 views

1 answer

swift - implicit return in a closure causing an error

Error: Cannot convert the expression type (String, MyType) to () From the following code Test(method: {[weak self] ... ) { println(message) } } 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

1 answer

swift - Missing return in a function expected to return 'Double?'

I'm grinding through Apple's App Development with Swift book and I have been having a few issues with the ... there a more elegant solution? See Question&Answers more detail:os...

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

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1.0k views

1 answer

swift - Block scroll down in ScrollView - SwiftUI

How can I block scroll down and only allow scroll up in order to avoid seeing the white space over the rectangle on top ... ) Spacer() } } } } See Question&Answers more detail:os...

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

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920 views

1 answer

swift - I keep getting a SIGABRT error when trying to read my firebase database and create an array of objects with its contents. What am I doing wrong?

I did all of the SDK stuff that firebase told me to do like added their plist file and doing stuff in my ... repoArray } } Thank you :) See Question&Answers more detail:os...

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

0 votes

675 views

1 answer

swift - How do I retrieve a random object from Firebase using a sequential ID?

I'm looking for an easy way to query my database in firebase using swift to retrieve a random object. ... preferably. My Database structure: See Question&Answers more detail:os...

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

0 votes

998 views

1 answer

swift - UISearchBar in UITableView header layout issue in iOS 14

I am using the new UISearchController with searchbar inside tableview header.Everything works fine in ... searchController = searchController See Question&Answers more detail:os...

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

0 votes

707 views

1 answer

swift - Read Data Firebase assign value

I want to assign the data I have read in the Firebase database to the values I have given in the ... , deviceRoom3, deviceRoom4, deviceRoom5] See Question&Answers more detail:os...

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

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