MapView加载后从XML加载注释

Question

有没有办法先加载MapView然后用注释填充它？

我之所以问：当我点击我的地图，首先调用我的XML填补了注解，有一个延迟和最后才观与我MapView开放。

我的担忧是，如果XML增长，它会延迟甚至进一步或超时。

Answer 1

看到这个代码：在方法，它负载注释使用XML.this会先和一些延迟将开始添加注释后做负载的MapView

#import "MapViewController.h" 
#import "MapViewAnnotation.h" 

@implementation MapViewController 

@synthesize mapView; 

// When the view loads 
- (void)viewDidLoad 
{ 

    [self performSelector:@selector(addAnnotation) withObject:@"" afterDelay:5.0]; 
} 

//here i am delaying my annotation to 5 second so my map can first display 

-(void)addAnnotation 
{ 
    // Set some coordinates for our position (Buckingham Palace!) 
    CLLocationCoordinate2D location; 
    location.latitude = (double) 51.501468; 
    location.longitude = (double) -0.141596; 

    // Add the annotation to our map view 
    MapViewAnnotation *newAnnotation = [[MapViewAnnotation alloc] initWithTitle:@"Buckingham Palace" andCoordinate:location]; 
    [self.mapView addAnnotation:newAnnotation]; 
    [newAnnotation release]; 
} 

// When a map annotation point is added, zoom to it (1500 range) 
- (void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views 
{ 
    MKAnnotationView *annotationView = [views objectAtIndex:0]; 
    id <MKAnnotation> mp = [annotationView annotation]; 
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance([mp coordinate], 1500, 1500); 
    [mv setRegion:region animated:YES]; 
    [mv selectAnnotation:mp animated:YES]; 
} 

// Received memory warning 
- (void)didReceiveMemoryWarning { 
    [super didReceiveMemoryWarning]; 
} 

// If the view unloads, release the map view 
- (void)viewDidUnload { 
    [super viewDidUnload]; 
    [mapView release]; 
    mapView = nil; 
} 

// Deallocations 
- (void)dealloc { 
    [mapView release]; 
    [super dealloc]; 
} 

@end