Recent questions tagged iOS

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ios - Detected a case where constraints ambiguously suggest a height of zero

After updating to Xcode 6.1 beta 2 when I run my app that contains tableview cells, the debug assistant says: ... tableView cells aren't there. 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 can I change the image displayed in a UIImageView programmatically?

I have an IBOutlet to a UIImageView, but when I look at the UIImageView doc, I can't see any hints ... an UIImage object from that UIImageView? 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 - Get UIScrollView to scroll to the top

How do I make a UIScrollView scroll to the top? 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 - CABasicAnimation does not animate correctly when I update model layer

I'm currently implementing a CABasicAnimation that animates a CALayer transform property. Now, although I'm new ... different results? 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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ios - How to delete an app from iTunesConnect / App Store Connect

I submitted a brand new app to AppStore and it got rejected by the Lords ... (nothing new there). What I ... in-app purchases or game center. See Question&Answers more detail:os...

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

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203 views

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ios - iPhone: Can a dev other than team agent build an app for distribution

I have a company iphone dev account. According to the doc, only the team-agent is allowed to submit a distribution ... of an app. 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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277 views

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ios - Converting a Vision VNTextObservation to a String

I'm looking through the Apple's Vision API documentation and I see a couple of classes that relate to text ... Vision. Thank you for reading. 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 - Sizing a Container View with a controller of dynamic size inside a scrollview

I'm trying to create a container view, with a controller that has a dynamic height, inside a UIScrollView ... setting a height constraint? 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 - Using tesseract to recognize license plates

I'm developing an app which can recognize license plates (ANPR). The first step is to extract the licenses ... I can improve with tesseract? 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 - What is NSManagedObjectContext's performBlock: used for?

In iOS 5, NSManagedObjectContext has a couple of new methods, performBlock: and performBlockAndWait:. What are these ... it would be great. See Question&Answers more detail:os...

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

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258 views

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ios - the paper folding/unfolding effect in twitter for iPad

Twitter for iPad implements a fancy "pinch to expand paper fold" effect. A short video clip here. http:// ... bounty on this question - srikar See Question&Answers more detail:os...

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

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539 views

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ios - Disable the interactive dismissal of presented view controller

iOS 13 introduces a new design of modalPresentationStyle .pageSheet (and its sibling .formSheet) for modally presented ... style 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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300 views

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ios - UICollectionView performance - _updateVisibleCellsNow

I'm working on a custom UICollectionViewLayout that displays cells organized by day/week/month. It is not scrolling ... jitter. Am I 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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244 views

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ios - Where should I be setting autolayout constraints when creating views programmatically

I see different examples where constraints are set. Some set them in viewDidLoad / loadView (after the subview ... :self.view.constraints]? See Question&Answers more detail:os...

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

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576 views

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ios - Snap to center of a cell when scrolling UICollectionView horizontally

I know some people have asked this question before but they were all about UITableViews or UIScrollViews and I ... answering this. 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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171 views

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ios - Proper usage of the Alamofire's URLRequestConvertible

I've read couple tutorials, README from @mattt but can't figure out couple things. What is the proper usage of ... the right way to do it? See Question&Answers more detail:os...

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

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259 views

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ios - Alamofire : How to handle errors globally

My question is quite similar to this one, but for Alamofire : AFNetworking: Handle error globally and repeat ... subclass to handle 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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412 views

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ios - How to draw a smooth circle with CAShapeLayer and UIBezierPath?

I am attempting to draw a stroked circle by using a CAShapeLayer and setting a circular path on it. However, ... different (and worse) fashion. See Question&Answers more detail:os...

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

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458 views

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ios - Autolayout - intrinsic size of UIButton does not include title insets

If I have a UIButton arranged using autolayout, its size adjusts nicely to fit its content. If I set an image ... the image and the text. See Question&Answers more detail:os...

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

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226 views

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ios - UIScrollView image/photo viewer with paging enabled and zooming

OK, I think it's time to make an official place on the internet for this problem: How to make a UIScrollView ... bounce + pan + paging code. See Question&Answers more detail:os...

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

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285 views

1 answer

ios - How can I write an iPhone app entirely in JavaScript without making it just a web app?

I don't want to take the time to learn Obj-C. I've spent 7+ years doing web application programming. ... from the resources of the project? See Question&Answers more detail:os...

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

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282 views

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ios - How to round the corners of a button

I have a rectangle image (jpg) and want to use it to fill the background of a button with rounded corner in ... to represent my button? 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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686 views

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ios - iPad Multitasking support requires these orientations

I'm trying to submit my universal iOS 9 apps to Apple (built with Xcode 7 GM) but I receive this error ... have to have all four orientations? See Question&Answers more detail:os...

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

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311 views

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ios - How to control shadow spread and blur?

I have designed UI elements in sketch, and one of them has a shadow with blur 1 and spread 0. I looked at ... .9 view.layer.shadowRadius = 5 } See Question&Answers more detail:os...

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

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769 views

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ios - Missing Compliance in Status when I add built for internal testing in Test Flight.How to solve?

When I added my latest build for internal testing with TestFlight, I saw that it had a "Missing Compliance" ... can I resolve this issue? See Question&Answers more detail:os...

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

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177 views

1 answer

ios - How to use Git properly with Xcode?

I have been an iphone developer for a while, and I have recently been including git in my workflow. I have ... files are added to the project? See Question&Answers more detail:os...

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

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268 views

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ios - Swift : non-nil optional value raising a nil exception

I'm having a dictionary, with values, i'm calling it to populate a field if let userdata: NSDictionary = self. ... see what i'm doing wrong 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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291 views

1 answer

ios - Why I couldn't assign fetched values from Firestore to an array in Swift?

I tried several times with various ways to assign the collected values of documents from firestore into an array. ... print(self.hotelCities) } See Question&Answers more detail:os...

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

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