Unlike Android, iPhone allows users setting their preferred language code in iPhone. If you want to get the preferred language, the following piece of codes should help.
NSString *language = [[NSLocale preferredLanguages] objectAtIndex:0];
Continue reading iPhone – Get the iPhone Preferred Language Codes
When iPhone rings, the running application will quit until the phone call ends. So in code level, how could we handle this situation.
I found a post by Norman McEntire and he talked about the application behavior when the phone rings. Here is what he found.
Continue reading iPhone – Handle the Application Termination When the Phone Rings
I am working for my next iPhone application which will create an audio file and save it in the Documents directory. I also created a table view which listed all the audio files such that user can delete them. Please note that the Documents directory is the only place where you can store your application files.
Continue reading iPhone – Delete Files in the Documents Directory of your iPhone Application
Update @ 2012-08-02: If you are using XCode 4.3 or above. You could following the instruction provided by S.Littlehales.
I found that if u set an image to the UIBarButtomItem directly, only the shape of the image is shown in the view without any color. If you want to add an button image to UIBarButtonItem, you have to create a UIButton and set it to the view of the UIBarButtonItem.
Continue reading iPhone – Adding Image to UIBarButtonItem
We can use AVAudioPlayer to play music. Now i want to add an UISlider as the music progress bar and user can fast skip the music.
Now i have a play button in the view and when user click it, i will play the music file as well as the following method.
If you want to add a UISlider to a UIToolbar, you have to wrap the UISlider as a UIBarButtomItem. The following code should help.
Continue reading iPhone – Adding UISlider to UIToolbar
Yesterday we talk about how to make use of the NSTimer for scheduling a task.
iPhone – NSTimer Example
Sometimes, you may want to stop the scheduled task. Then you can use the invalidate method. If you invalidate a unfired NSTimer, that’s fine. But if you invalidate a fired NSTimer, the application will crashed. So how to by pass the problem?
Continue reading iPhone – Stop the Scheduled NSTimer
If you want to scheduled a task, NSTimer can help you. Here comes the example.
MyViewController.h
...
@interface MyViewController : UIViewController {
NSTimer *aTimer;
}
@property (nonatomic, retain) NSTimer *aTimer;
...
Before initializing the AVAudioRecorder, we need to configure the record setting such as the sampling rate and the audio format.
Most of the AVAudioRecorder examples in web have similar record setting as follow: Continue reading iPhone – AVAudioRecorder mono playback problem
Sometime you may need to bundle your files with the resource folder of the Xcode project such that u can manipulate those files on the fly.
If you have a resource file named as readme.txt, you can get the file path by
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"readme" ofType:@"txt"];
Eureka! 