Recent questions tagged Swift

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swift - How to create NSRadioButton Group in Xcode 7 OSX

I was following this tutorial on how to create radio button group. But it seems Radio Group is no longer ... like this: Thanks very much. 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 open your app in Settings iOS 11

It seems that Apple has moved a lot of the app configurations to the App path with iOS 11, how to open the ... : NOT how to open the settings 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 - Warning: Initialization of 'UnsafeBufferPointer<T>' results in a dangling buffer pointer

After update to Swift 5.2 / Xcode 11.4 got a warning to following code: extension Data { init<T>(from value ... and clean it in the future? 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 - Initializer for conditional binding must have Optional type, not 'String'

Here is a fun issue I'm running into after updating to Swift 2.0 The error is on the if let url = ... (url) } } return false } 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 - Expected hexadecimal code in braces after unicode escape

This worked in the first beta of Swift. var degree = "u00B0" // degree symbol Now I'm getting this ... code in braces after unicode escape 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 - Dynamically change text of RealityKit entity

I have created a very simple scene ("SpeechScene") using Reality Composer, with a single speech callout object (" ... this possible? 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 - RealityKit – Adding a Material to a ModelEntity programmatically

The docs for RealityKit include the structs: OcclusionMaterial, SimpleMaterial, and UnlitMaterial for adding materials to ... other 3D software? 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 line break long large title in iOS 11?

I am trying to use the new large title system in iOS 11 using Swift. When the title gets too long (see ... .title = "Search by Name" 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 - Why to avoid forced unwrapping

There are cases where you forgot to set a value (so it's actually a bug), and running the program ... unwrapping is suitable for everything.) 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 - Creating a generic singleton

This is a bit of a head banger (for me). Basically I want to have 2 different singletons that inherit from ... be lost between doom and death. See Question&Answers more detail:os...

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

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961 views

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swift - How to make a grouped BarChart with ios-charts?

I am using ios-charts library. I would like to group my inverter values so that each year is one group. ... Thanks for any hint on 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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swift - How to set top left and right corner radius with desired drop shadow in UITabbar?

I've spent almost a couple of hours to figure it out. However, it did not happen and finally, I had to ... little nervous and curious about 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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940 views

1 answer

swift - Facebook login shows an additional confirmation popup on iOS 11

I have implemented login through facebook using facebook SDK for swift. It works as expected on iOS 10.3, but ... GitHub. Still does the same. 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

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swift - SwiftUI Beta 3 Black Screen

I just converted to beta 3 and my previously working SwiftUI code is now rendering a plain black screen. ... window window.makeKeyAndVisible() } See Question&Answers more detail:os...

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

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867 views

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swift - Keyboard overlaying action sheet in iOS 13.1 on CNContactViewController

This seems to be specific to iOS 13.1, as it works as expected on iOS 13.0 and earlier versions to ... performed and keyboard is not dismissing. See Question&Answers more detail:os...

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

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970 views

1 answer

swift - Getting Optional("") when trying to get value from KeyChain

When I try to get my keyChain value, it return a string containing: Optional("[thing in the KeyChain]") ... -ios-keychain-swift-save-query/ 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 - After updating to iOS 13 suggestion(email, phone number, first name...) for UITextField don't appear above keyboard

After updating device to iOS 13 input suggestion for inputField(UITextField). Like email, phone number, first ... = .emailAddress and 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 - SwiftUI: Prevent Image() from expanding view rect outside of screen bounds

What I'm trying to achieve I'm trying to create a SwiftUI view where an image should expand the entire screen ... view only fill the screen? See Question&Answers more detail:os...

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

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957 views

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swift - iOS XCUITests access element by accessibility

How do I assert a button exists by his accessibilityLabel or identifier? func testExitsButton() { XCTAssertTrue( ... the accessibilityLabel? } 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

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swift - How to open settings app programmatically?

I'm using swift with ios 8.3. I want to open settings app from my application. I know that using the code ... Is there any way to acheive 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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1.1k views

1 answer

swift - What's the difference between if nil != optional … and if let _ = optional …

I need to test if an expression which returns an optional is nil. This seems like a no-brainer, but here is the code ... }) ?? false { } See Question&Answers more detail:os...

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

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908 views

1 answer

swift - Get object at index in Set<T>

In Swift 1.2 there is a Set object, which you can use to create a static typed Set. I cannot find out how ... a SetIndex with a certain 'index'? 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

1 answer

swift - How to simulate mouse click from Mac App to other Application

I am trying to simulate mouse click on iphone simulator from macos App for that I am using CGEvents . ... 33554) keyboardUp?.postToPid(33554) 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 hide labels in ios-charts?

I need disable some elements from my chart. I used the iOS-charts library in (Swift 2), however I can' ... color square Hide all vertical lines 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

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swift - Class CKBrowserSwitcherViewController overrides the -traitCollection getter... What this message means?

[TraitCollection] Class CKBrowserSwitcherViewController overrides the -traitCollection getter, which is not supported. If you' ... the latter. See Question&Answers more detail:os...

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

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912 views

1 answer

swift - Add Instagram to UIActivityViewController

I'm trying to share an image using standard UIActivityViewController, it's fine to share on Facebook, Twitter and ... Is it possible at all? 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 - AVAudioEngine crashes when plug headphones in or out

I'm testing my audioApp on my iPhone6 Plus, and it crashes after plug headphone in or out. ... uncaught exception of type NSException 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 - How to open a NSPopover at a distance from the system bar?

I'm opening a NSPopover with the action of an icon in the status bar. myPopover.show(relativeTo: button.bounds ... distance from the system bar? See Question&Answers more detail:os...

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

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