Recent questions tagged IOS

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ios - backgroundTimeRemaining returns (35791394 mins)?

I'm using beginBackgroundTaskWithExpirationHandler in my application. my understanding the max time given for background ... something wrong?! See Question&Answers more detail:os...

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

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278 views

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ios - How to Play multiple audio files simultaneously

how to Play numbers Of audio files at same time With AVAudioPlayer? Is it Possible to Play numbers Of audio files ... at same time ? 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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354 views

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ios - Increment tab bar badge w/ UIAlertAction swift?

@IBAction func addToCart(sender: AnyObject) { let itemObjectTitle = itemObject.valueForKey("itemDescription") as! String let ... stays at 1. See Question&Answers more detail:os...

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

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371 views

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ios - How To Set NavigationView Background Colour in SwiftUI

I'm trying to set the background color of a NavigationView. I'm trying by adding a ZStack using the code ... the whole background to show blue See Question&Answers more detail:os...

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

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209 views

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ios - Why does it take such a long time for UI to be updated from background thread?

I understand that all UI updates must be done from Main thread. But purely for the sake of deeper understanding ... { super.viewDidLoad() } } See Question&Answers more detail:os...

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

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393 views

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ios - Drag UIButton without it shifting to center [Swift 3]

So I found out how to make a button draggable using the UIPanGestureRecognizer. But the only way I know how to do ... is } } 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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406 views

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ios - Play/Forward video in 2x 3x 4x speed - iPhone SDK

I want to play/forward video in MPMoviePlayerController with different speeds. Can any one suggest me how i do ... normal speed. Please suggest. See Question&Answers more detail:os...

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

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272 views

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ios - Unable to switch to speaker output when bluetooth headsets are connected

I'm trying to allow for a toggle between bluetooth headsets (airpods in my case) and the phone speaker, using ... 'm doing wrong here?? Thanks See Question&Answers more detail:os...

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

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407 views

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ios - How to decode / convert a base64 string to NSData?

Hello I am trying to figure out how convert / decode a base64 string in an iOS application to NSData, so I ... the base 64 string to NSData? See Question&Answers more detail:os...

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

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396 views

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ios - UILongPressGestureRecognizer on UITableViewCell - double call

I'm using the UILongPressGestureRecognizer in a cell. What I need is: when a user taps a cell for 1.0 seconds, ... can I do that? Thanks, RL See Question&Answers more detail:os...

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

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490 views

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ios - Firebase Storage Warning: downloadURL()' is deprecated: Use `StorageReference.downloadURLWithCompletion()

I just updated my project to the latest version of Firebase Storage and I am now getting a warning: downloadURL() is ... } else { return } } See Question&Answers more detail:os...

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

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290 views

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ios - Recording from RemoteIO: resulting .caf is pitch shifted slower + distorted

So I've cobbled together some routines for recording audio based on some posts here. The posts I've referenced are ... ); } return noErr; } See Question&Answers more detail:os...

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

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254 views

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ios - What is the expected behaviour of Facebook login?

I want to know what the expected behaviour of Facebook login integrated in an iPhone app is, when a user is ... //bit.ly/1E1u2VI 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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275 views

1 answer

ios - What is the best way to record a video with augmented reality

What is the best way to record a video with augmented reality? (adding text, images logo to frames from ... Is there any better 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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407 views

1 answer

ios - private vs. fileprivate on declaring global variables/consts in Swift3?

Should I use private or fileprivate to declare global variables/consts in Swift 3? e.g. fileprivate let a = 1 ... { fileprivate b = 0 } See Question&Answers more detail:os...

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

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343 views

1 answer

ios - Scaling Physics Bodies in Xcode Spritekit

I recently came across an issue where I would increase the size of a node, but the physics body would ... withKey: @"expanderMoving"]; See Question&Answers more detail:os...

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

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606 views

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ios - Unrecognized selector sent to instance Swift 3

I want to implement TapGestureRecognizer with the selector, below is the code where I added tapGestureRecognizer ... to instance 0x6080001a7700' See Question&Answers more detail:os...

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

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323 views

1 answer

ios - URLSessionDelegate Function Not Being Called

I would like to process data as it comes in, so I've instiated a URL session like so: let session = ... method is still not being called. See Question&Answers more detail:os...

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

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224 views

1 answer

ios - Get each line of text in a UILabel

I'm trying to add each line in a UILabel to an array, but the code I'm using doesn't appear to be terribly ... going today?"]. What's going on? See Question&Answers more detail:os...

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

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424 views

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ios - AVAssetResourceLoaderDelegate methods not working on device

I have been working on a simple AVPlayer to play encrypted HLS media. I am using the AVAssetResourceLoaderDelegate ... thoughts on the 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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1.0k views

1 answer

ios - Draw polyline using Google Maps in custom view with Swift 3

I am trying to draw route between two places using Google Maps on a custom UIView but not able to get it ... map = mapViewX } Please help! 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

1 answer

ios - How to detect fullscreen mode using AVPlayerViewController in Swift?

I am trying to detect when the AVPlayerViewController is in full-screen mode, but I'm having a difficult time ... or full screen mode. Thanks! See Question&Answers more detail:os...

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

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257 views

1 answer

ios - Why don't my views show up in Storyboards and are greyed out in the left pane?

I am experiencing a weird bug in Storyboards. I set up a UITableViewController with prototype cells and set some ... in the storyboard 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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270 views

1 answer

ios - Optional binding with try? and as? still produces an optional type

I have code for executing an NSFetchRequest and casting its result to an array of my custom data model type. ... the array is still optional. See Question&Answers more detail:os...

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

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442 views

1 answer

ios - Apple rejected app 10.6 because Facebook opens Safari to login

I sent another version of my app, that allow users to login via Facebook. Of course, I use official Facebook ... to open login page inside app? See Question&Answers more detail:os...

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

0 votes

367 views

1 answer

ios - UICollectionViewCell dynamic height w/two dynamic labels & auto layout

I have a UICollectionViewCell subclass that's setup with a prototype cell and constraints (every view is connected ... to any real success. See Question&Answers more detail:os...

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

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192 views

1 answer

ios - Cannot assign class instance to its protocol type?

Please see self containing example below. Compiler reports an error on the last line (marked by COMPILE ERROR ... specialize a generic function See Question&Answers more detail:os...

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

0 votes

291 views

1 answer

ios - uitableview: nested section headers

Im trying to implement a uitableview with the following structure: section group 0 section 0 cell 0 cell 1 cell ... this already? Thanks :) See Question&Answers more detail:os...

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

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