Recent questions tagged iOS

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ios - What is a 'UIView-Encapsulated-Layout-Width' constraint?

I keep getting 'Unable to simultaneously satisfy constraints' exceptions (Xcode 5, iOS 7, both device and simulator) ... to do with 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 - Any way to get the response body during HTTP errors?

I'm hitting an API that will occasionally throw a HTTP 403 error, and the response body can give some extra ... or something I'm missing here? 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 - XCode 6.3 adding margins to tableviewcell

Did XCode 6.3 / Swift 1.2 add additional margins to a UITableViewCell's contentView? Prior to updating, I ... directly after updating. Edit: 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 migrate Alamofire router class to Swift 3?

Does anybody know how to change this entire approach to Swift 3? At this moment I have something very ... return mutableURLRequest } } } 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 - UIScrollView animation of height and contentOffset "jumps" content from bottom

Trying to do something similar to the Messages.app's behavior, I have a UIScrollView and beneath it a text ... is available 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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413 views

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ios - iOS5 -webkit-overflow-scrolling causes touch events to stop working

when using [-webkit-overflow-scrolling: touch;], the scrolling area does work well, but it causes touch ... know what causes this 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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ios - Proper usage of RxSwift to chain requests, flatMap or something else?

First of all, I'm new to rxswift so I guess the answer is obvious however at the moment I can't find ... ) return Disposables.create() } } 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 - Objective C : How to create self.view inside Safe Area programmatically

I have just changed my app from supporting iOS 8 and up to supporting iOS 9 and up. Since I don't use ... & bottom in the iPhone X 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 - Cordova app failing to Archive with Xcode 7.1 (Cordova/CDVViewController.h file not found)

I've recently updated my Xcode to version 7.1 (from 7.0.1) and my Cordova app is failing to ... helps anyone encountering the same 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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ios - Xcode 4.6 zXing compile error after Xcode update (4H127)

Different projects using ZXing have error after last Xcode update: Error messages are: private field 'cached_y_' is not ... I have to set up? See Question&Answers more detail:os...

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

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365 views

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ios - Is it possible to push a View Controller with a completion block?

UINavigationController's documentation contains no pushViewController methods with a completion: parameter. 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 select a portion of an image, crop, and save it using Swift?

I am trying to create an iOS app using Swift to capture images and let the user save a selected portion of the ... only that piece of the image? See Question&Answers more detail:os...

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

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373 views

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ios - UIScrollView not scrolling in iOS7 with autolayout on

I have a UIScrollView with a 6 textfields in it and a button inside of it. There ... <UITextFieldDelegate, UIScrollViewDelegate> See Question&Answers more detail:os...

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

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412 views

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ios - UIPopover How do I make a popover with buttons like this?

I'm wondering how I can create a popover with buttons like this. ANSWER: UIActionSheet * actionSheet = [[UIActionSheet ... existing photo... } } See Question&Answers more detail:os...

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

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252 views

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ios - Separating Data Source to another class in Swift

I'm trying to keep my view controllers clean as described in this article objc.io Issue #1 Lighter View Controllers. ... help me out? 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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342 views

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ios - Subview frame is incorrect when creating UICollectionViewCell

The problem I created a UICollectionViewController with a custom UICollectionViewCell. The custom cell contains a large and ... iOS SDK 8.1. See Question&Answers more detail:os...

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

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335 views

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ios - Assertion failure in UITableView configureCellForDisplay:forIndexPath:

I'm not sure where the error is here, having looked at other similar issues. I received an Assertion failure. ... :currentValue]; 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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351 views

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ios - Implementing Receipt Validation in Swift 3

I am developing an iOS app in Swift 3 and trying to implement receipt validation following this tutorial: http: ... request httpBody in Swift 3. See Question&Answers more detail:os...

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

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849 views

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ios - Add a circular cropping component for UIImagePicker?

I Have a circular framed UIImageView and I need to add a circular framed cropping tool for the UIImagePickerController, ... : true) }) } 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

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ios - iPhone MKMapView: set map region to show all pins on map

I'm trying to set the map region (center and span) so that the map shows all pin-annotations at the same ... '43.5686473'. Any hints? Cheerz See Question&Answers more detail:os...

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

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334 views

1 answer

ios - How to fix "Capturing 'block' strongly in this block is likely to lead to a retain cycle"

I am working on this code, which does some lengthy asyncronous operation on the net and when it finishes it ... I fix this? Thanks Nicola See Question&Answers more detail:os...

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

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416 views

1 answer

ios - How to support multiple devices with non-renewing In-App Purchase?

I'm building an iOS app that will include an IAP with a non-renewing subscription. Apple provides this nugget ... elegant that others have done. See Question&Answers more detail:os...

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

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421 views

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ios - UITableViewController inside a UIViewController

I'm new to iOS and objective-C and I'm having some trouble in understanding how controllers work. In my code I ... is the right 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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297 views

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ios - How should private and public members be implemented in objective-c?

I had some discussion related to the use of properties and instance variables at work, therefore I would like ... theory that clears 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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484 views

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ios - How to Ping or check if server of particular IP Address is available/connected in iPhone

I want to Ping or Lookup a particular IP address of server if it is connected or available at that particular ... this field. 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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467 views

1 answer

ios - How to test In App Purchases through Apple TestFlight?

I uploaded my first app to iTunes Connect (iOS 8, iPhone) and it's now available through Apple TestFlight for ... to view your contract status. See Question&Answers more detail:os...

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

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355 views

1 answer

ios - Update NSFetchedResultsController using performBackgroundTask

I have an NSFetchedResultsController and I am trying to update my data on a background context. For example, ... everything works as expected. 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

1 answer

ios - Generic controller in swift 2.0 using storyboards

Im trying to create a GenericListController for my app. I have a ProductListController that extend this generic ... cant detect the class) See Question&Answers more detail:os...

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

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