Recent questions tagged iPhone

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iphone - What's the proper way to add a view controller to the view hierarchy?

I have a view controller (A) that loads a view controller (B) and uses it's view in my view hierarchy. If ... the events that I need to forward? See Question&Answers more detail:os...

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

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662 views

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iphone - How to use NSNotification

In my application there is two viewControllers as FirstViewController and DetailViewController. When tap on a table ... :YES]; } See Question&Answers more detail:os...

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

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530 views

1 answer

iphone - How to use a Google offline access token to authenticate in background on iOS?

Short version: I want to use the Google OAuth2 client for Objective C to create a valid GTMOAuth2Authentication ... client Thanks for reading! See Question&Answers more detail:os...

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

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709 views

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iphone - how to sort an NSArray using compare:options

I have an NSArray containing numbers as NSString objects. ie. [array addObject:[NSString stringWithFormat:@"%d", ... an example/sample code. See Question&Answers more detail:os...

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

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667 views

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iphone - viewdidunload is not getting called at all

My problem is like this: Parent class loads a child view. Child removes itself during an action by using " ... 's viewdidunload is not called! See Question&Answers more detail:os...

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

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696 views

1 answer

iphone - what is the difference between strong (in LLVM) and retain( in GCC)?

what is the difference between strong (in LLVM compiler) and retain( in GCC compiler) ? See Question&Answers more detail:os...

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

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714 views

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iphone - How to detect change in network with Reachability?

I'm currently checking network connection on viewDidLoad using this: -(BOOL)reachable { ReachabilityDRC *r = [ ... do something like that? See Question&Answers more detail:os...

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

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525 views

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iphone - How to ensure access to my web service from my code only?

I am writing a very simple web service for my iPhone app. Let's say this is a http page that ... server by only allowing legitimate requests. See Question&Answers more detail:os...

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

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784 views

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iphone - UITableView doesn't keep row selected upon return

i have several table views in my app. I am familiar with the usual behaviour of tables, that when you ... [super viewWillAppear:animated]; } See Question&Answers more detail:os...

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

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729 views

1 answer

iphone - UIImagePNGRepresentation slow or am I doing something wrong?

I'm working on an iPhone App that uses the camera to take pictures, then I'm saving them to the ... I doing something terribly wrong? 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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707 views

1 answer

iphone - What's the difference between GLKView and EAGLView?

I've seen both EAGLView and GLKView used in iOS applications. What's the difference between them? See Question&Answers more detail:os...

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

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640 views

1 answer

iphone - Objective c - NSMutableSet unique object property

In my app I have a class Person with personId property. Now I need some data structure to hold a bunch of unique ... it won't add it twice. See Question&Answers more detail:os...

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

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703 views

1 answer

iphone - Detect direction of UIScrollView scroll in scrollViewWillBeginDragging

I did google enough, & I did check posts like these ( Finding the direction of scrolling in a UIScrollView? ) in ... it'll not serve my purpose. See Question&Answers more detail:os...

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

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632 views

1 answer

iphone - How might I check if a particular NSString is present in an NSArray?

How might I check if a particular NSString is presnet in an NSArray? See Question&Answers more detail:os...

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

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725 views

1 answer

iphone - how to Play movie in portrait mode

Can i play movie in portrait mode?If yes than how to play? See Question&Answers more detail:os...

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

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683 views

1 answer

iphone - iOS 5 - CTCallCenter not working for me

My phone: iOS 5.1.1 Jailbroken using Absynth2 What I'm trying to do: detect an incoming call or when a ... ; any help is appreciated. 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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715 views

1 answer

iphone - Upload ALAsset URL images to the server

I am trying to access iPhone's photo album photo images through ALAssetsLibrary and upload(send) the images to my ... this case? Thank you! See Question&Answers more detail:os...

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

0 votes

606 views

1 answer

iphone - Why isn't my UIViewController in the responder chain for its view?

I have written a subclass of UIViewController which creates a view programmatically, instead of loading it from a NIB ... . What am I missing? See Question&Answers more detail:os...

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

0 votes

854 views

1 answer

iphone - How can I erase UIBezierPath lines drawn on a transparent view above an image?

I am creating an app like whiteboard application. I have one dynamic image. Image has multiple colors. I want to ... this problem. Thanks a lot See Question&Answers more detail:os...

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

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582 views

1 answer

iphone - GLImageProcessing Multiple Filters?

I have read through this question here: Can example "GLImageProcessing" work with multi filters However, I still do ... val); glCheckError(); } See Question&Answers more detail:os...

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

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641 views

1 answer

iphone - UIAlertView not displaying complete message

I have the following function to display error messages to user. But it does not seem to show the complete message ... ]; [alertView release]; } See Question&Answers more detail:os...

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

0 votes

609 views

1 answer

iphone - How to split Code for iOS 3.0 and iOS 3.2 so I can use MPMoviePlayerViewController if OS 3.2++

I have a video that I play. To use full screen in iOS 3.2 I use the MPMoviePlayerViewController (seems to only work ... for iOS 3.2 ++ #endif See Question&Answers more detail:os...

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

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697 views

1 answer

iphone - Push another View in UINavigationController?

How to push a view using a button in a navigation controller? I tried to follow this example: http://www.cimgf ... 're not linked to any method. See Question&Answers more detail:os...

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

0 votes

641 views

1 answer

iphone - How to Programmatically Take Photos While Recording Video

The iPhone 5S is capable of taking pictures while recording video and I am trying to figure out how I would ... direction that would be great. See Question&Answers more detail:os...

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

0 votes

673 views

1 answer

iphone - Flipped NSString drawing in CGContext

I try to draw a string in this texture: http://picasaweb.google.it/lh/photo/LkYWBv_S_9v2d6BAfbrhag?feat=directlink ... sorry for my english ;) See Question&Answers more detail:os...

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

0 votes

662 views

1 answer

iphone - UIVIew Flip Vertical Animation

Given: [UIView beginAnimations:nil context:nil]; [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; [UIView ... in advance. See Question&Answers more detail:os...

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

0 votes

699 views

1 answer

iphone - Does every thread need its own autorelease pool?

Does every thread have to have its own pool? I am writing an iPhone app which uses threads. If I do not put a ... the thread. How can I do it? See Question&Answers more detail:os...

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

0 votes

756 views

1 answer

iphone - SCNetworkReachabilityGetFlags returns 0 even when wireless available

I have an app that uses Apples reachability code. When I tab out of the app, turn on airplane mode, go back ... playing with it for hours... See Question&Answers more detail:os...

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

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