Recent questions tagged iOS

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ios - ios10, Swift 3 and Firebase Push Notifications (FCM)

I am struggling to display my push notifications that I am sending to my device from the FCM notification ... would be greatly appreciated. See Question&Answers more detail:os...

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

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ios - Setting a background image/view to live camera view?

Is it possible to set a background for a particular view controller to show a live camera view? If so, ... direction to make this possible? See Question&Answers more detail:os...

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

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ios - Make a custom back button for UINavigationController

I'm developping an app for iOS 4.2+. I subclassed my UINavigationController to insert two UIImageView and ... ]initWithCustomView:backButton]; } See Question&Answers more detail:os...

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

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ios - how to make dynamic width of the UICollectionViewCell

I want to set the width of UICollectionViewCell dynamically. I found some code in swift and I want the code ... cellWidth, height: cellWidth) } See Question&Answers more detail:os...

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

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580 views

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ios - reload/refresh subViews - setNeedsDisplay doesnt work

i have trouble with setNeedsDisplay. I have an UIView with a lot of sub UIViews, created in Inteface Builder. ... method have solved my problem. See Question&Answers more detail:os...

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

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417 views

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ios - Using timer in a tableview re creates the timer after any scroll or table reload

I'm using https://github.com/mineschan/MZTimerLabel/ and in my Tableview cellForRowAtIndex using the timer like ... Appreciate any help, Elias See Question&Answers more detail:os...

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

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ios - How to attach Xcode view debugger to the simulator launched from Visual Studio?

Xcode has a view debugger tool that allows to inspect view hierarchy. I am working on iOS Xamarin app and would ... hierarchy of a Xamarin app? See Question&Answers more detail:os...

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

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ios - why do you have to remove observer in ios8?

After reading this post for iOS 9, I know that you don't need to removeObserver anymore. However for iOS 8 ... What am I not understanding? See Question&Answers more detail:os...

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

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ios - HKWorkoutSession: Not getting Heart Rate when screen is turned off in watchOS 2

I am using iOS 9 beta 4 and watchOS 2 beta 4. I can't seem to get any heart rate data when the watch ... the screen on the watch is locked. See Question&Answers more detail:os...

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

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ios - Making the tab bar scrollable in iphone?

I have an Iphone application in which I had 10 tab items in the tab bar. I don't want to add the ... anybody guide me in the right direction? See Question&Answers more detail:os...

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

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426 views

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ios simulator - iPhone: Failed to launch simulated application: Unknown error

This is a new iPhone project, only 1 target (different from this question) On build we get: ... Library/Application Support/iPhone Simulator See Question&Answers more detail:os...

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

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ios - What is the most efficient way to delete a large number (10.000+) objects in Core Data?

The way I'm trying to delete multiple sets of 10.000+ NSManagedObjects is just too memory intensive (around 20MB ... -efficient way to do 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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ios - SceneKit Culling Plane

I have a SCNScene rendering in a SCNView. I have some *.dae models that are rendered/moving in the ... youtu.be/MK3D91kCKzM Kind Regards Chris See Question&Answers more detail:os...

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

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344 views

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ios - Why do I get the wrong color of a pixel with following code?

I create an UIImage with backgroundcolor RED: let theimage:UIImage=imageWithColor(UIColor(red: 1, green: 0, blue: ... couldn't find the mistake. See Question&Answers more detail:os...

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

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400 views

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ios - iPhone 8, iPhone 8 Plus and iPhone X device code

I'm using the below code to get the device name NSString* code = [NSString stringWithCString:systemInfo.machine encoding ... Plus and iPhone X) See Question&Answers more detail:os...

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

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402 views

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ios - Running 1 of 2 custom shell script stuck for 2 minutes in Xcode

Running 1 of 2 custom shell scripts it stuck for 2 minutes while trying to build the app. I tried to ... end target 'MyProjectUITests' do end See Question&Answers more detail:os...

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

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344 views

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ios - [[CCDirector sharedDirector]winSize] is wrong

When I call CGSize winSize = [[CCDirector sharedDirector]winSize]; in cocos2d from the init method of the root view ... doesn't apply to me. See Question&Answers more detail:os...

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

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375 views

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ios - How to stop MPMoviePlayerViewController's automatic dismiss on moviePlaybackDidFinish?

An MPMoviePlayerViewController which is presented modally through presentMoviePlayerViewControllerAnimated: automatically dismisses itself ... . See Question&Answers more detail:os...

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

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291 views

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ios - Caching an Image and UICollectionView

I'm pretty new to Objective-C so hopefully this all makes sense. I've downloaded images from a server ... 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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428 views

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ios - Searching and filtering cells in a UICollectionView

I have a UICollectionView with a bunch of cells, and so there are two things I want accomplish with this view. First, ... 1.0]; return cell; } See Question&Answers more detail:os...

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

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387 views

1 answer

ios - Determine Number of Frames in a Core Audio AudioBuffer

I am trying to access the raw data for an audio file on the iPhone/iPad. I have the following code which ... this context would be great too! See Question&Answers more detail:os...

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

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767 views

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ios - Like objective-C , how to write "valueForKey" in swift?

NSDictionary dic; NSMutableArray array; //Objective-C Code. array = [dic valueForKey:@"Table"]; //"Table" is ... to write same code in Swift? See Question&Answers more detail:os...

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

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446 views

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ios - Swift - determine which button was pressed with switch

I have 4 buttons that call one function. Depending on which button was pressed i need to hide button inside of ... else { another case.. } See Question&Answers more detail:os...

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

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457 views

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ios - method not called with dispatch_async and repeating NSTimer

I am developing an app where i want to call method in separate queue using dispatch_async. I want to call that ... (@"calling method "); } See Question&Answers more detail:os...

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

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368 views

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ios - Best practice for storing temporary data in swift

I have developed an app that gets a lot of JSON data from server and shows on different VCs.What I did was ... data for showing in offline mode. See Question&Answers more detail:os...

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

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509 views

1 answer

ios - Getting this error command /usr/bin/codesign failed with exit code 1 with xcode 9.1?

I am getting this error /Users/macbook/Library/Developer/Xcode/DerivedData/xxxxx-egjyfcyhdfcgftavbtoudbcgthja/Build/Products/ ... still no luck. See Question&Answers more detail:os...

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

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719 views

1 answer

ios - How can I convert from UIImage to HEIF / HEIC Data in Swift?

Is NSKeyedArchiver appropriate to convert UIImage to Data? do { let data = try NSKeyedArchiver.archivedData(withRootObject: ... 's file system. See Question&Answers more detail:os...

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

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312 views

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ios - Add elements of two array with each other

I have 2 Array of type Int like this let arrayFirst = [1,2,7,9] let arraySecond = [4,5,17,20] ... the best practice to achieve this using swift3 See Question&Answers more detail:os...

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

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