Recent questions tagged iOS

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ios - Background GCM Push Notification Not Received on Certain Apple Devices

I have my iOS app set up to receive push notifications via GCM. Having set everything up, I am able to ... . Any thoughts would be appreciated. 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 - explanation for deinit not called

I have a view contoller (for log in) that defines deinit method to remove observers. When user taps on ... explains it succinctly and clearly. 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 - Ambiguous layout warnings for UILabels in UITableViewCell

I have two UILabel views next to each other in an UITableViewCell. The left one has one line, the right one can ... I have and what goes 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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ios - CGContextDrawPDFPage memory Leak - App Crash

When I analyze my app with Instruments, I found out that data allocated by CGContextDrawPDFPage is ... CGPDFDocumentRelease(drawPDFDocRef); } 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 - Unable to infer closure type in the current context

On the 3rd line in the function below I get the following error: Unable to infer closure type in the current context How ... () } } } }) } 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 - Invalid update: invalid number of rows in section 0 terminating with uncaught exception of type NSException

I've read all of the related posts regarding this and am still having an error: 'Invalid update: invalid ... [10199:90b] *** Assertion failure in -[UITableView _endCellAnimationsW...

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

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ios - how to set scrollview content size with auto layout?

I have one screen where I have added 1 scroll view on self view. Tab bar and navigation bar both are ... not working.Please help me. 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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ios - App architecture when 'state changing' APNS fails

I've seen several questions on this topic. But all simply say you just have to recover from other means. But ... to be addressed as a whole 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 - Datetime format from iPhone settings and GMT offset

I have string with date time format e.g.: 2013-05-28 10:56:31 How can I format this string to the iPhone ... e.g. GMT+1 Is this possible? 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 - Swift Firebase loading records with long delay

I'm building a Swift app using Firebase, and I'm new to both so be gentle. Currently, when I open ... with 33 individual children values each. 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 ARC conversion error [CFString retain] crash

I converted my huge IOS program to ARC using xcode auto conversion. After that I am getting the following error: [ ... return self; } 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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ios - UISwipeGesture 'unrecognized selector sent to instance'

If someone could please help me resolve this issue, would be great! I have spent a few hours trying ... view.addGestureRecognizer(upSwipe) } } 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 - Share via AirDrop only

I want to bring out the share sheet with the AirDrop as the only option in my ... UIActivityTypePostToVimeo, UIActivityTypePostToTencentWeibo]; 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 - Looping in Firebase

I have been trying to find a way to print/isolate each of the children in a part of the JSON data ... ? All help is greatly appreciated. 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 - Vertically center text in UILabel depending on actual visible letter height

How can I vertically center a single letter in a UILabel considering the actual visible size of the letter, ... achieved? 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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ios - A issue on Changing the Color of the Status Bar when switching apps on iPhone

I want to change the Status Bar color with the specific view controller. According to StackOverFlow's answers , i ... ? Many thanks in advances. 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 - Deploy and test application on device

How do I run my XCode project on my iPod touch? I am a developer, my iPod runs iOS 5.0.1, but I can not figure out how 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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ios - Action to Navigation bar back button

I want to show an alert with Confirmation when user clicks on back button. This is how I'm trying to add ... the action is not performed, too. 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 - is there any way to take a screenshot when MPMoviePlayerController is playing

I tried below steps to capture screenshot but got black backround for MPMoviePlayerController -(UIImage*)screenshot { ... ; return 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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ios - Determine which of its animationImages a UIImageView is displaying?

Is there a way to find out which frame of its animation a UIImage is on? When you start it you give it ... frame to start its animation 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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ios - Detect if drawing a path is a circle/rectangle in xcode

I want to implement a auto complete feature for a drawing app. Once a free hand object is drawn, I want ... about to detecting the shape type? 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 - RealmSwift display for each date to tableview section

I'm new in swift and realm. I want to display data which are stored in realm. I want to display for each date ... 01-28 400 45 2018-01-30 258665 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 - NSJSONSerialization and Emoji

I'm currently trying to POST some JSON containing emojis to a python API. I tried feeding the NSJSONSerialization ... how to fix 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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ios - Apple Testfiight App Submission Can't Click Next

I submitted my TestFlight build, and not I'm trying to select it for external testing. I've done this ... Anyone else ever experience 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 - Where can I get CommonCrypto / CommonCrypto file from?

I have a problem with importing CommonCrypto/CommonCrypto or CommonCrypto/CommonDigest. I need a SHA256 for my ... CommonCrypto for SHA256? 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 - Firebase Invalid registration token. Check the token format

This questions has been asked and answered many times before, yet I can't figure out what I am doing wrong. ... } } }//end of AppDelegate 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 - What's the equivalent of the UISplitViewController in SwiftUI

I need to implement an UI which close to the default Mail app in iPad and iPhone. The App has two sections, ... implement it in the new SwiftUI 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 group array of dates by months in swift?

I am working on a scheduling app. I want all the dates of the given months I am not able to group dates ... } var sections = [ScheduleDates]() See Question&Answers more detail:os...

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

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