Assigning to 'id<MFMessageComposeViewControllerDelegate>' from incompatible type 'MainViewController *' - iphone

Question

I have the following warning in my code (XCode 4.3 / iOS 4/5) -
Assigning to 'id' from incompatible type 'MainViewController *'
The warning is raised in this section -
- (IBAction)sendInAppSMS:(id)sender
{
MFMessageComposeViewController *controller = [[[MFMessageComposeViewController alloc] init] autorelease];
if([MFMessageComposeViewController canSendText])
{
controller.body = #"A test message from http://www.macoscoders.com";
controller.recipients = [NSArray arrayWithObjects:#"9880182343",nil];
controller.messageComposeDelegate = self;
[self presentModalViewController:controller animated:YES];
}
}
In particular this line -
controller.messageComposeDelegate = self;
In a bit confused as to what is wrong with my code. Googling for the Warning I found some references but I'm having difficulty in understanding the answers.
Any pointers / explanations would be greatly appreciated.
Best regards
rob
My complete .h file -
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#import <AudioToolbox/AudioToolbox.h>
#import <MessageUI/MessageUI.h>
#import "EasyTracker.h"
#interface MainViewController : TrackedUIViewController <MFMailComposeViewControllerDelegate> {
IBOutlet UIView *volumeSlider;
AVPlayer *radiosound;
IBOutlet UIButton *playpausebutton;
IBOutlet UIActivityIndicatorView *activityIndicator;
NSTimer *timer;
}
#property(nonatomic, retain) AVPlayer *radiosound;
#property(nonatomic, retain) UIButton *playpausebutton;
- (void)updatebuttonstatus;
- (void)playCurrentTrack;
- (void)pauseCurrentTrack;
- (IBAction)playbutton;
- (IBAction)openMail:(id)sender;
- (IBAction)sendInAppSMS:(id)sender;
#end
Highlights from my .m file -
#import "MainViewController.h"
#import <AVFoundation/AVFoundation.h>
#import <AudioToolbox/AudioToolbox.h>
#import <MediaPlayer/MediaPlayer.h>
#import "radio99AppDelegate.h"
#implementation MainViewController
- (IBAction)sendInAppSMS:(id)sender
{
MFMessageComposeViewController *controller = [[[MFMessageComposeViewController alloc] init] autorelease];
if([MFMessageComposeViewController canSendText])
{
controller.body = #"A test message from http://www.macoscoders.com";
controller.recipients = [NSArray arrayWithObjects:#"9880182343",nil];
controller.messageComposeDelegate = self;
[self presentModalViewController:controller animated:YES];
}
}
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result
{
switch (result) {
case MessageComposeResultCancelled:
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"SMSTester" message:#"User cancelled sending the SMS"
delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
}
break;
case MessageComposeResultFailed:
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"SMSTester" message:#"Error occured while sending the SMS"
delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
}
break;
case MessageComposeResultSent:
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"SMSTester" message:#"SMS sent successfully..!"
delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
[alert release];
}
break;
default:
break;
}
[self dismissModalViewControllerAnimated:YES];
}
- (IBAction)openMail:(id)sender
{
if ([MFMailComposeViewController canSendMail])
{
MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
mailer.mailComposeDelegate = self;
[mailer setSubject:#"A Message from MobileTuts+"];
NSArray *toRecipients = [NSArray arrayWithObjects:#"fisrtMail#example.com", #"secondMail#example.com", nil];
[mailer setToRecipients:toRecipients];
UIImage *myImage = [UIImage imageNamed:#"mobiletuts-logo.png"];
NSData *imageData = UIImagePNGRepresentation(myImage);
[mailer addAttachmentData:imageData mimeType:#"image/png" fileName:#"mobiletutsImage"];
NSString *emailBody = #"Have you seen the MobileTuts+ web site?";
[mailer setMessageBody:emailBody isHTML:NO];
[self presentModalViewController:mailer animated:YES];
[mailer release];
}
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Failure"
message:#"Your device doesn't support the composer sheet"
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles: nil];
[alert show];
[alert release];
}
}
#pragma mark - MFMailComposeController delegate
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
switch (result)
{
case MFMailComposeResultCancelled:
NSLog(#"Mail cancelled: you cancelled the operation and no email message was queued");
break;
case MFMailComposeResultSaved:
NSLog(#"Mail saved: you saved the email message in the Drafts folder");
break;
case MFMailComposeResultSent:
NSLog(#"Mail send: the email message is queued in the outbox. It is ready to send the next time the user connects to email");
break;
case MFMailComposeResultFailed:
NSLog(#"Mail failed: the email message was nog saved or queued, possibly due to an error");
break;
default:
NSLog(#"Mail not sent");
break;
}
[self dismissModalViewControllerAnimated:YES];
}
#end

Answer 1

You are using:
MFMailComposeViewControllerDelegate
Where it should be:
MFMessageComposeViewControllerDelegate
Change here:
#interface MainViewController : TrackedUIViewController <MFMessageComposeViewControllerDelegate> {

Answer 2

Implement the UINavigationControllerDelegate in your header file.

Answer 3

didn't work with this library, but as I can see, youe MainViewController is MF*Mail*ComposeViewControllerDelegate, but you setting it as MF*Message*ComposeViewControllerDelegate.