建立與設定面圖徵

面圖徵之建立與設定，包括：地圖上加入面圖徵、設定面圖徵之邊框寬度及顏色等，並可動態修改面之顏色及邊框寬度，設面線圖徵程式範例如下：

- (void)loadView

{

R = 50;

G = 50;

B = 50;

mapView_ = [[TGMapView alloc] initWithFrame:CGRectZero];

self.view = mapView_;

mapView_.viewer = [TGViewerPosition viewerWithLatitude:23.58 longitude:120.95 zoom:1];

TGPolygonOptions *options;

TGMutablePath *path;

options = [TGPolygonOptions options]; //建立TGPolygonOptions物件

path = [TGMutablePath path]; //建立TGMutablePath物件

options.strokeColor = [UIColor colorWithRed:1 green:0.2 blue:0.2 alpha:0.5];

//設定邊框的顏色

options.fillColor = [UIColor colorWithRed:R/100 green:G/100 blue:B/100 alpha:1 ];

//設定填色顏色

options.strokeWidth = 4.f; //設定邊框寬度，單位為Pixel

[path addCoordinate:CLLocationCoordinate2DMake(24.96, 121.22)];

//新增坐標點，坐標要用WGS84

[path addCoordinate:CLLocationCoordinate2DMake(24.49, 121.23)];

[path addCoordinate:CLLocationCoordinate2DMake(23.95, 120.95)];

[path addCoordinate:CLLocationCoordinate2DMake(24.572104,120.563049)];

options.path = path; //設定Polygon的path

Polygon = [mapView_ addPolygonWithOptions:options]; //將Polygon加入地圖

}