Recent questions tagged iOS

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ios - UICollectionView cell subviews do not resize

In a CollectionView, some cells should have an additional subview or layer. The CollectionView can be told to ... cells. Any help 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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ios - Present and dismiss modal view controller

Can anyone give me the example code that I can use to first present a modal view controller, then dismiss it? This ... , and all logs get "null" 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 8 Swift - TableView with embedded CollectionView

I am relatively new to iOS programming and have tried a few things but to no avail. I would ... /DahanHu/DHCollectionTableView Many thanks Rob 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 - Install Simulator SDK 4.3 to Xcode 4.4 on Mountain Lion

I want to install SDK 4.3 in xcode 4.4 on mountain lion (os x 10.8), but when I installed the 4.3 ... about how to solve this kind of 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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ios - UITableView with static cells does not appear

I have created a new Xcode project using Storyboards (tab view template). I added a couple of view controllers ... indicator, that's all. See Question&Answers more detail:os...

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

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271 views

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ios - Writing handler for UIAlertAction

I'm presenting a UIAlertView to the user and I can't figure out how to write the handler. This is my ... . Any suggestion are much 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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ios - Which has faster performance indexesOfObjectsPassingTest or filteredArrayUsingPredicate?

When needing to filter an NSArray to get a subset of the items in the array returned, which method is quicker more frequently and in edge cases? See Question&Answers more detail:os...

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

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227 views

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ios - Should I declare variables in interface or using property in objective-c arc?

approach 1: @interface MyController : UIViewController { UILabel *myText; } @property (nonatomic, strong) UILabel * ... Thank you very much! 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 - Change the color of default red color delete button in UITableViewCell when swiping rows or click on edit button

I wanted to change the color of minus button and delete button of UITableViewCell when click on edit ... UITableViewCellEditingStyleDelete) { } See Question&Answers more detail:os...

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

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427 views

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ios - didReceiveRemoteNotification:fetchCompletionHandler not being called when app is in background and not connected to Xcode

I've a very strange problem, I implemented: - (void)application:(UIApplication *)application didReceiveRemoteNotification:( ... pushCode = 12; } See Question&Answers more detail:os...

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

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524 views

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ios - Using custom fonts in WKWebView

I'm using custom fonts in my app. They are copied to bundle and hardcoded to appName-info.plist. This fonts ... custom fonts work in WKWebView? 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 implement lazy loading of images in table view using swift

I want to use lazy loading concept for my table view using swift. In my table view i am showing multiple cells ... help me to get the 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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692 views

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ios - How to put an image in a Realm database?

I'm writing an iOS application using Swift 2 and I would like to save profile picture of an account locally in a ... is it bad to do that? See Question&Answers more detail:os...

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

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178 views

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ios - Save images with phimagemanager to custom album?

I am making an app that takes pictures with AVFoundation and I want to save them to a custom album that I ... help/explanations would be great! See Question&Answers more detail:os...

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

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296 views

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ios - Autolayout is ignored in Custom UITableViewCell

Despite having set constraints to all elements, including the vertical ones needed for the cell to calculate its ... see my answer below. See Question&Answers more detail:os...

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

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418 views

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ios - Implement PushKit and test in development behavior

i'd like to implement PushKit service within my app ( Voip app ), but i have following doubt: I see ... message( message was successfully sent ) See Question&Answers more detail:os...

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

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291 views

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ios - Set dimensions for UIImagePickerController "move and scale" cropbox

How does the "move and scale screen" determine dimensions for its cropbox? Basically I would like to ... the UIImagePickerController) 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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174 views

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ios - How to set image for bar button with swift?

I am trying to set an Image for bar button Item for that I have an image like: with resolution 30 * 30 but ... is the batter way to do this? See Question&Answers more detail:os...

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

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264 views

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ios - Saving image to Documents directory and retrieving for email attachment

I having trouble figuring out NSBundle & DocumentDirectory data, I have a Camera Picture "imageView" that I'm ... " fileName:@"savedImage"]; See Question&Answers more detail:os...

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

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529 views

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ios - Getting device orientation in Swift

I was wondering how I can get the current device orientation in Swift? I know there ... UIApplication sharedApplication] statusBarOrientation] See Question&Answers more detail:os...

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

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452 views

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ios - how to make UITextView height dynamic according to text length?

As you can see in this image the UITextView changes it's height according to the text length, I want to make ... there didn't work for me See Question&Answers more detail:os...

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

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544 views

1 answer

ios - Dynamic Height Issue for UITableView Cells (Swift)

Dynamic text of variable length are being injected into tableview cell labels. In order for the tableview cells' ... a better alternate method. See Question&Answers more detail:os...

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

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390 views

1 answer

ios - Swift - How to detect orientation changes

I want to add two images to single image view (i.e for landscape one image and for portrait another ... advice would be greatly 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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275 views

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ios - Encode NSString for XML/HTML

Is there a way to HTML encode a string (NSString) in Objective-C, something along the lines of Server.HtmlEncode in .NET? See Question&Answers more detail:os...

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

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262 views

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ios - Passing arguments to selector in Swift

I'm programmatically adding a UITapGestureRecognizer to one of my views: let gesture = UITapGestureRecognizer(target: ... the gesture handler. 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 - Check if optional array is empty

In Objective-C, when I have an array NSArray *array; and I want to check if it is not empty, I always ... this with just one condition as well. See Question&Answers more detail:os...

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

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691 views

1 answer

ios - How to enable back/left swipe gesture in UINavigationController after setting leftBarButtonItem?

I got the opposite issue from here. By default in iOS7, back swipe gesture of UINavigationController's ... custom leftBarButtonItem? 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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280 views

1 answer

ios - How do I use AVFoundation to crop a video

I'm trying to use AVFoundation to crop videos I'm recording. So lets say i create a ... guidance 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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