Recent questions tagged iOS

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ios - How to only show bottom border of UITextField in Swift

I want to show only bottom border and hide the other sides. Output I see: As you can see I see ... tv_username.textColor = UIColor.whiteColor() See Question&Answers more detail:os...

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

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783 views

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ios - NavigationView and NavigationLink on button click in SwiftUI?

I am trying to push from login view to detail view but not able to make it.even navigation bar is not ... .navigationBarTitle(Text("Login")) } See Question&Answers more detail:os...

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

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498 views

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ios - Auto-Layout Constraint: How to make a view maintains its width/height ratio when resized?

In the interface builder we can pin height, pin width, make two views width equally, but how do I set the ... to do it with code? 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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410 views

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ios - Converting custom class object into NSData

I have a custom class that I want to save into NSUserDefaults. I am told that I need to convert the ... and sometimes very counter-intuitive. See Question&Answers more detail:os...

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

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394 views

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ios - Removing empty space, if the section header is hidden in the UICollectionView

I have two sections in UICollectionView. I want to show a section header in UICollectionView for only 1st section. ... no luck. same result. See Question&Answers more detail:os...

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

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418 views

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ios - Xcode will run app on simulator but not on device

I receive the following error when trying to run the app on my device. error: failed to launch '/Users/michael/Library/ ... 4.3.1 and iOS 5.1 See Question&Answers more detail:os...

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

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293 views

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ios - UILabel not wrapping text correctly sometimes (auto layout)

I have a uilabel setup in a view. It doesn't have a width constraint, but its width is instead determined by ... super was the key. Thanks Matt! See Question&Answers more detail:os...

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

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313 views

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ios - Best practices for making a queue of NSURLSessionTasks

What are the best practices for making a serial queue of NSURLSessionTasks ? In my case, I need to: ... of way of sequencing NSURLSessionTasks? See Question&Answers more detail:os...

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

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280 views

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ios - How do you check current view controller class in Swift?

As far as I know, this would work in Objective-C: self.window.rootViewController.class == myViewController How ... is a specific one? See Question&Answers more detail:os...

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

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403 views

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ios - UICollectionView Invalidate Layout On Bounds Changes

I currently have the following snippet for calculating UICollectionViewCells sizes: - (CGSize)collectionView:( ... changes size? See Question&Answers more detail:os...

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

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295 views

1 answer

ios - How to get file path in iPhone app

I have a problem accessing my files in my app. I am currently using //Directly from TileMap example from ... /Tiles - TileMap does 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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330 views

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ios - UIBarButtonItem: How can I find its frame?

I have a button in a toolbar. How can I grab its frame? Do UIBarButtonItems not have a frame property? See Question&Answers more detail:os...

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

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361 views

1 answer

ios - How to get device width and height?

In Objective-C we can get device width and height by using following code : CGRect sizeRect = [UIScreen mainScreen]. ... do this in with Swift ? See Question&Answers more detail:os...

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

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289 views

1 answer

ios - how to save video file into document directory

I am capturing video using following code: UIImagePickerController *ipc = [[UIImagePickerController alloc] init]; ... into document directory? See Question&Answers more detail:os...

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

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454 views

1 answer

ios - Convert address to coordinates swift

How can I convert a String address to CLLocation coordinates with Swift? I have no code yet, I looked for a ... 't find anyone yet. 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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340 views

1 answer

ios - Draggable UIView Swift 3

I want to be able to drag the objects on the screen, but they wont. I tried everything but still cant. ... i enable again gravity. ScreenShot. See Question&Answers more detail:os...

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

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373 views

1 answer

ios - How to detect and verify a renewal for an auto-renewable subscription?

So I have setup an auto-renewable subscription for my app with a period of 1 month, which equals 5 minutes or so ... do I do that? 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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341 views

1 answer

ios - How to create a custom UITableViewCell programmatically using AutoLayout

I'm trying to implement a UITableView that will behave similarly to the timeline of a twitter ... forCellReuseIdentifier:kCellIDTitleMain]; } See Question&Answers more detail:os...

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

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433 views

1 answer

ios - Convert Apple Emoji (String) to UIImage

I need all Apple Emojis. I can get all the emojis and put them into a String by copying them from the site ... Apple emojis in the right order? See Question&Answers more detail:os...

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

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548 views

1 answer

ios - What's the best way to zoom out and fit all annotations in MapKit

Quick background of what I have going on. UIMapView loads and shows a single annotation (Never more than one). On ... it to zoom out properly. See Question&Answers more detail:os...

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

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690 views

1 answer

ios - unable to dequeue a cell with identifier Cell - must register a nib or a class for the identifier or connect a prototype cell in a storyboard

My UITableViewController is causing a crash with the following error message: Terminating app due to uncaught exception ' ... } } } } See Question&Answers more detail:os...

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

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681 views

1 answer

ios - Errors after updating to Xcode 8: "No such module" and "target overrides the `EMBEDDED_CONTENT_CONTAINS_SWIFT`build setting"

I'm getting No such module for Pods when I try to build the project. If I remove the code expecting this Pod, another ... '] = 'NO' end end end See Question&Answers more detail:os...

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

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252 views

1 answer

ios - iPhone OS: How do I create an NSDate for a specific date?

Seems like a simple thing but I can't seem to find a way to do it. It would be great to see a couple different methods. See Question&Answers more detail:os...

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

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399 views

1 answer

ios - Xcode "The private key for is not installed on this mac - distributing"

I always get this message when I try to submit my app to the app store. Here is a picture of the message: It ... can submit my app to the store. See Question&Answers more detail:os...

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

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880 views

1 answer

ios - AVPlayer "freezes" the app at the start of buffering an audio stream

I am using a subclass of AVQueuePlayer and when I add new AVPlayerItem with a streaming URL the app freezes for about ... do I do this? Thanks. See Question&Answers more detail:os...

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

0 votes

234 views

1 answer

ios - Architectural and design question about uploading photos from iPhone app and S3

I want to allow users of an iPhone app to upload photos and use Amazon S3. There are 2 ways I see going ... server to store the photo at all. See Question&Answers more detail:os...

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

0 votes

289 views

1 answer

ios - Circular UIImageView in UITableView without performance hit?

I have a UIImageView on each of my UITableView cells, that display a remote image (using SDWebImage). I've done ... to get this effect? Thanks. See Question&Answers more detail:os...

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

0 votes

389 views

1 answer

ios - Change UICollectionViewCell size on different device orientations

I am using an UICollectionView with UICollectionViewFlowLayout. I set the size of each cell through the collectionView: ... size of the screen? See Question&Answers more detail:os...

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

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