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Arcgis For Ios OC 版 在已有的图层上,修改图层的某一段颜色// 主要方法 修改Layer的renderAGSServiceFeatureTable *trailheadsTable = [[AGSServiceFeatureTable alloc] initWithURL:url]; AGSFeatureLayer *trailheadsFeatureLayer = [[AGSFeatureLayer alloc] initWithFeatureTable:trailhea