Question

I have the following code in an .mm file:

[UIView animateWithDuration:0.3 animations:^{
    self.titleLabel.alpha = 0.0;
} completion:^(BOOL finished) {    //<<compiler complains here
    self.titleLabel.alpha = 1.0;
}];

But I get the compiler error:

Cannot initialize a parameter of type ‘void (^)(BOOL)’ with an rvalue of type ‘void (^)(int)’

on the line mentioned above. The code is fine in a normal .m file. Am I doing something wrong, or is there a problem with the compiler?

UPDATE: Header imports are:

#import <UIKit/UIKit.h>

and .mm imports are (censored):

#import "XXSelectViewController.h"
#import "XXViewController.h"
#import "AboutViewController.h"
#import "HighScoresViewController.h"
#import "GameModel.h"

UPDATE 2: Also, I get a warning on this line:

- (void)viewDidDisappear:(BOOL)animated

warning:

Conflicting parameter types in implementation of ‘viewDidDisappear:’: ‘BOOL’ (aka ‘signed char’) vs ‘int’

We are using the PowerVR tools in this project, and in PVRShell.h and PVRTResourceFile.h are the following lines:

typedef bool (*PFNReleaseFileFunc)(void* handle);

typedef bool (*PFNReleaseFileFunc)(void* handle);

I don’t know if this has anything to do with the issues though…

Answer 1

It turns out the reason for the errors is because of this line, buried deep within the PVR Tools:

#define BOOL int

So there’s a macro going through all of the code, replacing BOOL with int. Not ideal! I think the reason it’s causing a problem is because the tools were added as a folder and not as an embedded .xcodeproj … So we may need to re-import it. Lesson learned!

Bizarrely though, if I comment out that line, the code still works 😉 but who knows for how long!