Question

Still new to Objective C, and I’m having some trouble that I just can’t seem to figure out on my own. The error occurs twice for each of the first three @properties below, and is: error: ‘syntax error before ‘)’ token’.

#import <Foundation/Foundation.h>      @interface PolygonShape : NSObject {     int *numberOfSides;     int *minimumNumberOfSides;     int *maximumNumberOfSides; }  @property (setter = setNumberOfSides) int *numberOfSides; @property (setter = setMin) int *minimumNumberOfSides; @property (setter = setMax) int *maximumNumberOfSides; @property (readonly, getter = angleInDegrees) float *angleInDegrees; @property (readonly, getter = angleInRadians) float *angleInRadians; @property (readonly, getter = name) NSString *name;  - (id) init; - (id) initWithSides: (int*) sides  min: (int*) min  max: (int*) max; - (void) dealloc; - (BOOL) setNumberOfSides: (int*) num; - (void) setMin: (int*) num; - (void) setMax: (int*) num; - (void) description; - (float*) angleInDegrees; - (float*) angleInRadians; - (NSString*) name;  @end 

Not sure if this would make a difference, but here is a summarized version of the implementation:

#import 'PolygonShape.h';  @implementation PolygonShape  @synthesize numberOfSides; @synthesize minimumNumberOfSides; @synthesize maximumNumberOfSides;  ...  - (BOOL) setNumberOfSides: (int*) num {     if(num > minimumNumberOfSides && num < maximumNumberOfSides) {         [numberOfSides release];         numberOfSides = [num retain];         return YES;     } else {         NSLog(@'Number %i is out of range %i to %i', num, minimumNumberOfSides, maximumNumberOfSides);         return NO;     } }  - (BOOL) setMin: (int*) num {     if(num > 2 && num <= maximumNumberOfSides) {         [minimumNumberOfSides release];         minimumNumberOfSides = [num retain];         return YES;     } elseif (num > 2 && maximumNumberOfSides == nil) {         [minimumNumberOfSides release];         [self setMax: 12];         minimumNumberOfSides = [num retain];         return YES;     } elseif (num > 2) {         NSLog(@'Polygons must have more than 2 sides.');         return NO;     } else {         NSLog(@'Please enter a number less than or equal to %i, the current maximum', maximumNumberOfSides);         return NO;     } }  - (void) setMax: (int*) num {     if(num <= 12 && num < maximumNumberOfSides) {         [maximumNumberOfSides release];         maximumNumberOfSides = [num retain];     } elseif (num <= 12) {         NSLog(@'Please enter a number less than or equal to 12');     } else {         NSLog(@'Please enter a number greater than or equal to %i, the current minimum', minimumNumberOfSides);     } }  ...  @end 

Thanks in advance for your help!

Answer 1

You’re using the wrong selectors on your setter properties. The full selector name includes the colon at the end: setNumberOfSides:

They should look like this:

@interface Foo @property (readwrite, setter = setNumberOfSides:) int numberOfSides; @end 

One thing though, the names you’re specifying are the same as the automatically generated names so you don’t need to specify the setter attribute.