I try to store some Map Informations into a NSMutableArray but it is not working. I think there is only a minor problem that I couldn't find.
At .h File:
@property (retain, nonatomic) NSMutableArray *annotationArray;
at .m File:
MapPoint *placeObject = [[MapPoint alloc] initWithName:title subtitle:subtitle coordinate:loc];
[annotationArray addObject:placeObject];
NSLog(@" count: %lu", (unsigned long)[annotationArray count]); // always "0"
what did I wrong?
It seems that you may have forgotten to initialise the array. Try to add the following line before trying to add an object to it:
[self setAnnotationArray:[[NSMutableArray alloc] init]];
I would need to see more code, but I think it's most likely your not setting up annotationArray. Are you writing _annotationArray = [[NSMutableArray alloc] init] anywhere?
If not, the place for it is the class init method, or you could write in the function:
if (annotationArray == nil) {
_annotationArray = [[NSMutableArray alloc] init]
}
You could also use [self setAnnotationArray:[[NSMutableArray alloc] init]] instead of _annotationArray, but it depends on your synthesize statement.
I would suggest that you don't just initialize it in your function without checking if it's already been set first, because then you run the risk of overriding something else when your code gets more complex.
I think you missed this:
_annotationArray=[[NSMutableArray alloc]init];
at .m File: add after header
@synthesize annotationArray=_annotationArray;
- (void)loadView
{
self. annotationArray =[NSMutableArray array];
}
