IBActions are not working in another viewcontroller - iphone

Question

i have created a project which has different xib viewcontrollers.In first view am selecting an image through picker controller and am displaying it in the secondviewcontroller.In secondview controller i have some buttons and i have given some IBActions to them.Here starts my problem that am successfully displaying the image in secondviewcontorller but when i tap on button in that viewcontroller app is terminating and the debugger showing the error message as program terminated due to uncaught exception
Here is the code:
To select the pic through pickercontroller in first view
-(IBAction)btnChoosePicClicked {
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
{
UIImagePickerController *picker=[[UIImagePickerController alloc] init];
picker.delegate=self;
picker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
[picker release];
}
else
{
UIAlertView *alert =[[UIAlertView alloc]initWithTitle:#"Error accessing photo library" message:#"Device does not support a photo library" delegate:nil cancelButtonTitle:#"Drat!" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
displaying in the second view and assigning the actions .h file
#interface editScreen : UIViewController{
IBOutlet UIButton *btnRotate;
IBOutlet UIButton *btnLibrary;
IBOutlet UIImageView *imgView;
int RotateAngle;
}
-(void)setImage:(UIImage *)img;
-(IBAction)btnLibraryClicked;
-(IBAction)RotateImage;
#end
.m file
#implementation editScreen
-(void)setImage:(UIImage *)img
{
[imgView setImage:img];
imgView.userInteractionEnabled = YES;
}
-(IBAction)RotateImage
{
CGAffineTransform transform = imgView.transform;
transform = CGAffineTransformRotate(transform, M_PI/2);
imgView.transform=transform;
RotateAngle+=90;
if(RotateAngle>=360)
{
RotateAngle-=360;
}
//imageview.transform = CGAffineTransformScale(imageview.transform, -1.0, 1.0);
}
-(IBAction)btnLibraryClicked {
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
{
UIImagePickerController *picker=[[UIImagePickerController alloc] init];
picker.delegate=self;
picker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
[picker release];
// NSFileHandle *fileHandle = [[NSFileHandle alloc]initWithFileDescript
}
else
{
UIAlertView *alert =[[UIAlertView alloc]initWithTitle:#"Error accessing photo library" message:#"Device does not support a photo library" delegate:nil cancelButtonTitle:#"Drat!" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
I dont know whats wrong with my code please help me.I have given appropriate connections in IB..
Thanks in Advance

Answer 1

For some UIKit class, his delegate has some methods which must be implemented.
For example, UIImagePickerViewControllerDelegate must implement following methods:
– imagePickerController:didFinishPickingMediaWithInfo:
– imagePickerControllerDidCancel:
For your above codes, I don't know whether these methods are implemented or not. Hope these information can help you.