Common map development code

1. // update the visible area of the map so that all bus stops are in the visible area of the map.

-(Void) updatemapviewvisibleregion {

Mkmaprect zoomrect =
Mkmaprectnull;

For (ID <mkannotation> Annotation
In self. mapview. Annotations ){

Mkmappoint annotationpoint =
Mkmappointforcoordinate (annotation. Coordinate );

Mkmaprect pointrect =
Mkmaprectmake (annotationpoint. X, annotationpoint. y,
0, 0 );

If (mkmaprectisnull (zoomrect )){

Zoomrect = pointrect;

}
Else {

Zoomrect =
Mkmaprectunion (zoomrect, pointrect );

}

}

Zoomrect = [self. mapview
Maprectthatfits: zoomrect];

[Self. mapview
Setvisiblemaprect: zoomrect animated: Yes];

}

-(Mkannotationview *) mapview :( mkmapview *) mapview viewforannotation :( ID
<Mkannotation>) annotation {

// Determine whether it is its own location

If ([annotation iskindofclass: [mkuserlocation
Class]) {

Return nil;

}

// Verify Parameters

If (! [Annotation iskindofclass: [zpmkannotation
Class]) {

Return nil;

}

Static
Nsstring * stridentifier =
@ "Mapviewrouteannotationviewidentifier ";

Mkpinannotationview * pinview = (mkpinannotationview *) [mapview
Dequeuereusableannotationviewwithidentifier: stridentifier];

If (nil = pinview ){

Pinview = [[[mkpinannotationview
Alloc] initwithannotation: Annotation
Reuseidentifier: stridentifier]
Autorelease];

Pinview. Tag = (zpmkannotation *) annotation). stationid;

Pinview. pincolor =
Mkpinannotationcolorgreen;

Pinview. canshowcallout =
Yes;

Pinview. rightcalloutaccessoryview = [uibutton
Buttonwithtype: uibuttontypedetaildisclosure];

Pinview. draggable =
Yes;

} Else {

Pinview. annotation = annotation;

}

Return pinview;

}

2. draw lines on a map

// Update the visible area of the map so that all bus stops are in the visible area of the map.

-(Void) updatemapviewvisibleregion {

Mkmaprect zoomrect =
Mkmaprectnull;

For (ID <mkannotation> Annotation
In self. mapview. Annotations ){

Mkmappoint annotationpoint =
Mkmappointforcoordinate (annotation. Coordinate );

Mkmaprect pointrect =
Mkmaprectmake (annotationpoint. X, annotationpoint. y,
0, 0 );

If (mkmaprectisnull (zoomrect )){

Zoomrect = pointrect;

}
Else {

Zoomrect =
Mkmaprectunion (zoomrect, pointrect );

}

}

Zoomrect = [self. mapview
Maprectthatfits: zoomrect];

[Self. mapview
Setvisiblemaprect: zoomrect animated: Yes];

}

-(Mkoverlayview *) mapview :( mkmapview *) mapview viewforoverlay :( id <mkoverlay>) Overlay
{

If (overlay = self. routeline ){

Self. routelineview = [[mkpolylineview
Alloc] initwithpolyline: Self. routeline]
Autorelease];

Self. routelineview. fillcolor = [uicolor
Bluecolor];

Self. routelineview. strokecolor = [uicolor
Bluecolor];

Self. routelineview. linewidth =
5;

Return self. routelineview;

}

Return
Nil;

}