Recent questions tagged ios

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ios - Behavior differences between performBlock: and performBlockAndWait:?

I'm creating an NSManagedObjectContext in a private queue to handle data updates I take from files and/or ... managed? Thanks in advance 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 - Is Objective-C's NSMutableArray thread-safe?

I've been trying to fix this crash for almost a week. The application crashes without any exception or ... not being thread-safe? 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 - Is it necessary to use [unowned self] in closures of UIView.animateWithDuration(...)?

UIView.animateWithDuration(1, animations: { [unowned self] in self.box.center = self.boxTopRightPosition }, completion ... to avoid memory leak? 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 - UICollectionView Horizontal Paging not centered

I have a horizontal scrolling collectionView with each cell the size of the view. When I page through the ... watch?v=tXsxWelk16w Any ideas? 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 make both header and footer in collection view with swift

How to make both header and footer in collection view in swift ? I'm trying to combine a header and a footer ... } I hope someone will 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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ios - Left-align image and center text on UIButton

I've seen posts regarding right alignment but I can't get left-alignment to work. I want the button to take up the ... .width - 10.0, 40.0); 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 - Bordered UITextView

I want to have a thin gray border around a UITextView. I have gone through the Apple documentation but couldn' ... property there. 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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357 views

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ios - Error Appstore connect : Missing Purpose String in Info.plist File

I've submitted my app for review to the App Store Connect. Although the app is still under review, I've received ... the Info.plist. Any idea? 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 manipulate texture content on the fly?

I have an iPad app I am working on and one possible feature that we are contemplating is to allow the user ... periodically to get this effect. 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 animate Tab bar tab switch with a CrossDissolve slide transition?

I'm trying to create a transition effect on a UITabBarController somewhat similar to the Facebook app ... /Interactive-Studio/TransitionableTab See Question&Answers more detail:os...

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

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413 views

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ios - Error Itms-90339: This bundle is invalid . The info.plist contains an invalid key 'CFBundleResourceSpecification’ in app bundle

I am trying to upload my application on iTunes for iOS 9. I used Xcode 7 beta 6 to build my IPA , but ... my IPA by following error message . 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 4.2 jumps to main.m every time after stopping simulator

This is more of a general annoyance. Every time after stopping the simulator, Xcode jumps to main.m for some ... in previous versions of XCode. See Question&Answers more detail:os...

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

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321 views

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ios - How to correctly subclass UIControl?

I don't want UIButton or anything like that. I want to subclass UIControl directly and make my own, ... Fast and undelayed Touch coordinates. See Question&Answers more detail:os...

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

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127 views

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ios - How to set image in circle in swift

How can i make i circle picture with swift ? My ViewController : import UIKit import Foundation class ... programming-circular-image-calayer/ See Question&Answers more detail:os...

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

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279 views

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ios - UIPopovercontroller dealloc reached while popover is still visible

I assure you that I did look for an answer in SO for my question but none of them were ... UIPopoverControllers when benefitting from ARC? See Question&Answers more detail:os...

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

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180 views

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ios - How do I vertically center UITextField Text?

I am simply instantiating a UITextField and noticing that the text doesn't center vertically. Instead, it is flush ... that I am missing? See Question&Answers more detail:os...

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

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554 views

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ios - The identity used to sign the executable is no longer valid

I have an application that I am debugging on iPad. 2 days ago I wanted to debug a same updated application ... I have debugged this game once. See Question&Answers more detail:os...

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

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496 views

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ios - UIButton title text color

I'm setting text color for UIButton headingButton.titleLabel.textColor = [UIColor colorWithRed:36/255.0 green:71/255. ... code it's working. See Question&Answers more detail:os...

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

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611 views

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ios - Add segmented control to navigation bar and keep title with buttons

I want to add segmented control to the navigation bar but also keep the title and buttons, like in iOS 7 ... same level as segmented control. See Question&Answers more detail:os...

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

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260 views

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ios - Stretch background image for UIButton

I got texture, which really shorter, than my UIButton. I got this texture: And i should create this ... Stretching in horizontal direction Thnx See Question&Answers more detail:os...

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

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153 views

1 answer

ios - Where and how to __bridge

I need some advice on __bridge-ing in iOS. Hopefully the SSCCE1 below will explain the problem better than I can ... pathPoints); } } 1: SSCCE See Question&Answers more detail:os...

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

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158 views

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ios - WKWebView evaluate JavaScript return value

I need to change a function to evaluate JavaScript from UIWebView to WKWebView. I need to return result of ... Can you suggest a solution? See Question&Answers more detail:os...

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

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208 views

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ios - AVCaptureVideoPreviewLayer orientation - need landscape

My app is landscape only. I'm presenting the AVCaptureVideoPreviewLayer like this: self.previewLayer = [[ ... be orientated correctly. See Question&Answers more detail:os...

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

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331 views

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ios - Using Tint color on UIImageView

I have my own subclass of UIButton. I add UIImageView on it and add an image. I would like to paint it over ... the same as it was originally.) See Question&Answers more detail:os...

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

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475 views

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ios - How can I change UIButton title color?

I create a button programmatically.......... button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button ... I change title color? See Question&Answers more detail:os...

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

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321 views

1 answer

ios - Swift - how to get last taken 3 photos from photo library?

I need to get and show last taken 3 photos from photo library on viewDidload event without any clicks. After ... do this with swift? 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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169 views

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ios - Iphone, Obtaining a List of countries in an NSArray

I have a menu that let's a user select a country. Exactly like that in the contacts.app country menu within the ... 'GB' I want Great Britain. See Question&Answers more detail:os...

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

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198 views

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ios - How to calculate the age based on NSDate

how to calculate the age based on the birth date in this format 6/24/1976 mon/date/year... See Question&Answers more detail:os...

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

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