Recent questions tagged objective

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objective c - Expanding and collapsing tableView sections iOS?

I am able to expand and collapse the tableView sections successfully however I am not able to do it for individual sections ... 0; } 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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objective c - Loading images for animation in UIImageView - iOS

I have around 300 images to be loaded for animation the images are named loading001.png, loading002.png, loading003. ... able to figure it out. See Question&Answers more detail:os...

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

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objective c - Log a message send to nil?

I know that messaging nil is not an error, and generally it's not an issue, but at times it would be nice ... to the console when it happens. See Question&Answers more detail:os...

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

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objective c - iphone-sdk: Adding a textfield to UIAlertview does not work in iOS 4?

I am trying to add uitextfield to my alterview. When the user tries to enter text the alterview is supposed to ... tableView reloadData]; } } } See Question&Answers more detail:os...

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

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objective c - NSString immutable allows to change its values?

The code below compiles and runs, BUT according to all iPhone development books and Apple documentation it shouldnt! Can ... test = @"TEST2"; See Question&Answers more detail:os...

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

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979 views

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objective c - Acceptable ways to release a property

Assume there is a class with the following interface: #import <Foundation/Foundation.h> @interface MyClass : NSObject ... [NSDate alloc] init]; See Question&Answers more detail:os...

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

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993 views

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objective c - NSMutableDictionary is adding quotes to keys and values - why?

I'm trying to add some additional key/value pairs to an NSMutableDictionary, using: Tag *tag1 = [results1 ... the value? 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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objective c - Google maps iOS sdk get tapped overlay coordinates

i'm working with Google maps iOS sdk. i want to get the coordinates of the touched point when user taps ... any suggestion's precious! 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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objective c - Call a function in AppDelegate?

Following the solution (the highest-voted answer actually) at UITextField Example in Cocos2d, I managed ... becomeFirstResponder]; } See Question&Answers more detail:os...

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

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objective c - Handling multiple UISwitch controls in a table view without using tag property

I have a table view controller with multiple UISwitch controls in them. I set the delegate to the table view ... do something useful with 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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objective c - NSCollectionView does not scroll items past initial visible rect

I'm running into an issue with an existing app while trying to fix a few outstanding macOS 10.13 bugs. I have a ... is breaking on 10.13 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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objective c - Reference to ' ' is ambigous error in Xcode

I was working with a custom iOS framework project in Xcode.There I am getting a lot of errors mentioning " ... .Please help me correcting 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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objective c - Use of beginAnimations discouraged

I was informed recently by meronix that use of beginAnimations is discouraged. Reading through the UIView class ... link would be nice. See Question&Answers more detail:os...

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

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objective c - Play/Pause and Elapsed Time not updating in iOS command center properly

I have a video player that can play from the iOS command center and lock screen. When I toggle a play/ ... and elapsed time are incorrect. See Question&Answers more detail:os...

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

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1.2k views

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objective c - Storing email in keychain impossible (KeychainItemWrapper)

I'm using the ARCified version of KeychainItemWrapper available at github, and I can't get it to store both ... be going wrong here ? 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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907 views

1 answer

objective c - How to get iPhone contacts in iPhone application

I want to get all the iPhone contacts in my iphone application.Is it possible?If so how?Anybody please help 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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objective c - How to render a radial gradient onto a new UIImage on an iphone

Just wondering how to render a radial gradient (point > circle) onto a new UIImage (iphone). I saw ... . Any suggestions 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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992 views

1 answer

objective c - dismissing the keyboard from a UITextField,UITextView as a subview of UIScrollView?

I have an application with UIScrollView added as a subview of UIView. i have added UITextField,UITextview as a subView ... how can i 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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1.1k views

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objective c - didFinishLoadForFrame doesn't work

I've created a very simple Mac program to load a web page. It works and loads it well but I can't run ... I can not use delegate 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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854 views

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objective c - Fetch aggregate data from NSManagedObject using another expression as argument to sum: expression

Is it possible to use expression as argument for sum: expression? I have entity (NSManagedObject class) Drink ... argument for sum: expression? See Question&Answers more detail:os...

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

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764 views

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objective c - Should I prefer to use literal syntax or constructors for creating dictionaries and arrays?

I am reading through the iOS Developer Guide to get familiarized with the Objective-C language and currently ... matter of personal preference? See Question&Answers more detail:os...

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

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925 views

1 answer

objective c - Reliable access and modify captured camera frames under SceneKit

I try to add a B&W filter to the camera images of an ARSCNView, then render colored AR objects over it. I' ... the camera feed reliably to BW? See Question&Answers more detail:os...

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

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948 views

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objective c - Sorting in nsmutable array

Suppose I have following data in my game. I have developed game in cocos2d. Name Score Sagar 10000 Amit 2000 ... by score. Is it 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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874 views

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objective c - UILabel stops animations

I have 5 UIImageViews getting animated down the screen. If one is pressed, and it meets the requirements, it will add ... 0.0 constant:-55.0]]; See Question&Answers more detail:os...

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

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1.3k views

1 answer

objective c - How to use UINavigationBarAppearance in iOS 13

How do you use this new object to customize the navigation bar in iOS 13? I tried the ... /uikit/uinavigationbarappearance?language=objc See Question&Answers more detail:os...

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

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933 views

1 answer

objective c - Scaning static UIImage using ios ZBar SDK

I want to scan a static UIImage using Zbar sdk, it gives error i.e. ZBarSymbol is Null I also checked ... barcode afterDelay: .5]; } See Question&Answers more detail:os...

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

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1.0k views

1 answer

objective c - How to write Int32 to NSOutputStream in Swift

I'm trying to write an Int32 to an NSOutputStream in Swift and I'm having difficulties. In ObjC, I would ... going about this the wrong way. See Question&Answers more detail:os...

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

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1.1k views

1 answer

objective c - Apple Mach-O Linker Error when using Google Maps SDK for IOS

I am trying to use the Google Maps SDK in my app. So far, I have linked all the frameworks. I am pretty sure ... t put my finger on it. 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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