Recent questions tagged IOS

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ios - What is a provisioning profile used for when developing iPhone applications?

What is the purpose of a provisioning profile and why is it needed when developing an iPhone application? ... profile, what happens? See Question&Answers more detail:os...

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

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199 views

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ios - Delete specified file from document directory

I want to delete an image from my app document directory. Code I have written to delete image is: -(void) ... code to do the same? 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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284 views

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ios - Access files in /var/mobile/Containers/Data/Application without jailbreaking iPhone

A program logs some message in directory /var/mobile/Containers/Data/Application on iPhone. Is there any way ... my logs without jailbreaking? 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 - AVPlayer stops playing and doesn't resume again

In my application I have to play audio files stored on a web server. I'm using AVPlayer for it. I have ... the play button again? 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 do I get hour and minutes from NSDate?

In my application I need to get the hour and minute separately: NSString *currentHour=[string1 substringWithRange: ... provide me sample 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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237 views

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ios - Hide keyboard when scroll UITableView

In my app i want hide keyboard when i start scrolling UITableView. I search about this in internet, ... [super scrollViewDidScroll:scrollView]; See Question&Answers more detail:os...

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

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420 views

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ios - Certificate has either expired or has been revoked

A while ago I started coding a new iOS app. After a long break from it, I'm working on it again and have ... Any idea what might be the problem? See Question&Answers more detail:os...

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

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388 views

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ios - UIView with shadow, rounded corners and custom drawRect

I have to create a custom UIView that will have round corners, a border, a shadow and its drawRect() method ... need to be light and performant. See Question&Answers more detail:os...

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

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476 views

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ios - How do I scale a UIButton's imageView?

I created a UIButton instance named "button" with an image using [UIButton setImage:forState:]. The button.frame is larger ... 0, 0, 70, 70); 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 exactly is init coder aDecoder?

I'm learning iOS development from an online course and everytime I make a custom view (custom table view ... put properties inside the init? See Question&Answers more detail:os...

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

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516 views

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ios - UIRefreshControl on UICollectionView only works if the collection fills the height of the container

I'm trying to add a UIRefreshControl to a UICollectionView, but the problem is that the refresh control does not appear ... .size.width, 100); } See Question&Answers more detail:os...

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

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389 views

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ios - Change color of Back button in navigation bar

I am trying to change the color of the Settings button to white, but can't get it to change. I've tried ... How do I make that button white? 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

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ios - iPhone SDK Internet connection detection

I'm working on an iPhone application that makes a few calls to web services. I posted this application on ... Any ideas would be appreciated. See Question&Answers more detail:os...

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

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312 views

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ios - Expanding and collapsing UITableViewCells with DatePicker

I'm building an app that lets the user select dates from a UITableView. The tableView is static and grouped. ... calendar app? Thanks alot! Erik See Question&Answers more detail:os...

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

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464 views

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ios - Xcode debugger doesn't print objects and shows nil, when they aren't

Xcode shows an error when trying to print an object with po <objectName>, but only for one project. error: ... the project had no 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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301 views

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ios - How to handle push notifications if the application is already running?

How do we handle push notifications if the application is already running ? I want to show an alert if the ... alert with a cancel button? See Question&Answers more detail:os...

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

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535 views

1 answer

ios - Error: CUICatalog: Invalid asset name supplied: (null), or invalid scale factor : 2.000000

TableViewApplication[1458:70b] CUICatalog: Invalid asset name supplied: (null), or invalid scale factor: 2.000000 ... which block is affected? See Question&Answers more detail:os...

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

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315 views

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ios - How to check version of a CocoaPods framework

I have updated Flurry via CocoaPods, but how can I check if Flurry was updated? I mean the terminal shown me ... sure that it has been updated. See Question&Answers more detail:os...

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

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658 views

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ios - Are headphones plugged in? iOS7

Developing an app for an iPhone with audio files that need to be listened too through headphones. How do I check if ... YES; } return NO; } See Question&Answers more detail:os...

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

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465 views

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ios - Xcode 8.3 / Xcode 9.0 Refresh provisioning profile devices

I have added some new devices. How can I refresh the provisioning profile, as Xcode 8 automatically manages signing ... not re-downloading 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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269 views

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ios - How do you create a UIImage View Programmatically - Swift

I'm trying to create a UIImage View programmatically, I have a new view and I tried doing this let imageName ... of doing it in the storyboard 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

1 answer

ios - Redirect to application if installed, otherwise to App Store

I know it's possible to link directly to an app in iOS by registering a custom scheme (e.g. so://) ... the http link should redirect to itunes. See Question&Answers more detail:os...

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

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421 views

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ios - How to remove border of the navigationBar in swift?

i've been trying to remove the navigationBars border without luck. I've researched and people seem to tell to ... (named: "") illustration: See Question&Answers more detail:os...

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

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562 views

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ios - How to make custom UIBarButtonItem with image and label?

I would like to make a custom UIBarButtonItem that contains both image and text, something like this: I tried ... What am I doing 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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320 views

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ios - iPhone UITableView. How do turn on the single letter alphabetical list like the Music App?

In the iPhone music app, selecting Artist, Songs, or Albums presents a tableView with a verticl list of single ... in my app? Cheers, Doug See Question&Answers more detail:os...

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

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368 views

1 answer

ios - How to limit UITableView row reordering to a section

I was hitting my head over this one, and google was turning up nothing. I eventually worked it out and thought ... post an even better answer! See Question&Answers more detail:os...

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

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431 views

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ios - @IBDesignable error: IB Designables: Failed to update auto layout status: Interface Builder Cocoa Touch Tool crashed

I have a very simple subclass of UITextView that adds the "Placeholder" functionality that you can find native to ... drawRect(). 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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328 views

1 answer

ios - Convert an NSURL to an NSString

I have an app where the user can choose an image either from the built-in app images or from the iphone ... convert the NSURL to an NSString? See Question&Answers more detail:os...

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

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