Recent questions tagged objective

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objective c - How to resolve 'unrecognized selector sent to instance'?

In the AppDelegate, I'm alloc'ing an instance defined in a static library. This instance has an NSString ... and call classA.downloadUrl. See Question&Answers more detail:os...

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

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objective c - NSURLConnection to upload file asynchonrously?

I'm kinda of new at ios development, I've been reading and searching but cannot find a working example or ... point me in the right direction? See Question&Answers more detail:os...

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

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objective c - How do I automatically activate an item in the OS X Services Menu

I need to have a service I created enabled by default in the services menu. I've created a service for my OS X ... it can be done. 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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objective c - Convert first number in an NSString into an Integer?

I have an NSString like so: @"200hello" or @"0 something" What I would like to be able to do is take the ... 0 something" would become int = 0. See Question&Answers more detail:os...

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

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objective c - Simple way of using irregular shaped buttons

I've finally got my main app release (Tap Play MMO - check it out ;-) ) and I'm now working on expanding ... line when 4.2 comes out for iPad) See Question&Answers more detail:os...

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

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objective c - iOS: How to create PKCS12 (P12) keystore from private key and x509certificate in application programmatically?

This question was apparently similar but had no answers of any kind: Programmatically create a x509 certificate ... return bos.toByteArray(); See Question&Answers more detail:os...

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

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objective c - How to Convert NSInteger to a binary (string) value

I am trying to figure out how to convert an NSInteger, say 56, to an NSString that is a binary ... within Objective C. Thanks 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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objective c - Running background services in iOS

I need to code an iOS app that sends data to server every 30 minutes. Can this work when the app is in the background? How reliable it can be? See Question&Answers more detail:os...

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

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objective c - AVCaptureSession specify resolution and quality of captured images obj-c iphone app

Hi I want to setup AV capture session to capture images with specific resolution (and, if possible, with specific ... s quality. Help me please See Question&Answers more detail:os...

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

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objective c - Deep combine NSDictionaries

I need to merge two NSDictionarys into one provided that if there are dictionaries within the dictionaries, they ... jQuery's extend function. See Question&Answers more detail:os...

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

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480 views

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objective c - iOS CGColor versus UIColor

I am using 2 variations of the same color, a light and dark version, to create a gradient. Code: ... and why are they different? See Question&Answers more detail:os...

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

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objective c - iOS persistent storage strategy

I'm developing an app which will save data to the local file system. The data that will be saved will be ... of DataA should be left untouched) See Question&Answers more detail:os...

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

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objective c - Should I merge .pbxproj files with git using merge=union?

I'm wondering whether the merge=union option in .gitattributes makes sense for .pbxproj files. The manpage ... have experience with 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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443 views

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objective c - NSString - Unicode to ASCII equivalent

I need to convert NSString in unicode to NSString in ASCII changing all local characters: ? to A, ? to S, ó to ... is the simplest way to do 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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524 views

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objective c - CGContext invalid context 0x0

: CGContextSetFillColorWithColor: invalid context 0x0. This is a serious error. This application, or a library it uses, is ... Mac OS X 10.8.5 See Question&Answers more detail:os...

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

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506 views

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objective c - Recommended way to declare delegate properties with ARC

I used to declare all delegate properties as @property (assign) id<FooDelegate> delegate; I was under the impression ... practice in this case? 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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objective c - iOS Tab Bar icons keep getting larger

I am having a problem with my icons in my tabBar. Tapping the same tab bar button repeatedly will keep increasing ... ideas what I should fix? See Question&Answers more detail:os...

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

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485 views

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objective c - Why is detailTextLabel not visible?

detailTextLabel is not visible (code below). Can you tell me why? // Customize the appearance of table view cells. ... .row]; return cell; } See Question&Answers more detail:os...

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

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314 views

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objective c - Logic For Moving Text Field Above Keyboard On Tap

Right now, I have basic code for moving the textfield above the keyboard when you start editing. However, the ... } [UIView commitAnimations]; } 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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objective c - setStatusBarOrientation:animated: not working in iOS 6

I've used this code to force an orientation change back to portrait when the user is finished watching the video ... for your time and effort. See Question&Answers more detail:os...

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

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379 views

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objective c - AFNetworking + Pause/ Resume downloading big files

I need to download large .zip files (up to 800 MB) with my iPad app. I want to resume the download again if ... do here? } Thanks for your help. See Question&Answers more detail:os...

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

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378 views

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objective c - Animation of stroke of circle segment ends in complete stroke

I'm trying to animate the appearance of a segment of a circle. To archive this I use a CABasicAnimations ... forKey:@"drawCircleAnimation"]; } See Question&Answers more detail:os...

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

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276 views

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objective c - Poor UICollectionView Scrolling Performance With UIImage

I have a UICollectionView in my app, and each cell is a UIImageView and some text labels. The problem is ... to implement that. Many 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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430 views

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objective c - How to rotate an object around a arbitrary point?

I want to rotate an UILabel around an arbitrary point in a circular manner, not a straight line. This is my ... */ [UILabel commitAnimations]; } 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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objective c - Converting NSArray -> JSON -> NSData -> PHP server ->JSON representation

I am converting an Array of NSDictionaries to JSON data with the following... Create my data... NSMutableArray * ... title = MySong; } ) See Question&Answers more detail:os...

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

0 votes

344 views

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objective c - How do I make an OS X application react when a file, picture, etc is dropped on its dock icon?

Some applications, like Photoshop, allow users to drag a picture from a web browser, or drag a file from ... any solutions in any languages. 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

1 answer

objective c - VoiceOver: force an accessibility element to be selected after a screen transition

I'm in the process of making my iOS app accessible and I'm nearly finished. My app contains several custom ... way to force VoiceOver focus? 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

1 answer

objective c - Autosynthesized property 'delegate' will use synthesized instance variable '_delegate', not existing instance variable 'delegate'

I'm following the guide here to create a custom delegate. It runs fine but I get the following warning in xcode ... to get rid of the warning See Question&Answers more detail:os...

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

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