Recent questions tagged IOS

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ios - Set custom images to the UIBarButtonItem but it doesn't show any image

I want to set custom images to the UIBarButtonItem but it only shows a rectangular box around and It doesn't show ... don't know what is wrong. 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 - ld: library not found for -lBolts using cocoapods

everybody The problem that I am having is that I can't compile my app because I got the following error: ... and re-install, clean and rebuild See Question&Answers more detail:os...

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

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745 views

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ios - Swift override function in extension

If I have a class: class Spaceship<FuelType> { function prepareForLiftoff() throws { //Start the countdown! ... the standard library functions? See Question&Answers more detail:os...

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

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458 views

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ios - Weird behaviour of Xcode 11 Debugger - Showing values as nil when there's a value

I just noticed weird behaviour of Xcode11, I am executing same code in Xcode 10 and Xcode 11. See the ... different system. Thanks in advance. See Question&Answers more detail:os...

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

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546 views

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ios - What is most common and correct practice to get a CGFloat from an NSNumber?

The working code for me is something like: NSNumber *n = @42.42; CGFloat cgf = 0; CFNumberRef cfn = ... common thing. Are there any? 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 - swift can catch fatal error?

I am trying to use Swift 2.0 try-catch. I originally had the following code override func viewDidLoad() { var obj : ... } else { return nil; } } See Question&Answers more detail:os...

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

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640 views

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ios - this class is not key value coding-compliant for the key XXXXXX

when i try to build and run my app, it crashes and i got this in the log : reason: '[< ... main and loadingView in interface builder : See Question&Answers more detail:os...

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

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510 views

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ios - Presenting UIViewController from SKScene

I am trying to present a UIViewController from SKScene but, app crashes , here is my codes : 1- : ... exception of type NSException (lldb) See Question&Answers more detail:os...

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

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801 views

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ios - SwiftUI Landmarks App Tutorial Screen Navigates Back When Toggle Favorite

I'm following this SwiftUI tutorial and downloaded the project files. I built and ran the complete project without ... back to the list 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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532 views

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ios - does MKAnnotationView buffer its input queue?

I want to display different colour pins in a UIMapView based on the relative time they represent but it seems ... If that clarifies the problem. See Question&Answers more detail:os...

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

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499 views

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ios - Swift - How Can I use 'shouldChangeTextInRange' with Firebase for real time searching?

I wonder that how creating Firebase matchesRegex query and listing current results using shouldChangeTextInRange. I have did ... ) return true } See Question&Answers more detail:os...

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

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469 views

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ios - How to send multiple parameterts to PHP server in HTTP post

I'm sending base64 string to php server and its working well. Now I want to send another parameter as a ... // here you get reasponse string See Question&Answers more detail:os...

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

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479 views

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ios - Can I restrict my iPhone app from being used by iPhone3G's?

My iphone app doesn't run well on the iPhone 3G. Can I make it so users with these models can't download ... that they can't download the app? See Question&Answers more detail:os...

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

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464 views

1 answer

ios - Application not automatically launching in device and getting error on xcode

I'm getting a weird bug on Xcode 4.5. When i tried to run my application on Ipad 2 from xcode with iOS ... be the issue ? Thanks in advance See Question&Answers more detail:os...

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

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550 views

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ios - Increase NavigationBar height

I have the following code: func navbarbutton() { UIView.animateWithDuration(0.2, animations: { () -> Void in let ... get it aligned to the top? See Question&Answers more detail:os...

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

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457 views

1 answer

ios - Firebase asynchronous function, what's in the background queue and what's not

Lets say I have this // a bunch of code... FIRDatabase.database.reference.child("somechild").observeSingleEventOfType( ... 's actually going on. See Question&Answers more detail:os...

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

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828 views

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ios - Swift - Error 'Expected ',' separator' and 'Expected expression in list of expressions'

let screenBounds = UIScreen.mainScreen().bounds var initialOrigin: CGFloat = UIScreen.mainScreen().bounds.height - ... somebody enlighten me... See Question&Answers more detail:os...

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

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660 views

1 answer

ios - SwiftUI: Sheet cannot show correct values in first time

I found strange behavior in SwiftUI. The sheet shows empty text when I tap a list column first time. It ... list first tap after second tap See Question&Answers more detail:os...

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

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537 views

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ios - How to determine the true data type of an NSNumber?

Consider this code: NSNumber* interchangeId = dict[@"interchangeMarkerLogId"]; long long llValue = [interchangeId ... or improvement.) See Question&Answers more detail:os...

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

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613 views

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ios - Switch universal app to iPhone only app

I have Universal app uploaded on app store, Later based on requirements I have decided to revamp my entire app ... Where I am making mistake? See Question&Answers more detail:os...

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

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811 views

1 answer

ios - how to get the incoming call number by using callkit

How to get the incoming call phone number programmatically by using call kit framework. i tried with ... suggestions most helpful... See Question&Answers more detail:os...

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

0 votes

732 views

1 answer

ios - Hardware-dependent NSDateFormatter dateFromString: bug (returns nil)

I have several date strings that I need to convert to NSDates. My parsing code is the following: NSString *s ... ' Am I missing something here? See Question&Answers more detail:os...

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

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1.1k views

1 answer

ios - SwiftUI DatePicker Binding optional Date, valid nil

I'm experimenting code from https://alanquatermain.me/programming/swiftui/2019-11-15-CoreData-and-bindings/ my ... (refer to Binding extension) See Question&Answers more detail:os...

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

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539 views

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ios - Using GLKMath from GLKit in Swift

So I'm using a book called iOS Games by tutorials from Ray Wenderlich and trying to utilize some of the objective ... to use in my program? See Question&Answers more detail:os...

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

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531 views

1 answer

ios - Custom class clusters in Swift

This is a relatively common design pattern: https://stackoverflow.com/a/17015041/743957 It allows you to return ... be very much appreciated. See Question&Answers more detail:os...

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

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507 views

1 answer

ios - Swift: video records at one size but renders at wrong size

The goal is to capture full screen video on a device with Swift. In the code below, video capture appears to ... size already wrong here ... See Question&Answers more detail:os...

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

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717 views

1 answer

ios - How to use call directory extension to identify a incoming call in my application?

I am working on callKit framework, I found that by the use of call directory extension, we can Identify the ... in table. Thanks in Advance. See Question&Answers more detail:os...

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

0 votes

480 views

1 answer

ios - Xcode 8.1 Push Notifications in swift 2.3 with firebase integration not getting?

I am working with Xcode 8.1 & swift 2.3 here I am using firebase integration for getting push notifications.I ... ", remoteMessage.appData) } } See Question&Answers more detail:os...

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

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