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Editorial Team
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Asked: 2026-05-30T20:29:28+00:00

I am guessing this is a basic error… but can’t seem to figure out

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I am guessing this is a basic error… but can’t seem to figure out the following build error (warning)…

Passing 'MessageDetailController *const __strong' to parameter of incompatible type 'id<MFMessageComposeViewControllerDelegate>'

On the following line…

controller.messageComposeDelegate = self;

I have the following declared in the header file…

@interface MessageDetailController : UIViewController <MFMailComposeViewControllerDelegate>
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1 Answer

  1. Editorial Team

    Try This

    controller.mailComposeDelegate = self;

    instead of controller.messageComposeDelegate = self;

    because you have imported the MFMailComposeViewControllerDelegate protocol and i think you are trying to send the mail.

    if i am wrong i.e you are trying to send the Message then you should Adopt the MFMessageComposeViewControllerDelegate Protocol,In this case no need to change the single line of code.

    For more detailed Knowledge of MessageUI Framework take a look of this Link

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