Recent questions tagged IOS

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ios - Change the alpha value of the navigation bar

Is this possible? I want to change the alpha value of the navigation bar in my view controller (in an animation ... of self.view's background). 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 - How to add my app to the share sheet action

I am trying to add my app to the share sheet. if you look a photo and you press the share button you see ... -like app so it can accept shares See Question&Answers more detail:os...

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

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393 views

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ios - UINavigationController interactivePopGestureRecognizer working abnormal in iOS7

In iOS7, we have a new "swipe left to right" gesture, this is a very useful feature, but now I have a problem ... is there some way to fix it? See Question&Answers more detail:os...

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

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316 views

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ios - Capture 60fps in iPhone app

I am working on a project where we will be using iPhones as cameras for capturing a scene. When recording we ... or tips is much 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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268 views

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ios - Can I use AVAudioEngine to read from a file, process with an audio unit and write to a file, faster than real-time?

I am working on an iOS app that uses AVAudioEngine for various things, including recording audio to a file, ... factory preset shown above). See Question&Answers more detail:os...

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

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232 views

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ios - How to resize UITableViewCell to fit its content?

I have a UITableview with multiple reusable TableViewCells. In one cell I have a UITextView, that resizes itself to fit ... ; } return 0; } See Question&Answers more detail:os...

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

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538 views

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ios - How to properly animate UIScrollView contentOffset

I have UIScrollView subclass. Its content is reusable - about 4 or 5 views are used to display hundreds of elements ... . How can I solve 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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387 views

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ios - CoreAnimation - Opacity Fade In and Out Animation Not Working

I'm attempting to create a fairly simple CoreAnimation for use in an AVComposition. My goal is to ... addAnimation:fadeInAndOut forKey:nil]; See Question&Answers more detail:os...

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

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364 views

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ios - How to animate UITableViewCell height using auto-layout?

There are lot of similar questions on Stack Overflow about UITableViewCell height animation, but nothing works for new ... -layout era, right? See Question&Answers more detail:os...

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

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557 views

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ios - How to display activity indicator in center of UIAlertController?

I currently have a UIAlertController being displayed on the screen. The view of the alert should only display ... screen sizes and orientations. See Question&Answers more detail:os...

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

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285 views

1 answer

ios - Get UIWebView content's Height

I have a uiwebview that loads data using the loadHtmlString function.The thing is i am loading the data from an ... time it is loaded. Thx See Question&Answers more detail:os...

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

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343 views

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ios - UIDatePicker bug? UIControlEventValueChanged after hitting minimum internal

I've run into a weird effect that sure looks like a bug in iOS7 -- but often in the past, ... timer periodically check the current interval? See Question&Answers more detail:os...

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

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372 views

1 answer

ios - Dynamic UICollectionView header size based on UILabel

I've read a bunch of posts on adding header to UICollectionView. In an iOS 7+ app in Swift, I'm ... on how to calculate CGSize correctly? See Question&Answers more detail:os...

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

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425 views

1 answer

ios - Determine MIME type from NSData?

How would you determine the mime type for an NSData object? I plan to have the user to upload a video/ ... // how would I implement getMimeType See Question&Answers more detail:os...

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

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387 views

1 answer

ios - Can I disable custom keyboards (iOS8) for my app?

EDIT: tl;dr - it is possible, see accepted answer below. Is there any (not only programatic) way ... Apple should introduce such functionality? See Question&Answers more detail:os...

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

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282 views

1 answer

ios - Less Blur with `Visual Effect View with Blur`?

Title pretty much asks it all... I'm playing with the iOS8 Visual Effect View with Blur. It's over a ... do anything but make it worse. See Question&Answers more detail:os...

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

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395 views

1 answer

ios - In SwiftUI, how to use UIHostingController inside an UIView or as an UIView?

An alternative question title could be "How to add an UIHostingController's view as subview for an UIView?". I am ... as UIView view. 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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204 views

1 answer

ios - Scale text label by screen size

Is there a way to scale text so that it takes up close to the same screen real estate no matter what the ... to the device screen size. Example See Question&Answers more detail:os...

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

0 votes

393 views

1 answer

ios - Change Background of UICollectionView Cell on Tap

I have a UICollectionView that I have created programmatically. I would like for the collection view to behave in ... and delegate are set. See Question&Answers more detail:os...

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

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303 views

1 answer

ios - Linker error when accessing application module in UI tests in Xcode 7.1

I'm trying to implement some UI tests in my project. Everything goes fine as long as I keep it simple: ... the moment. Any help 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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269 views

1 answer

ios - Where to highlight UICollectionViewCell: delegate or cell?

According to the Collection View Programming Guide one should handle the visual state of the cell highlights in ... of the delegate approach? See Question&Answers more detail:os...

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

0 votes

492 views

1 answer

ios - Set different activity items for UIActivityViewController Swift

I have UIActivityViewController with 4 options: Message / Mail / TW / FB. I want to send different activities for ... found the best for me. See Question&Answers more detail:os...

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

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266 views

1 answer

ios - Callback function syntax in Swift

I am attempting pass a function to another function and then have the passed function executed passing to it a ... know what it should be. See Question&Answers more detail:os...

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

0 votes

183 views

1 answer

ios - WKWebKit javascript execution when not attached to a view hierarchy

I want to switch to WKWebView from UIWebView. In my code, the web view instance is created offscreen (without attaching ... .promise; }; }]); See Question&Answers more detail:os...

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

0 votes

327 views

1 answer

ios - How to use MBProgressHUD with swift

here is my code , but it showing the progress . is there any error in this code? please give some idea to fix this, ... ) { hud.hide(true) } } } See Question&Answers more detail:os...

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

0 votes

333 views

1 answer

ios - UITableViewCell Selected Background Color on Multiple Selection

// Doesn't work cell.selectionStyle = .Blue //Works when the selection is not multiple, if it's multiple ... of the cells which are selected? See Question&Answers more detail:os...

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

0 votes

253 views

1 answer

ios - What is armv7s?

This seems to be a new option in newer XCode - instead of "armv6 armv7" under Valid architectures I now see "armv7 ... for it as well as armv7? See Question&Answers more detail:os...

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

0 votes

486 views

1 answer

ios - Info.plist Utility Error: "Info.plist couldn't be opened because there is no such file"

I'm running into what seems to be common error, in that Xcode can't seem to find my 'Info.plist' file. I've ... it was pre-Xcode 6.3.X). See Question&Answers more detail:os...

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

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