Question

I am trying to implement a SMS application. In that when I tried to send my sms I got an exception at [self.navigationController presentModalViewController:picker animated:YES];. I am very new to this. Can you guys please help me?. My code is as follows.

MFMessageComposeViewController *picker = [[MFMessageComposeViewController alloc] init];
picker.delegate = self;

picker.recipients = [NSArray arrayWithObject:@"123456789"]; // your recipient number or self for testing
picker.body = @"test from OS4";

[self.navigationController presentModalViewController:picker animated:YES];
[picker release];

My Log message is as follows,

 Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Application tried to present a nil modal view controller on target <UINavigationController: 0x5b2c120>.

Thanks in Advance,
S.

Answer 1

The message means picker is nil, i.e. the MFMessageComposeViewController is not created successfully.

Make sure [MFMessageComposeViewController canSendText] returns YES, i.e..

 if (![MFMessageComposeViewController canSendText]) {
    // show message box for user that SMS cannot be sent
 } else {
    MFMessageComposeViewController* picker = ...;
    ...
 }