Arcgis For Ios OC 版 在已有的图层上,修改图层的某一段颜色
AGSServiceFeatureTable *trailheadsTable = [[AGSServiceFeatureTable alloc] initWithURL:url];AGSFeatureLayer *trailheadsFeatureLayer = [[AGSFeatureLayer alloc] initWithFeatureTable:trailheadsTable];AGSSimpleLineSymbol *simbol = [[AGSSimpleLineSymbol alloc] initWithStyle:AGSSimpleLineSymbolStyleSolid color:[UIColor redColor] width:2];
trailheadsFeatureLayer.definitionExpression = @"line = '东线'";trailheadsFeatureLayer.renderer = [[AGSSimpleRenderer alloc] initWithSymbol:simbol];[self.map.operationalLayers addObject:trailheadsFeatureLayer];
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