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對於iPad應用程序,我在SplitView上使用左側的TableView顯示餐廳列表。右側有一個MapView顯示這些餐館的註釋。在地圖視圖中突出顯示註釋
我想放大到一個註釋,並以某種方式突出顯示它,當用戶點擊左側表中的相關餐廳。
不幸的是我沒有得到地圖重新加載。
任何建議或想法如何解決這個問題?
這裏是我的viewDidLoad
- (void)viewDidLoad {
NSString *docsDir;
NSArray *dirPaths;
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: @"smshipaddec2011.db"]];
const char *dbpath = [databasePath UTF8String];
MapViewAnnotation *newAnnotation;
sqlite3_stmt *statement;
if (sqlite3_open(dbpath, &smshdb2) == SQLITE_OK) {
NSString *querySQL = [NSString stringWithFormat: @"SELECT vmapx, vmapy, vname, vsection FROM SMSHVENUES"];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(smshdb2, query_stmt, -1, &statement, NULL) == SQLITE_OK) {
while(sqlite3_step(statement) == SQLITE_ROW) {
double latitude = sqlite3_column_double(statement, 0);
double longitude = sqlite3_column_double(statement, 1);
CLLocationCoordinate2D location;
location.latitude = latitude;
location.longitude = longitude;
newAnnotation = [[MapViewAnnotation alloc] initWithTitle:[[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 2)] andCoordinate:location];
[mapView addAnnotation:newAnnotation];
[newAnnotation release];
}
sqlite3_finalize(statement);
}
sqlite3_close(smshdb2);
}
mapView.showsUserLocation = YES;
[mapView setMapType:MKMapTypeStandard];
[mapView setZoomEnabled:YES];
[mapView setScrollEnabled:YES];
CLLocation *userLoc = mapView.userLocation.location;
CLLocationCoordinate2D userCoordinate = userLoc.coordinate;
MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } };
//this is Shanghai:
region.center.latitude = 31.227849 ;
region.center.longitude = 121.473770;
region.span.longitudeDelta = 0.02f;
region.span.latitudeDelta = 0.02f;
[mapView setRegion:region animated:YES];
[super viewDidLoad];
}
現在,當有人點擊表格單元格「configureView」被觸發,工作正常。但後來我不知道如何移動地圖,放大到該註釋,也許改變顏色或使其變大。
- (void)configureView {
// animate map
// zoom to annotation
// make it bigger or change colour
}
真的很感謝任何幫助。
謝謝。這工作。 – user1104325