I can't show a web map using AGSWebMap

[JoseMorales]

I am trying to show a online map using AGSWebMap but I don't know exactly how doing.

This is my code: ViewController.h

#import <UIKit/UIKit.h>
#import "ArcGis.h"

@interface ViewController : UIViewController 
@property (retain, nonatomic) IBOutlet AGSMapView *mapView;
    
@end

ViewController.m

#import "ViewController.h"

@implementation ViewController
@synthesize mapView;
.....

- (void) openIntoMapView: (AGSMapView*) mapView {
    AGSCredential* credential = [[[AGSCredential alloc] initWithUser:@"<my_user_name>" password:@"<My_passdword>"] autorelease];
    credential.authType = AGSAuthenticationTypeToken;
    AGSWebMap* webmap = [[AGSWebMap alloc] initWithItemId:@"e20f2f98b35c4963a5e124bf43c1d74a" credential:credential];
}

I received a message from Xcode "Unusued variable webmap" and the simulator show a white screen. Could anyone help me to solve this error? Thanks

[NimeshJarecha]

Just add a code line...

    AGSCredential* credential = [[[AGSCredential alloc] initWithUser:@"<my_user_name>" password:@"<My_passdword>"] autorelease];
    credential.authType = AGSAuthenticationTypeToken;
    AGSWebMap* webmap = [[AGSWebMap alloc] initWithItemId:@"e20f2f98b35c4963a5e124bf43c1d74a" credential:credential];
[webmap openIntoMapView:self.mapView]; //added

Regards,
Nimesh

[SobodhDangwal]

Just add a code line...

    AGSCredential* credential = [[[AGSCredential alloc] initWithUser:@"<my_user_name>" password:@"<My_passdword>"] autorelease];
    credential.authType = AGSAuthenticationTypeToken;
    AGSWebMap* webmap = [[AGSWebMap alloc] initWithItemId:@"e20f2f98b35c4963a5e124bf43c1d74a" credential:credential];
[webmap openIntoMapView:self.mapView]; //added

Regards,
Nimesh

Hi Nimesh

I am having the same problem and getting a white screen, even though I have added the above bit you suggested.

Here is my code

- (void) openIntoMapView: (AGSMapView*) mapView {
   
    AGSWebMap* webmap = [[AGSWebMap alloc] initWithItemId:@"3e7c311a0f2c49a1a5821411a22e3ac2" ];
[webmap openIntoMapView:self.mapView];
}

Its a public webmap so doesn't need any credentials. In my case it throws a warning as 'Method -initWithItemId not found' . I have included #import "ArcGIS.h" file properly.

Any help will be appreciated. Also it would be nice to have a sample created to display ArcGIS.com WebMap using iOS.

Cheers

[NimeshJarecha]

Okie..i know what's happening. You must retain webmap so the instance remain around until web map finish loading and then you can open into mapView. Here is the code you should try..

ViewController.h

#import <UIKit/UIKit.h>
#import "ArcGis.h"

@interface <Classname> : UIViewController <AGSWebMapDelegate>

@interface ViewController : UIViewController 
@property (retain, nonatomic) IBOutlet AGSMapView *mapView;
@property (retain, nonatomic) AGSWebmap *webmap;
    
@end

ViewController.m

- (void)viewDidLoad {
    AGSCredential* credential = [[[AGSCredential alloc] initWithUser:@"<my_user_name>" password:@"<My_passdword>"] autorelease];
    credential.authType = AGSAuthenticationTypeToken;
    self.webmap = [[AGSWebMap alloc] initWithItemId:@"e20f2f98b35c4963a5e124bf43c1d74a" credential:credential];
    self.webmap.delegate = self
}

#pragma mark AGSWebMapDelegate

- (void)webMapDidLoad:(AGSWebMap *)webMap {
 
 NSLog(@"delegate webMapDidLoad");
 
 //open webmap in mapview
 [self.webMap openIntoMapView:self.mapView];
}

-(void)didOpenWebMap:(AGSWebMap*)webMap intoMapView:(AGSMapView*)mapView {
 NSLog(@"delegate didOpenWebMap");
}

Even though, the web map is public you must use the complete method..

self.webmap = [[AGSWebMap alloc] initWithItemId:@"itemid" credential:nil];

Regards,
Nimesh

[JoseMorales]

I tried your code and the white screen appear newly. Xcode says that there is no error in the code.

ViewController.h

#import <UIKit/UIKit.h>
#import "ArcGis.h"

@interface ViewController : UIViewController <AGSWebMapDelegate>
@property (retain, nonatomic) IBOutlet AGSMapView *mapView;
@property (retain, nonatomic) AGSWebMap *webmap;

@end

ViewController.m

#import "ViewController.h"

@implementation ViewController
@synthesize mapView;
@synthesize webmap;


#pragma mark - 

- (void) openIntoMapView: (AGSMapView*) mapView {
    self.webmap = [[AGSWebMap alloc] initWithItemId:@"d802f08316e84c6592ef681c50178f17" credential:nil];
    self.webmap.delegate = self;
}
- (void)webMapDidLoad:(AGSWebMap *)webmap {
 
 NSLog(@"delegate webMapDidLoad");
 //open webmap in mapview
 [self.webmap openIntoMapView:self.mapView];
}

-(void)didOpenWebMap:(AGSWebMap*)webmap intoMapView:(AGSMapView*)mapView {
 NSLog(@"delegate didOpenWebMap");
}

- (void)dealloc {
    [mapView release];
    [super dealloc];
}
- (void)viewDidUnload {
    [self setMapView:nil];
    [super viewDidUnload];
}
@end

[NimeshJarecha]

Do you see anything printed on the debug window for following NSLog statements?

NSLog(@"delegate webMapDidLoad");
NSLog(@"delegate didOpenWebMap");

Regards,
Nimesh

[JoseMorales]

The console printed this information:

GNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Mon Aug  8 20:32:45 UTC 2011)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin".
sharedlibrary apply-load-rules all
Attaching to process 16588.
Couldn't register c.webMap with the bootstrap server. Error: unknown error code.
This generally means that another instance of this process was already running or is hung in the debugger.Current language:  auto; currently objective-c
(gdb) 

[NimeshJarecha]

Looks like something wrong with the simulator. Please restart your machine and then try...

Regards,
Nimesh

[JoseMorales]

After restart my computer this is de console message:

GNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Mon Aug  8 20:32:45 UTC 2011)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin".
sharedlibrary apply-load-rules all
Attaching to process 505.

... and the map follow without appear only a white screen. Any ideas???

I attach the project.

[NimeshJarecha]

The code written by you never executes. Because the first method which view executes is viewDidLoad and it's missing. 😞

Just change the code as below and it should work..

//- (void) openIntoMapView: (AGSMapView*) mapView {
- (void)viewDidLoad {
    self.webmap = [[AGSWebMap alloc] initWithItemId:@"d802f08316e84c6592ef681c50178f17" credential:nil];
    self.webmap.delegate = self;
}

Regards,
Nimesh