Recent questions tagged IOS

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ios - Combine: how to replace/catch an error without completing the original publisher?

Given the following code: enum MyError: Error { case someError } myButton.publisher(for: .touchUpInside).tryMap( ... by the original publisher? See Question&Answers more detail:os...

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

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465 views

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ios - Confirm back button on UINavigationController

I am using the storyboard for my app which is using UINavigationController. I would like to add a ... the UINavigationController. Any ideas? See Question&Answers more detail:os...

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

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634 views

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ios - Swift 4 async call with for loop execute in order using DispatchGroup, DispatchQueue and DispatchSemaphore

I want to run a for loop in swift in order, DispatchGroup will fire them together, so I want to use ... productCollectionView.reloadData() } } } See Question&Answers more detail:os...

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

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477 views

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ios - Keeping the order of NSDictionary keys when converted to NSData with [NSJSONSerialization dataWithJSONObject:]

I have the following situation: NSDictionary *params = @{ @"Checkout" : @{ @"conditions" : @{@"Checkout.user_id" : ... guys, how can i do that?? See Question&Answers more detail:os...

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

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190 views

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ios - Multiple UITableview in Single Viewcontroller

I have a viewcontroller in that i want to show 3 tableviews(because the content and the table properties are different). ... ,320,200); }]; } See Question&Answers more detail:os...

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

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363 views

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ios - NSURLCache and ETags

Does NSURLCache transparently handle ETags received by server? I mean: does it automatically store ETags for each URL ... manage it by myself? 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 - AVPlayer with playback controls of avplayerviewcontroller

I am putting n avplayer inside of a view controller to customize some other elements of the view ... am not using AvPlayerViewcontroller? See Question&Answers more detail:os...

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

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493 views

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ios - SwiftUI tappable subtext

Is there any way in SwiftUI to open browser, when tapping on some part of the text. I tried the above ... why using HStack will not work See Question&Answers more detail:os...

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

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491 views

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ios - Will apps that use telprompt be rejected

In order to return to app after call, I use telprompt instead of tel. Codes like this: [[UIApplication ... No. Can anybody help 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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318 views

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ios - how to get selected text from uitextfield in iphone?

I am working on Text to speech application in iPhone, in which have a text field that takes input, i want ... user has selected from text field? See Question&Answers more detail:os...

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

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529 views

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ios - Swift base64 decoding returns nil

I am trying to decode a base64 string to an image in Swift using the following code: let decodedData=NSData( ... the reason behind my issue? See Question&Answers more detail:os...

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

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587 views

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ios - Unrecognized selector sent to instance while archiving data (NSCoding)

-(void)transformObjects:(NSMutableArray*)array key:(NSString*)key { NSMutableArray* archiveArray = [[NSMutableArray ... archive an object. See Question&Answers more detail:os...

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

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401 views

1 answer

ios - How to change space between cells in UICollectionView?

I want to reduce the size between cells in row. Now it looks like: I'm trying this, for reduce the size between ... t help me. What I do 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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209 views

1 answer

ios - Reference to 'X' is ambiguous

After several changes to my project I suddenly get this build error: Reference to 'kCGImageAlphaPremultipliedLast' is ... to a working commit. See Question&Answers more detail:os...

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

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391 views

1 answer

ios - Code Sign error: Certificate identity 'iPhone Developer: My Name (xxx)' appears more than once in the keychain

I m stuck with this error: Code Sign error: Certificate identity 'iPhone Developer: My Name (xxx)' appears more than ... can't be found ... See Question&Answers more detail:os...

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

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527 views

1 answer

ios - Subclass of class with synthesized readonly property cannot access instance variable in Objective-C

In the superclass MyClass: @interface MyClass : NSObject @property (nonatomic, strong, readonly) NSString *pString; @end ... What am I missing? See Question&Answers more detail:os...

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

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303 views

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ios - can I set accessibility identifier in interface builder? Xcode4.2

I can only set Accessibility Label in interface builder, but in UI Automation,I need Accessibility Identifier to get the ... any 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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454 views

1 answer

ios - How to clear all cached images loaded from SDWebImage?

I have all images loaded on my app via SDWebImage. The downloading and caching works great, but I wanted to make ... ? Using Swift. 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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317 views

1 answer

ios - How do I draw on an image in Swift?

I need to be able to programmatically draw on an image, and save that image for later use. Say, draw a ... converting it back to a UIImage. See Question&Answers more detail:os...

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

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310 views

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ios - Header Displaced in TableView with UIRefreshControl

My UIRefreshController is doing something odd. When I pull-down refresh, the tableView headers are displaced. If I pull- ... one? Thanks a ton! See Question&Answers more detail:os...

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

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481 views

1 answer

ios - How to align text inside textView vertically?

I want to align vertically the text inside my UITextView (so it will be in the middle of it). How can i ... could help me. 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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440 views

1 answer

ios - How can I set the cornerRadius of a UIStackView?

I'm updating my app to use UIStackViews, now that most people should have updated to iOS 9. In the ... have any helpful/relevant information. See Question&Answers more detail:os...

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

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264 views

1 answer

ios - Use logical operator as combine closure in reduce

I am trying to reduce an array of Bools by applying the logical operator OR (||) using the following code, ... without using the hack above? See Question&Answers more detail:os...

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

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385 views

1 answer

ios - Is IBOutletCollection guaranteed to be of correct order?

I have two contradicting sources in regards to IBOutletCollection with NSArray. First says that the order that you ... source. Who is right? 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

1 answer

ios - Can't set background color of UITableViewCell in IB

I have created a bunch of cells which I reuse in a table view. All of those cells just have different ... handled within a table view cell. See Question&Answers more detail:os...

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

0 votes

463 views

1 answer

ios - latitude and longitude points from MKPolyline

I am trying to figure out a way to get all the latitude and longitude points from a MKPolyline drawn on a MKMapView on ... to a lat and long... See Question&Answers more detail:os...

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

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294 views

1 answer

ios - Xcode 7 UI Testing: Dismiss Push and Location alerts

I encountered a problem with Xcode 7 UI Testing. The app displays two alerts after my user logs in, the ... those two successive alerts views? See Question&Answers more detail:os...

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

0 votes

478 views

1 answer

ios - How to disable ARC for a single file in Xcode 5?

I recently downloaded Xcode 5, and it's now my primary IDE. However, I now need to disable Automatic Reference Counting ... , how do I 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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