All Questions
6,291
questions
299
votes
10
answers
231k
views
How can we programmatically detect which iOS version is device running on? [duplicate]
I want to check if the user is running the app on iOS less than 5.0 and display a label in the app.
How do I detect which iOS is running on user's device programmatically?
Thanks!
- 9,219
237
votes
9
answers
140k
views
How can I use NSError in my iPhone App?
I am working on catching errors in my app, and I am looking into using NSError. I am slightly confused about how to use it, and how to populate it.
Could someone provide an example on how I populate ...
- 41.9k
194
votes
13
answers
111k
views
Handling applicationDidBecomeActive - "How can a view controller respond to the app becoming Active?"
I have the UIApplicationDelegate protocol in my main AppDelegate.m class, with the applicationDidBecomeActive method defined.
I want to call a method when the application returns from the background,...
- 8,735
128
votes
16
answers
82k
views
iPhone : How to detect the end of slider drag?
How to detect the event when the user has ended the drag of a slider pointer?
- 2,444
115
votes
18
answers
94k
views
How to change Xcode Project name
I have developed my app in Xcode for iPhone, in start I have just named it without secnec now I want to change my app name I have replace my old app name with new one as I have found the name in my ...
- 1,185
94
votes
4
answers
66k
views
How to cancel UIView block-based animation?
I've searched loads of SO stuff and in Apple's references, but still unable to manage my problem.
What I have:
A screen with 2 UIImageViews and 2 UIButtons connected to them
2 kinds of animation:
...
- 4,318
90
votes
6
answers
42k
views
How to print or log the value of CGSize object?
I was trying to log (print) the value of CGSize object like this:
CGSize sizeOfTab = CGSizeMake(self.frame.size.width/tabCount, 49);
NSLog(@"size of tab is %@",sizeOfTab);
Is there anything wrong ...
- 1,904
85
votes
4
answers
74k
views
Using [UIColor colorWithRed:green:blue:alpha:] doesn't work with UITableView seperatorColor?
I'm trying to configure a dark gray seperator color. Why does the following do nothing?
self.tableView.seperatorStyle = UITableViewCellSeperatorStyleSingleLine;
self.tableView.seperatorColor = [...
- 5,071
84
votes
8
answers
125k
views
How to parse the Manifest.mbdb file in an iOS 4.0 iTunes Backup
In iOS 4.0 Apple has redesigned the backup process.
iTunes used to store a list of filenames associated with backup files in the Manifest.plist file, but in iOS 4.0 it has moved this information to ...
- 1,569
83
votes
10
answers
291k
views
What programming languages can one use to develop iPhone, iPod Touch and iPad (iOS) applications?
What programming languages can one use to develop iPhone, iPod Touch and iPad (iOS) applications?
Also are there plans in the future to expand the amount of programming languages that iOS will ...
pylonicon
80
votes
4
answers
79k
views
Install Xcode 3.2.3 w/ iPhone SDK 4, get "Base SDK missing", can't see other SDKs
I created this community wiki to bind together a number of
other Q/A's I've seen here on SO. If you're here, you've probably
installed the final version of Xcode 3.2.3 with iPhone SDK 4 (download
link,...
68
votes
20
answers
54k
views
iPhone UINavigation Issue - nested push animation can result in corrupted navigation bar
I keep getting the following errors:
2011-04-02 14:55:23.350 AppName[42430:207] nested push animation can result in corrupted navigation bar
2011-04-02 14:55:23.352 AppName[42430:207] nested push ...
- 3,381
67
votes
9
answers
66k
views
Center Align text in UITableViewCell problem
I'm kinda new to Objective-C and iPhone development and I've come across a problem when trying to center the text in a table cell. I've searched google but the solutions are for an old SDK bug that ...
- 7,113
66
votes
7
answers
51k
views
applicationWillTerminate when is it called and when not
Hi I have read several questions on SO about applicationWillTerminate getting called and not getting called.
I wanted to summarize what I understood as there are several posts that speak differently.
...
- 4,212
65
votes
7
answers
35k
views
AVCaptureVideoPreviewLayer doesn't fill up whole iPhone 4S Screen
AVCaptureVideoPreviewLayer *avLayer =
[AVCaptureVideoPreviewLayer layerWithSession:session];
avLayer.frame = self.view.frame;
[self.view.layer addSublayer:avLayer];
I use ...
- 1,170
64
votes
8
answers
68k
views
How to get keyboard with Next, Previous and Done Button?
I want to have a keyboard which has a Next,Previous and Done button on top of it.
I have seen that in many apps.
Especially where there are forms to be filled.
I want to achieve something similar ...
- 19.5k
62
votes
21
answers
91k
views
How to add a UIView above the current UITableViewController
I have difficulty adding a subview (UIView) from within the viewDidLoad method of a UITableViewController
This works:
[self.view addSubview:self.progView];
But you can see the table cell lines ...
- 725
60
votes
15
answers
65k
views
How to check if a font is available in version of iOS?
I'm currently working on an app that uses the "ChalkboardSE-Regular" font and my deployment target is 4.0+. This font was not available in 4.1 but it is supported in 4.3. What would be the best way ...
- 833
60
votes
10
answers
64k
views
How to get audio volume level, and volume changed notifications on iOS?
I'm writing a very simple application that plays a sound when pressing a button. Since that button does not make a lot of sense when the device is set to silence I want to disable it when the device's ...
- 701
60
votes
1
answer
15k
views
How to make an iPhone app compatible with multiple SDK (firmware) versions
With iOS 4 coming out soon, I have already planned to include an iAd in a future update of an app of mine. I assume that this will make my app unusable for anyone on a firmware lower than 4.0. Is ...
- 2,358
59
votes
3
answers
24k
views
57
votes
6
answers
79k
views
didReceiveRemoteNotification when in background
These kind of question has been asked a number of times but i have some specific situation going on.
When my application is active and I receive a PUSH message i'm successfully able to parse the ...
- 639
55
votes
3
answers
46k
views
What are block-based animation methods in iPhone OS 4.0?
I am trying to implement a game using the iPhone OS 4.0 (iOS4?) SDK. In the previous versions of the SDK, I've been using the [UIView beginAnimations:context:] and [UIView commitAnimations] to create ...
- 893
55
votes
3
answers
29k
views
AVPlayer vs. AVAudioPlayer
The documentation for AVPlayer states the following:
[The] player works equally well with local and remote media files
However, the documentation for AVAudioPlayer states the following:
Apple ...
- 5,922
55
votes
2
answers
35k
views
How to share keychain data between iOS applications
I am describing a problem for which it took me quite some time to learn the answer.
The "GenericKeychain" example is a good start at providing a wrapper for sharing keychain data between applications ...
- 2,727
54
votes
7
answers
50k
views
How to change the UISwitch default color(blue)
How to change the default color(blue) of a UISwitch?
- 1,904
52
votes
11
answers
74k
views
How to remove gesture recogniser
SO, I am adding a gesture recogniser to an overlay view. When tapped on screen i want this overlay to go away. Having said that adding a gesture recognizer overrides the "touch up inside" and other ...
- 4,451
52
votes
4
answers
57k
views
iOS change accessibility focus
Is there a way to set the accessibility focus programatically (App Store safe)? Any help will be greatly appreciated.
- 1,717
51
votes
7
answers
34k
views
Deleting all the files in the iPhone sandbox (documents folder)?
Is there an easy way to delete all the files(images) I saved in the documents folder of the app?
- 1,125
51
votes
7
answers
84k
views
Force iphone app to restart programmatically?
I am trying to get my iPhone app to restart programmatically when the Logout button is pressed.
Has anyone got a code sample to share? I've read that it is possible by modifying the main.m file but I ...
- 799
51
votes
2
answers
46k
views
Gyroscope vs Accelerometer?
Now that iOS 4 is no longer NDA, I would like to know what Gyroscope has to offer over the Accelerometer for developers. Is there a difference in APIs? Other things?
- 57.9k
50
votes
26
answers
99k
views
How to give space between two cells in tableview?
I want a space between two cell in table view,
I want cell like this,
How can i do that?
- 2,395
49
votes
5
answers
9k
views
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 about this:
Upload from iPhone to my server, which proxies it then to Amazon S3.
Upload from ...
- 8,116
48
votes
10
answers
40k
views
Cancel UILocalNotification
I have a problem with my UILocalNotification.
I am scheduling the notification with my method.
- (void) sendNewNoteLocalReminder:(NSDate *)date alrt:(NSString *)title
{
// some code ...
...
- 1,495
47
votes
10
answers
71k
views
Dial a phone number with an access code programmatically in iOS
How can I dial a phone number that includes a number and access code programmatically in iOS?
For example:
number: 900-3440-567
Access Code: 65445
- 2,585
46
votes
3
answers
16k
views
iOS 4 app crashes at startup on iOS 3.1.3: Symbol not found: __NSConcreteStackBlock
I'm running Xcode 3.2.3 with the iOS 4.0 SDK. I built my app with Base SDK = iphoneos4.0, Active SDK = iphoneos4.0, Deployment Target = 3.1.3, and Architecture = standard (arm6 arm7). Compiler = GCC 4....
- 14.5k
45
votes
2
answers
26k
views
How do you disable auto build in xcode
The latest Xcode builds while coding... It gets stuff wrong and slows my Mac down. How do I disable this and have it build on demand?
- 2,489
45
votes
7
answers
39k
views
360° panorama libraries for ios [closed]
Are there any libraries or classes out there to show a 360 degree panorama on the iPhone?
I found this here: http://code.google.com/p/panoramagl/
but it's not up to date and only for old versions of ...
- 24.9k
44
votes
5
answers
71k
views
dismissViewControllerAnimated is called but ViewController is not dismissed
I am having a problems with the dismissViewControllerAnimated method not closing down the view.
What is happening in the app here is:
Cell in ItemViewController is selected.
View is pushed to ...
- 2,775
44
votes
6
answers
95k
views
iOS installing apps without app store [closed]
is there any LEGAL way (w/o jailbreak) to install iOS application to iOS device (ipad, iphone, ipod) without publishing to application store? For example - application for closed group of users (...
- 2,845
43
votes
5
answers
31k
views
How to create dSYM file in XCode 4?
Can you please let me know how can I create .dSYM file using XCode 4?
Thanks!
- 9,219
43
votes
6
answers
52k
views
How to check programmatically if an App is installed?
I am developing an iPhone application which will install few third party applications in an enterprise. I have the information about the bundle IDs. Is there a way to check if the application is ...
- 544
43
votes
7
answers
82k
views
Programmatically set image and text on UIButton
I need to create button programatically with an image for normal and highlighted state as well text. I cannot build it using Interface Builder, because I need to create buttons over a UIScrollView. ...
- 2,561
42
votes
11
answers
51k
views
How to crop UIImage on oval shape or circle shape?
Please give ideas for how to crop UIImage on oval shape or circle shape. Please share your ideas.
- 1,871
42
votes
4
answers
29k
views
Play local notification default sound when displaying UIAlertView?
I'm writing a reminders app for iPhone that displays reminders using local notifications.
If a reminder goes off while the application is running, the local notification isn't displayed. Instead, the ...
- 1,423
40
votes
3
answers
33k
views
How can I create and display a UISlider programmatically in iOS?
I found the code below in the Apple documentation and added it to my viewDidLoad method but the slider doesn't appear when I run the code.
CGRect frame = CGRectMake(0.0, 0.0, 200.0, 10.0);
UISlider *...
- 5,952
40
votes
3
answers
25k
views
How to steal touches from UIScrollView?
Today on my creative time I did some quite comprehensive research on how to steal touches from a UIScrollView and send them instantly to a specific subview, while maintaining the default behavior for ...
- 41.7k
39
votes
6
answers
27k
views
Day Name From NSDate?
I would like to show the name of day in my iPhone application and i don't found the solution.
Thanks for help
- 635
39
votes
7
answers
53k
views
How to solve this error? "property with 'retain(or strong)' attribute must be of object type"
I have been working on an app all day which has been working fine until Xcode downloaded libraries or something and then it started having issues. I am just trying to create the getter/setter methods ...
- 2,329
39
votes
6
answers
131k
views
How to keep an iPhone app running on background fully operational
first of all, I know there is only support for voip, audio and location apps to run in background and that they will run just while the audio is been played or while using location services, etc.
...
- 1,911