Ey there, so as the title says, I am having a tough time adding an MKPolygon as an overlay to an MKMapView. Here is the relevant code:
ParkingMapViewContoller.h
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface ParkingMapViewController : UIViewController <MKMapViewDelegate> {
MKMapView *mapView;
}
#property (nonatomic, retain) IBOutlet MKMapView *mapView;
-(void)loadAnnotations;
-(void)showCurrentLocationButtonTapped:(id)sender;
#end
ParkingMapViewController.m
//...
#import "ParkingRegionOverlay.h"
//...
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(#"%#",self.title);
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:100 target:self action:#selector(showCurrentLocationButtonTapped:)];
/*MKMapPoint points[3] = {{38.53607,-121.765793}, {38.537606,-121.768379}, {38.53487,-121.770578}};
MKPolygon *polygon = [MKPolygon polygonWithPoints:points count:3];*/
ParkingRegionOverlay *polygon = [[ParkingRegionOverlay alloc] initialize];
[mapView addOverlay:polygon];
[self loadAnnotations];
CLLocationCoordinate2D centerCoord = { UCD_LATITUDE, UCD_LONGITUDE };
[mapView setCenterCoordinate:centerCoord zoomLevel:13 animated:NO]; //from "MKMapView+ZoomLevel.h"
}
//...
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
NSLog(#"in viewForOverlay!");
if ([overlay isKindOfClass:[MKPolygon class]])
{
MKPolygonView* aView = [[[MKPolygonView alloc] initWithPolygon:(MKPolygon*)overlay] autorelease];
aView.fillColor = [[UIColor cyanColor] colorWithAlphaComponent:0.2];
aView.strokeColor = [[UIColor blueColor] colorWithAlphaComponent:0.7];
aView.lineWidth = 3;
return aView;
}
return nil;
}
//...
ParkingRegionOverlay.h
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
#interface ParkingRegionOverlay : NSObject <MKOverlay> {
//CLLocationCoordinate2D origin;
MKPolygon *polygon;
//MKMapRect rect;
}
//#property (nonatomic) CLLocationCoordinate2D origin;
#property (nonatomic, retain) MKPolygon *polygon;
//#property (nonatomic) MKMapRect rect;
-(ParkingRegionOverlay*)initialize;
-(MKMapRect)boundingMapRect;
-(CLLocationCoordinate2D)coordinate;
#end
ParkingRegionOverlay.m
#import "ParkingRegionOverlay.h"
#implementation ParkingRegionOverlay
//#synthesize origin;
#synthesize polygon;
//#synthesize rect;
-(ParkingRegionOverlay*) initialize {
MKMapPoint points[3] = {{38.53607,-121.765793}, {38.537606,-121.768379}, {38.53487,-121.770578}};
polygon = [MKPolygon polygonWithPoints:points count:3];
polygon.title = #"Some Polygon";
return self;
}
- (MKMapRect)boundingMapRect{
MKMapRect bounds = MKMapRectMake(-121.770578,38.537606,-121.770578-(-121.765793),38.537606-38.53487);
return bounds;
}
- (CLLocationCoordinate2D)coordinate{
return CLLocationCoordinate2DMake((38.537606-38.53487)/2, (-121.770578-(-121.765793))/2);
}
#end
You see that NSLog I stuck in the viewForOverlay: method? Well that never shows up in the console, so that function is never called. Any idea of what's wrong? Many thanks!
The main issue is that the code is giving the map view latitude/longitude coordinates where it expects MKMapPoints. For an explanation of the difference, see "Understanding Map Geometry" in the Location Awareness Programming Guide. Use the MKMapPointForCoordinate function to convert from lat/long coordinates to an MKMapPoint.
The second issue is that in viewForOverlay, it is checking if overlay is of type MKPolygon. Your overlay class ParkingRegionOverlay contains an MKPolygon object inside it but is not itself of type MKPolygon.
To fix the main issue, you need to change the initialize and boundingMapRect methods:
-(id)init {
if (self = [super init]) {
MKMapPoint points[3];
CLLocationCoordinate2D c1 = {38.53607,-121.765793};
points[0] = MKMapPointForCoordinate(c1);
CLLocationCoordinate2D c2 = {38.537606,-121.768379};
points[1] = MKMapPointForCoordinate(c2);
CLLocationCoordinate2D c3 = {38.53487,-121.770578};
points[2] = MKMapPointForCoordinate(c3);
polygon = [MKPolygon polygonWithPoints:points count:3];
polygon.title = #"Some Polygon";
}
return self;
}
- (MKMapRect)boundingMapRect{
CLLocationCoordinate2D corner1 =
CLLocationCoordinate2DMake(38.537606, -121.770578);
MKMapPoint mp1 = MKMapPointForCoordinate(corner1);
CLLocationCoordinate2D corner2 =
CLLocationCoordinate2DMake(38.53487, -121.765793);
MKMapPoint mp2 = MKMapPointForCoordinate(corner2);
MKMapRect bounds =
MKMapRectMake(mp1.x, mp1.y, (mp2.x-mp1.x), (mp2.y-mp1.y));
return bounds;
}
Please notice by the way that I changed the method "initialize" to "init". Though it wasn't preventing the polygon from showing, the way you are overriding the initialization of ParkingRegionOverlay using a method called "initialize" and not calling [super init] does not follow convention. (Also remove "initialize" from the .h file.)
To fix the second issue, the viewForOverlay method should look like this:
- (MKOverlayView *)mapView:(MKMapView *)mapView
viewForOverlay:(id <MKOverlay>)overlay
{
NSLog(#"in viewForOverlay!");
if ([overlay isKindOfClass:[ParkingRegionOverlay class]])
//^^^^^^^^^^^^^^^^^^^^
{
//get the MKPolygon inside the ParkingRegionOverlay...
MKPolygon *proPolygon = ((ParkingRegionOverlay*)overlay).polygon;
MKPolygonView *aView = [[[MKPolygonView alloc]
initWithPolygon:proPolygon] autorelease];
//^^^^^^^^^^
aView.fillColor = [[UIColor cyanColor] colorWithAlphaComponent:0.2];
aView.strokeColor = [[UIColor blueColor] colorWithAlphaComponent:0.7];
aView.lineWidth = 3;
return aView;
}
return nil;
}
Finally, change the code in viewDidLoad:
ParkingRegionOverlay *polygon = [[ParkingRegionOverlay alloc] init];
[mapView addOverlay:polygon];
[polygon release]; //don't forget this
it seems to me that you forget to set your delegate
somthing like that
_mapView.delegate = self;
Have you set this?:
yourMap.delegate=self;
And what's your target? 3.x or 4.x?? I think MKPolygon is available from 4.0.
You can try to add the import clause to your prefix file like:
#ifdef __OBJC__
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#endif
Related
This is my implementation file :
#import "mapViewController.h"
#interface mapViewController ()
#end
#implementation mapViewController
#synthesize mapView,source,dest,latdest,latsource,longdest,longsource;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self)
{
dest=#"delhi";
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
CLGeocoder *geocoder1 = [[CLGeocoder alloc] init];
[geocoder1 geocodeAddressString:source
completionHandler:^(NSArray* placemarks, NSError* error)
{
for (CLPlacemark* aPlacemark in placemarks)
{
CLLocationCoordinate2D coordinate;
coordinate.latitude = aPlacemark.location.coordinate.latitude;
latsource=&coordinate.latitude;
coordinate.longitude = aPlacemark.location.coordinate.longitude;
longsource=&coordinate.longitude;
MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
[annotation setCoordinate:(coordinate)];
[annotation setTitle:source];
annotation.subtitle = #"I'm here!!!";
[self.mapView addAnnotation:annotation];
}
}];
}
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
MKCoordinateRegion region =MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800);
[self.mapView setRegion:[self.mapView regionThatFits:region] animated:YES];
MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
point.coordinate = userLocation.coordinate;
point.title = #"Where am I?";
point.subtitle = #"I'm here!!!";
[self.mapView addAnnotation:point];
[self.view addSubview:self.mapView];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
This is my header file :
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface mapViewController : UIViewController <MKMapViewDelegate>
#property (strong, nonatomic) IBOutlet MKMapView *mapView;
#property(strong,nonatomic) NSString *source,*dest;
#property(nonatomic) CLLocationDegrees *latsource,*longsource;
#property(nonatomic) CLLocationDegrees *latdest,*longdest;
#end
First i want to know why didUpdateUserLocation method is never called.I also want to know the code to add a destination whose coordinates are stored in latdest and longdest.Both of them will get their values from static variable "dest" which has the value "delhi" in it .My final aim is to trace a route on the map from source coordinates(latsource,longsource) to destination coordinates(latest,longdest).
I am new to ios development so i might have done some noob mistakes.
didUpdateUserLocation method won't be called if you not set mapView.delegate = self;
If you use a class, which has delegate methods, and you want to use them, everytime you should set its delegate = self
Don't use the same name as in delegates: mapView
in header:
#property (weak, nonatomic) IBOutlet MKMapView *myMapView;
be sure you connected the IBOutlet MKMapView *myMapView in IterfaceBuilder
in implementation file:
#synthesize myMapView;
in your - (void)viewDidLoad
myMapView.delegate = self;
you have to correct all self.mapView to myMapView
You made a really big mistake:
if you use IBOutlet you have to add on InterfaceBuilder , and connect it.
or you can create everything from code:
#property (weak, nonatomic) MKMapView *myMapView;
myMapView = [[MKMapView alloc] initWithFrame:CGRectMake(0,0,320,480)];
then add the screen with
[self.view addSubview:myMapView];
I am using following code to make custom AnnotationView.
My CustomPointAnnotation is a subclass of MKPointAnnotation with a setter/getter of Player
-(void) showMarkers
{
[self.mapView removeAnnotations:[self.mapView annotations]];
for (int i = 0 ; i < [self.playersArray count]; i ++)
{
Players *player = [self.playersArray objectAtIndex:i];
CustomPointAnnotation *annotationPoint = [[CustomPointAnnotation alloc] init];
[annotationPoint setPlayer:player];
if ([player.name isEqualToString:self.name.text])
{
NSLog(#"%# , %#" , player.name,self.name.text);
annotationPoint.coordinate = CLLocationCoordinate2DMake([player.latitude doubleValue]+.1, [player.longitude doubleValue]+.1);
[self.mapView addAnnotation:annotationPoint];
}
else
{
NSLog(#"%# , %#" , player.name,self.name.text);
annotationPoint.coordinate = CLLocationCoordinate2DMake([player.latitude doubleValue], [player.longitude doubleValue]);
[self.mapView addAnnotation:annotationPoint];
}
}
[self.mapView setUserInteractionEnabled:YES];
}
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
// self.mapView.centerCoordinate = userLocation.location.coordinate;
myLocation = userLocation;
}
-(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
if ([[annotation title] isEqualToString:#"Current Location"] )
{
return nil;
}
CustomAnnotationView *annView = [[CustomAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"players"];
CustomPointAnnotation *ptAnnotation = (CustomPointAnnotation *) annotation;
[annView setPlayer:ptAnnotation.player];
annView.image = [UIImage imageNamed:#"marker.png"];
annView.enabled = YES;
[annView setUserInteractionEnabled:YES];
return annView;
}
The problem comes at [annView setPlayer:ptAnnotation.player]; Unrecognized selector sent to instance
I am adding CustomPointAnnotation so it should convert it back. How can i solve this issue
OK, Im not sure how you declared the custom class, but it goes like this:
.h:
#interface CustomPointAnnotation: NSObject <MKAnnotation> {
}
#property (nonatomic) CLLocationCoordinate coordinate;
// Other properties like title, subtitle, etc.
.m
#implementation CustomPointAnnotation
#synthesize coordinate; // and other properties
#interface CustomPointAnnotation : NSObject <MKAnnotation>
{
Player *player;
}
#property(nonatomic,retain) Player *player;
#property (nonatomic) CLLocationCoordinate coordinate;
Do not subclass MKAnnotation istead confirm to MKAnnotation protocal.
#interface CustomAnnotationView : MKAnnotationView
{
}
no need to set the player. when you need to access the player object access it using the annotation in CustomAnnotationView.
CustomPointAnnotation *annotation=self.annotation;
annotation.player;
I cant seem to figure this out with loading a custom map overlay from a url. As you can see its load the weather overlay from a URL that adds it to the mapview but it doesnt seem to be working and I cant see why it isnt working. Any help is appreciated.
radarView.h
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface radarViewController : UIViewController <MKMapViewDelegate> {
MKMapView *mapview;
}
#property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
#property (nonatomic, readwrite) MKCoordinateRegion region;
#property (nonatomic, readonly) MKMapRect visibleRect;
#property (nonatomic, retain) IBOutlet MKMapView *mapview;
-(IBAction)setMap:(id)sender;
-(IBAction)goBack;
#end
radarView.m
#import "radarViewController.h"
#import "MapOverlay.h"
#import "MapOverlayView.h"
#implementation radarViewController
#synthesize mapview,coordinate,visibleRect,region;
- (void)viewDidLoad
{
[super viewDidLoad];
[mapview setDelegate:self];
[mapview setZoomEnabled:YES];
[mapview setScrollEnabled:YES];
[mapview setMapType:MKMapTypeSatellite];
NSURL *imageURL = [NSURL URLWithString: #"http://radar.weather.gov/ridge/Conus/RadarImg/latest_radaronly.gif"];
NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
//UIImage * image = [UIImage imageWithData:imageData];
MapOverlay *overlay = [[MapOverlay alloc] initWithImageData:imageData withLowerLeftCoordinate:CLLocationCoordinate2DMake(21.65253888888889, -129.314525) withUpperRightCoordinate:CLLocationCoordinate2DMake(50.406625, -65.60158888888888)];
[mapview addOverlay:overlay];
[mapview setVisibleMapRect:[overlay boundingMapRect]];
[overlay release];
visibleRect = [mapview mapRectThatFits:overlay.boundingMapRect];
mapview.visibleMapRect = visibleRect;
region = MKCoordinateRegionForMapRect(visibleRect);
region.center.latitude = 26.503292;
region.center.longitude = -82.032353;
region.span.longitudeDelta = 0.4f;
region.span.latitudeDelta = 0.4f;
[mapview regionThatFits:region];
[mapview setRegion:region animated:YES];
[mapview setClipsToBounds:true];
}
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay {
MapOverlay *mapOverlay = overlay;
MapOverlayView *mapOverlayView = [[[MapOverlayView alloc] initWithOverlay:mapOverlay] autorelease];
return mapOverlayView;
}
#end
MapOverlay.h and .m
#import <MapKit/MapKit.h>
#interface MapOverlay : NSObject <MKOverlay> {
MKMapRect boundingMapRect;
}
#property (nonatomic, retain) NSData *radarData;
- (id) initWithImageData: (NSData*) imageData withLowerLeftCoordinate:
(CLLocationCoordinate2D) lowerLeftCoordinate withUpperRightCoordinate:
(CLLocationCoordinate2D) upperRightCoordinate;
#end
#import "MapOverlay.h"
#implementation MapOverlay
#synthesize radarData,coordinate,boundingMapRect;
- (id) initWithImageData: (NSData*) imageData withLowerLeftCoordinate: (CLLocationCoordinate2D) lowerLeftCoordinate withUpperRightCoordinate: (CLLocationCoordinate2D) upperRightCoordinate{
self.radarData = imageData;
MKMapPoint lowerLeft = MKMapPointForCoordinate(lowerLeftCoordinate);
MKMapPoint upperRight = MKMapPointForCoordinate(upperRightCoordinate);
boundingMapRect = MKMapRectMake(lowerLeft.x, upperRight.y, upperRight.x - lowerLeft.x, upperRight.y - lowerLeft.y);
return self;
}
- (CLLocationCoordinate2D)coordinate
{
return MKCoordinateForMapPoint(MKMapPointMake(MKMapRectGetMidX(boundingMapRect),
MKMapRectGetMidY(boundingMapRect)));
}
- (MKMapRect)boundingMapRect
{
return boundingMapRect;
}
#end
MapOverlayView.h and .m
#import <MapKit/MapKit.h>
#interface MapOverlayView : MKOverlayView {
CGFloat tileAlpha;
}
#property (nonatomic, assign) CGFloat tileAlpha;
#end
#import "MapOverlayView.h"
#import "MapOverlay.h"
#implementation MapOverlayView
#synthesize tileAlpha;
- (id)initWithOverlay:(id <MKOverlay>)overlay
{
if (self = [super initWithOverlay:overlay]) {
self.tileAlpha = 0.8;
}
return self;
}
- (void)drawMapRect:(MKMapRect)mapRect
zoomScale:(MKZoomScale)zoomScale
inContext:(CGContextRef)context
{
MapOverlay *mapOverlay = (MapOverlay *)self.overlay;
CGContextSetAlpha(context, tileAlpha);
UIImage *image = [[UIImage alloc] initWithData:mapOverlay.radarData];
NSString *strData = [[NSString alloc]initWithData:mapOverlay.radarData encoding:NSUTF8StringEncoding];
NSLog(#"%#",strData);
MKMapRect theMapRect = [self.overlay boundingMapRect];
CGRect theRect = [self rectForMapRect:theMapRect];
UIGraphicsPushContext(context);
[image drawInRect:theRect blendMode:kCGBlendModeNormal alpha:1.0];
UIGraphicsPopContext();
[image release];
}
- (BOOL)canDrawMapRect:(MKMapRect)mapRect
zoomScale:(MKZoomScale)zoomScale
{
return YES;
}
#end
I am making an app that will use the MKMapKit for the pins and annotations. I want to display more information besides some text, so I created a button in the callout so I could make that go to another view controller. At the moment, the button in the callout doesn't do anything, as there is no code to make it work. It would be great if someone could make the code for the button to go to a different view controller!
The header file
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
#define METERS_PER_MILE 1609.344
#interface MSKSecondViewController :UIViewController<MKMapViewDelegate>
{
IBOutlet MKMapView *stillwellMapView;
int difficultyOfTrailOverlay;
}
#property (nonatomic, assign) CLLocationCoordinate2D mainEntranceToStillwellCoordinate;
#end
Here is the implementation file
#import "MSKSecondViewController.h"
#interface MSKSecondViewController ()
#end
#implementation MSKSecondViewController
#synthesize mainEntranceToStillwellCoordinate;
- (void)viewDidLoad
{
[super viewDidLoad];
stillwellMapView.delegate=self;
// Do any additional setup after loading the view, typically from a nib.
[self mainEntrancetoStillwellCoordinate];
[self bambooForestCoordinate];
}
- (void)mainEntrancetoStillwellCoordinate
{
MKPointAnnotation * main = [[MKPointAnnotation alloc]init];
CLLocationCoordinate2D mainLocation;
mainLocation.latitude = 40.831685;
mainLocation.longitude = -73.477453;
[main setCoordinate:mainLocation];
[main setTitle:#"Entrance"];
[main setSubtitle:#"Main"];
[stillwellMapView addAnnotation:main];
}
- (void)bambooForestCoordinate
{
MKPointAnnotation * bambooForest = [[MKPointAnnotation alloc]init];
CLLocationCoordinate2D bambooForestLocation;
bambooForestLocation.latitude = 40.829118;
bambooForestLocation.longitude = -73.466443;
[bambooForest setCoordinate:bambooForestLocation];
[bambooForest setTitle:#"Bamboo Forest"];
[bambooForest setSubtitle:#"Exit to Woodbury"];
[stillwellMapView addAnnotation:bambooForest];
}
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation
(id<MKAnnotation>)annotation
{
MKPinAnnotationView * annView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:nil];
UIButton *moreInformationButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[moreInformationButton addTarget:self action:#selector(moreInformationButtonPressed:)
forControlEvents:UIControlEventTouchUpInside];
annView.rightCalloutAccessoryView = moreInformationButton;
moreInformationButton.frame = CGRectMake(0, 0, 23, 23);
moreInformationButton.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
moreInformationButton.contentHorizontalAlignment =
UIControlContentHorizontalAlignmentCenter;
annView.pinColor =MKPinAnnotationColorGreen;
annView.animatesDrop = true;
annView.canShowCallout = TRUE;
return annView;
}
I'm not sure if this is what I need to add, and what needs to go inside here
-(void) moreInformationButtonPressed:(UIButton *)sender
{
}
Write below kind of code:
-(void) moreInformationButtonPressed:(UIButton *)sender
{
OtherViewController *controller = [[OtherViewController alloc]initWithNibName:#"OtherViewController" bundle:nil];
[self.navigationController pushViewController:controller animated:YES];
[controller release];
}
first you should make a tag that you can know which annotation is clicked
moreInformationButton.tag = someIndex;
then do the action you want
-(void) moreInformationButtonPressed:(UIButton *)sender
{
int index = sender.tag;
YourController *yc =[[[YourController alloc] initWithIndex:index] autorelease];
[self.navigationController pushViewController:scanView animated:YES];
}
I am using an NSMutableArray defined in a CCLayer subclass as follows:
//
// GameOverScene.h
// Cocos2DSimpleGame
//
// Created by Ray Wenderlich on 2/10/10.
// Copyright 2010 Ray Wenderlich. All rights reserved.
//
#import "cocos2d.h"
#interface scoLayer : CCColorLayer {
CCLabelTTF *_label;
CCLabelTTF *_howtoplay;
NSMutableArray *highscores;
}
#property (nonatomic, retain) CCLabelTTF *label;
#property (nonatomic, retain) NSMutableArray *highscores;
#property (nonatomic, retain) CCLabelTTF *back;
+ (id)initWithScore:(int)lastScore;
+(void)print_label:(int)lb;
+(void)menu;
#end
#interface sco : CCScene {
scoLayer *_layer;
}
#property (nonatomic, retain) scoLayer *layer;
#end
Here is the .m file for the class:
#implementation sco
#synthesize layer = _layer;
- (id)init {
if ((self = [super init])) {
self.layer = [scoLayer node];
[self addChild:_layer];
}
return self;
}
- (void)dealloc {
[_layer release];
_layer = nil;
[super dealloc];
}
#end
#implementation scoLayer
#synthesize label = _label;
#synthesize highscores ;
//#synthesize how_to_play ;
#synthesize back;
-(id) init
{
if( (self=[super initWithColor:ccc4(255,255,255,255)] )) {
CGSize winSize = [[CCDirector sharedDirector] winSize];
self.label = [CCLabelTTF labelWithString:#"" fontName:#"Arial" fontSize:16];
//self.how_to_play = [CCLabelTTF labelWithString:#"" fontName:#"Arial" fontSize:32];
self.highscores = [[NSMutableArray alloc] initWithObjects:nil ];
// [highscores addObject:#"asdf"];
// NSLog(#"hig %#", [highscores objectAtIndex:0]);
_label.color = ccc3(0,0,0);
_label.position = ccp(winSize.width/2, winSize.height/2);
[self addChild:_label z:100];
[self runAction:[CCSequence actions:
[CCDelayTime actionWithDuration:3],
[CCCallFunc actionWithTarget:self selector:#selector(gameOverDone)],
nil]];
CCSprite *bk1 =[CCSprite spriteWithFile:#"bg3.png" ];//rect: CGRectMake(0, 0, 40, 480)];
[bk1 setPosition:ccp(160, 239)];
[self addChild:bk1 z:0];
CCMenuItem *back = [CCMenuItemImage
itemFromNormalImage:#"gameBackButton.png" selectedImage:#"gameBackButton.png"
target:self selector:#selector(back_game:)];
CCMenu *menu1 = [CCMenu menuWithItems:back,nil];
menu1.position = ccp(70, 100);
[menu1 alignItemsVerticallyWithPadding: 40.0f];
// [self addChild:menu z: 2];
[self addChild:menu1 z: 0];
}
return self;
}
In this function:
+(id)initWithScore:(int)lastScore
{
NSLog(#"score %d", lastScore);
//NSMutableArray *highscores = [[NSMutableArray alloc] initWithObjects:nil ];
//[highscores addObject:#"asdf"];
if([highscores count] == 0)
}
I want to use the highscores array and insert the data (lastScore), but when I do this the application exits with an EXC_BAD_ACCESS signal. How can I fix this error?
The + before the method declaration indicates, that this is a class method. So you have no access to instance variables.
I think this is more what you want:
-(id)initWithScore:(int)lastScore
{
NSLog(#"score %d", lastScore);
if(!self = [super init])
return nil;
highscores = [[NSMutableArray alloc] init];
[highscores addObject:lastScore];
return self;
}
You're on the right track, but unless you have many different highscore tables you don't need to make it a separate class, as you've tried to do now. (I.e. 'create many highscore table instances with a class'.) You can of course use a class and create an object of class highscoretable at [[alloc] init] (as yan kun shows), but if all you need is a mutable array to add highscores to in your game, just allocate one in the app delegate, or use other methods for variables shared between viewcontrollers, I think.