Recent questions tagged iOS

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ios - Swift - "use of unresolved identifier"

I am studying Swift! I want create Main interface on xib. But have error "use of unresolved identifier". Add code from ... . } } UPD:(Add 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 - Change Label of UISwitch

I have to change the label of a UISwitch from ON-OFF to YES-NO. I want this method to be implemented in ... the cook book, but without success 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 - are extensions bad for performance in swift?

Swift offers the ability to write extensions. I do that a lot to make my code easier to read. Not ... , because of performance reasons? 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 - Codesign returned errSecInternalComponent in High Sierra

I tried to codesign using: /usr/bin/codesign -f -s $IDENTITY --keychain $KEYCHAIN --entitlements ... get an errSecInternalComponent error. 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 - Hiding Cancel button on search bar in UISearchController

I'm trying to hide the Cancel button of the search bar in the UISearchController, but unfortunately setting the ... not ideal. Any suggestions? See Question&Answers more detail:os...

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

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221 views

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ios - Access iPhone's built-in ringtones

I have a task to access the system ringtones in my iPhone application. I want to know if it is possible to ... not, please explain the reason. See Question&Answers more detail:os...

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

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397 views

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ios - XCode no valid compiled storyboard at path

I've got a universal XCode Project (ObjC) for iPad and iPhone with a subproject that contains a storyboard. ... the iPad find the storyboard? 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 expose existing property on Obj-C class using an extension protocol in Swift

In Swift 1.1 we were able to have code like below compile and work where we exposed existing Objective-C ... property with a different name? 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 - iAd Banner is not working

I'm trying to get a banner in my app, but since I added the banner, the app won't start. I get an error ... } } What do you think 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 - Xcode 6.3 New File Issue

I recently updated my Xcode to 6.3 stable version. When I try to add a new folder (Right Click ... s causing this problem? Thanks. See Question&Answers more detail:os...

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

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212 views

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ios - How to use MKPolylineView in Swift

I want to draw polyline in my Swift app. Swift code class MapViewController: UIViewController, MKMapViewDelegate { ... a solution to 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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342 views

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ios - GCM registration is not ready with auth credentials in ios9

Hi i am using GCM for push notification, it is working fine in iOS8 but in iOS9 it is giving error "GCM ... (com.google.gcm error 501.) 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 - The model used to open the store is incompatible with the one used to create the store

I created a Core Data model in xcode 3.2 and after upgrading in Xcode 4.2, I then added a new entity ... solution for this issue? Please 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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245 views

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ios - Changes to SwiftUI FetchRequest not triggering view refresh?

Using the FetchRequest wrapper, and changing the data of the fetched results inside the view. This works the first ... , results are the same. See Question&Answers more detail:os...

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

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293 views

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ios - Can I launch an app in Foreground when I enter an iBeacon range?

I'm creating an app for iOS using iBeacons. I know, that if i set up a region to monitor, the framework can ... if it was launched by the user? See Question&Answers more detail:os...

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

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446 views

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ios - 'downloadURL()' is deprecated: Use `StorageReference.downloadURLWithCompletion()` to obtain a current download URL.?

Storage.storage().reference().child(ImageUid).putData(ImageData, metadata: metadata) { (metadata, error) in if error != ... . How do I fix 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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244 views

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ios - CGColorGetComponents() not returning the correct values for black and for white

Has anyone experienced this problem? It looks like a bug in Apple's code and I will submit a radar if people ... components: (components)") } } See Question&Answers more detail:os...

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

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790 views

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ios - "Invalid predicate: nil RHS" for second argument in NSPredicate format

This is my NSPredicate: print(searchTextField.text!) let predicate = NSPredicate(format: "student.schoolClass.id = %d ... RHS Isn't it weird? 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 - FairPlay Streaming: Calling copyPixelBufferForItemTime on AVPlayerItemVideoOutput returns NULL

Has anybody had experience using HLS with Fairplay and succeeded in retrieving the pixel buffer? I'm using an ... using FairPlay on iOS? See Question&Answers more detail:os...

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

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215 views

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ios - Error setting text in collection view cell

when I nslog the value after setting it it is NULL, any word why? CustomCollectionVIewCell *cell =[[ ... setObject:cell atIndexedSubscript:i]; See Question&Answers more detail:os...

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

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384 views

1 answer

ios - Seed and maintain CloudKit public database without requiring iCloud login?

The Apple docs say reads from an app's CloudKit public database can occur without an iCloud login, but writes ... , Swift is preferred. Thanks. See Question&Answers more detail:os...

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

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280 views

1 answer

ios - Retrieving Data using Firebase Swift

I'm using Firebase for my Swift iOS application. I found the retrieving data tutorial on Firebase's guide a ... Any help would be 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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376 views

1 answer

ios - Supporting Multiple Screen Sizes in Storyboards (3.5 and 4 inch screens)

I am trying to create a tic tac toe app that will work on both the 3.5 and 4 inch iPhones. However, I ... size? Thanks to anyone who responds. See Question&Answers more detail:os...

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

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159 views

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ios - Parse Query in WatchKit

I do a Parse query in my iPhone app, but I am getting errors trying to do the same Parse query in my Watch app. ... { // What to put 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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265 views

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ios - Dynamic CollectionViewCell In TableViewCell Swift

Question: How To Make UITableViewCell Height Dynamic according the UICollectionViewCell? View Hierarchy: ... the UICollectionViewCell. 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

1 answer

ios - Obtaining weights in CvSVM, the SVM implementation of OpenCV

I am using the SVM implementation of OpenCV (based on LibSVM) on iOS. Is it possible to obtain the weight vector after training? 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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365 views

1 answer

ios - addArc(withCenter) closing path

The following code: let size = CGSize(width: 200, height: 30) let rect = CGRect(origin: .zero, size: size) let ... be closed, how can I do that? See Question&Answers more detail:os...

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

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270 views

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ios - Cells order in UICollectionView

I need to create a UICollectionView with cells of different sizes (1x1, 2x2, 2x1, 3x2.5). I've already code to ... doesn't work like that ... See Question&Answers more detail:os...

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

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