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up vote 1 down vote favorite

I am just getting into Obj C, and I am looking to create an array of MKAnnotations.

I have already created the MKAnnotation class called TruckLocation that contains the name, description, latitude, and longitude.

Here is what I have so far for the array:

NSMutableArray* trucksArray =[NSMutableArray arrayWithObjects: @[<#objects, ...#>]  nil];
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5 Answers

up vote 3 down vote accepted

Yore trying to combine 2 different syntaxes for similar but different things. You also don't seem to have any instances of your annotations.

Create some instances

TruckLocation *a1 = ...;
TruckLocation *a2 = ...;

Then we can add them

NSMutableArray* trucksArray = [NSMutableArray arrayWithObjects:a1, a2, nil];

Or

NSMutableArray* trucksArray = [@[a1, a2] mutableCopy]

This is a shorter and more modern form but you need to make it mutable as it will create an immutable instance.

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up vote 2 down vote

Well

NSString *a = @"a";
NSMutableArray *array = [NSMutableArray arrayWithObjects:a,nil];
// or
NSMutableArray *array = [NSMutableArray alloc]init];
[array addObject:a];
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up vote 0 down vote 
NSMutableArray *array = [NSMutableArray alloc] init];
[array addObject:myObject];

Where myObject is the object of your custom class.

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up vote 0 down vote

Suppose you initialize the objects and assign values the following way:

TruckLocation *truckLocationOne = [[TruckLocation alloc]initWithAnnotation:annotation
           reuseIdentifier:annotationIdentifier];
truckLocationOne.name = @"name";

TruckLocation *truckLocationTwo = [[TruckLocation alloc]initWithAnnotation:annotation
           reuseIdentifier:annotationIdentifier];
truckLocationTwo.name = @"name";

These objects would be added to the array temp in the following way:

1) NSMutableArray temp = [[NSMtableArray alloc]initWithObjects:truckLocationOne,truckLocationTwo,nil];

2) NSMutableArray temp = [[NSMtableArray alloc]init]; [temp addObject:truckLocationOne]; [temp addObject:truckLocationTwo];

Hope this answers your query

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up vote 0 down vote

Try something lke this 

  NSMutableArray *annotationArray=[[NSMutableArray alloc]init];

        CLLocationCoordinate2D shopPosition = CLLocationCoordinate2DMake(allShopInfoObject.shopLatitudeValue, allShopInfoObject.shopLongitudeValue);

    MapAnnotation *mapAnnotation = [[MapAnnotation alloc] initWithCoordinates:shopPosition andTitle:allShopInfoObject.shopName andShopId:allShopInfoObject.shopId subTitle:@""];

        [annotationArray addObject:mapAnnotation];
[self.mapView addAnnotations:annotationArray];
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