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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

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JoseMorales

Thanks Nimesh for your help, already see the map.

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

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.

webMap.zip

NimeshJarecha

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

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

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

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

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

Captura de pantalla 2011-12-20 a la(s) 21.04.54.png

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

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

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

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