CODEWITHSUNDEEP
objective-cparametersstruct
user3290191
user3290191

Reputation: 19

Sending 'CGFloat' (aka 'float') to parameter incompatible type 'CGSize' (aka 'struct CGSize')

I'm using the latest version of xcode 5.

I get this error twice in the following code:

 + (SemiSecretFont *)fontWithName:(NSString *)name
            size:(CGFloat) size;
 {
 //dynamically search for a class with this name
 Class klass = NSClassFromString([NSString stringWithFormat:@"%@Font", name]);
 //NSLog(@"looking for font: %@", name);
 //  NSLog(@"klass: %@", klass);
 SemiSecretFont * font = nil;
 if (klass)
font = [[[klass alloc] initWithSize:size] autorelease]; //error occurs here
 return font;
}

 - (id) fontWithSize:(CGFloat)s
 {
   Class klass = [self class];
   SemiSecretFont * f = nil;
   f = [[[klass alloc] initWithSize:s] autorelease]; //error occurs here again
   return f;
 }

The error: Sending 'CGFloat' (aka 'float') to parameter incompatible type 'CGSize' (aka 'struct CGSize')

I also get a warning: Multiple methods named 'initWithSize:' found

Update:

Here's my initWithSize declaration code...

 //this is not meant to be instantiated directly!
 - (id) initWithSize:(CGFloat)fontsize
 {
   if ((self = [super init])) {
   size = fontsize;
   font = nil;
 }
 return self;
 }

Upvotes: 1

Views: 7628

Answers (1)

Martin R
Martin R

Reputation: 539805

This seems to be from https://github.com/ericjohnson/canabalt-ios, and 

+ (SemiSecretFont *)fontWithName:(NSString *)name size:(CGFloat) size;

seems to be a factory method, that returns an instance of SemiSecretFont or some subclass. But when compiling

font = [[[klass alloc] initWithSize:size] autorelease]; //error occurs here

the compiler does not know that kclass is the SemiSecretFont class (or a subclass) which has a method

- (id) initWithSize:(CGFloat)fontsize;

Theoretically, it could be an instance of NSTextContainer, which has the method

- (id)initWithSize:(CGSize)size; // designated initialiser

To resolve that ambiguity, you can add an explicit cast:

font = [[(SemiSecretFont *)[klass alloc] initWithSize:size] autorelease];

Upvotes: 3

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