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thanks Nimesh, code. OfflineTiledLayer : AGSTiledLayer ... - (NSOperation<AGSTileOperation>*) retrieveImageAsyncForTile: (AGSTile *) tile{ [super.operationQueue setMaxConcurrentOperationCount:20]; NSLog(@"%d",[super.operationQueue operationCount]); //Create an operation to fetch tile from local cache OfflineTileOperation *operation = [[OfflineTileOperation alloc] initWithTile:tile dataFramePath:_dataFramePath target:self action:@selector(didFinishOperation: )]; //Add the operation to the queue for execution [self.operationQueue addOperation: operation]; return [operation autorelease]; } - (void) didFinishOperation: (NSOperation<AGSTileOperation>*)op { //If tile was found ... if (op.tile.image!=nil) { //... notify tileDelegate of success [self.tileDelegate tiledLayer:self operationDidGetTile: op]; NSLog(@"%d",op.tile.level); }else { //... notify tileDelegate of failure [self.tileDelegate tiledLayer:self operationDidFailToGetTile: op]; } } ... if op.tile.image==nil then the console will print out 2011-09-08 13:50:40.204 zjjt[2940:ca0b] Error happened for tile 0/4/0 this exception can be catched by arcgis ios api and throw out. now i'm Create a new MapView extend from AGSMapView, and Overwrite some touch Functions code. SDLinMapView : AGSMapView ... - (void) touchesBegan: (NSSet *)touches withEvent: (UIEvent *)event { [_tiledLyr.operationQueue cancelAllOperations]; [super touchesBegan:touches withEvent:event]; } - (void) touchesMoved: (NSSet *)touches withEvent: (UIEvent *)event { [_tiledLyr.operationQueue cancelAllOperations]; [super touchesMoved:touches withEvent:event]; } ... Until now�?has not been happened. but 😞 overmuch touchs will cause overmuch Calculates�??how to cancel the useless operations �?it Will affect the efficiency.
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09-07-2011
10:16 PM
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thanks Nimesh, AGS api version 2.0, ios 4.3 images from web: NSString* dir = [_allLayersPath stringByAppendingFormat:@"/%@/%@/%@.png",decLevel,hexRow,hexCol]; //NSLog(dir); _tile.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:dir]]]; it works well until the exception happen.
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09-06-2011
05:07 PM
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The tile map class fires off a bunch of operations to load the images in background threads. It's possible the rapid zoom in/out is overloading the operation threads. thanks rick.jones@moncton.org yes , it's always happen in rapid zoom in/out . is there any way can avoid the exception�?
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09-06-2011
06:28 AM
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An additional remark�? My app�?Custom Tiled Layer Sample�? can run�?my custom tiled layer can appear�?but when I zoom in and zoom out frequently�? This error occured ,and the app end unexpected,turned to the ipad's desktop.why this bug happen�?please help me.thanks.
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09-06-2011
02:17 AM
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2011-09-06 10:45:32.344 zjjt[1627:5f03] *** Terminating app due to uncaught exception 'NSGenericException', reason: '*** Collection <CALayerArray: 0xb226f50> was mutated while being enumerated.( "<CALayer: 0x6036f40>", "<CALayer: 0x603ab80>", "<CALayer: 0x60179d0>", "<CALayer: 0x602e030>", "<CALayer: 0x601a3a0>", "<CALayer: 0x6033f60>", "<CALayer: 0x603b660>", "<CALayer: 0xb22a550>", "<CALayer: 0x6017b50>", "<CALayer: 0x6228670>", "<CALayer: 0xb222340>", "<CALayer: 0x6039a20>", "<CALayer: 0x6040900>", "<CALayer: 0xb2223e0>", "<CALayer: 0x603cc00>", "<CALayer: 0x6036cf0>", "<CALayer: 0x6039540>", "<CALayer: 0x603b260>", "<CALayer: 0x6038b50>", "<CALayer: 0x6040430>" )' *** Call stack at first throw: ( 0 CoreFoundation 0x01b7a5a9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x01cce313 objc_exception_throw + 44 2 CoreFoundation 0x01b7a069 __NSFastEnumerationMutationHandler + 377 3 UIKit 0x00bfc75c -[UIView(Hierarchy) subviews] + 331 4 zjjt 0x0007a0ef -[AGSTiledLayerView mapZoomed:] + 546 5 zjjt 0x00079ec6 -[AGSTiledLayerView mapIsZooming:] + 116 6 zjjt 0x0006f67e -[AGSMapView kickOffMapIsZooming:] + 321 7 Foundation 0x0094294e __NSThreadPerformPerform + 251 8 CoreFoundation 0x01b5b8ff __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 9 CoreFoundation 0x01ab988b __CFRunLoopDoSources0 + 571 10 CoreFoundation 0x01ab8d86 __CFRunLoopRun + 470 11 CoreFoundation 0x01ab8840 CFRunLoopRunSpecific + 208 12 CoreFoundation 0x01ab8761 CFRunLoopRunInMode + 97 13 Foundation 0x00964115 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 295 14 zjjt 0x000625c0 -[WorkerThreadUnit workerThreadMainRoutine] + 166 15 Foundation 0x0092dcf4 -[NSThread main] + 81 16 Foundation 0x0092dc80 __NSThread__main__ + 1387 17 libSystem.B.dylib 0x98261819 _pthread_start + 345 18 libSystem.B.dylib 0x9826169e thread_start + 34 ) how??
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09-05-2011
07:27 PM
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