我在我的大項目中使用MKMapView。當我加載了很多註釋(超過700),並且我在MapKit上的這些點之間畫線時,出現xcode錯誤消息「由於內存錯誤而終止」,並且應用程序崩潰。 你可以看到圖像:如何解決由於內存錯誤而終止
。
我加入一行:
,如果我有小於700註解,它的工作非常好。我認爲它有一些內存問題。我怎樣才能解決這個問題?任何建議。
// adding annodation
for (int i=0; i<[fetcher.locations count]; i++)//fetcher.locations is NSMutableArray and inside have locationInfoClass objects . locationInfoClass is hold CLLocationCoordinate2D.
{
locationInfoClass * loc=[fetcher2.locations objectAtIndex:i];
CLLocationCoordinate2D coordinate1;
coordinate1.latitude = loc.lat;
coordinate1.longitude = loc.lon;
myAnnotation * ann = [[myAnnotation alloc] initWithCoordinate:annCoordinate title:@"uniqtitle" subtitle:@"uniqsubtitle"];
[mapView addAnnotation:ann];
}
#pragma mark -
#pragma mark -mapview overlay
CLLocationCoordinate2D *coordinates
= malloc(sizeof(CLLocationCoordinate2D) * [mapView.annotations count]);
for (int i=0; i<[mapView.annotations count]; i++) {
myAnnotation * ann=[mapView.annotations objectAtIndex:i];
coordinates[i]=ann.coordinate;
}
self.routeLine = [MKPolyline polylineWithCoordinates:coordinates count:mapView.annotations.count]; // pinlerin sayısı ne kadarsa o kadar çizgi çiziyor.
free(coordinates);
[self.mapView setVisibleMapRect:[self.routeLine boundingMapRect]]; //If you want the route to be visible
dispatch_async(dispatch_get_main_queue(), ^{
[self.mapView addOverlay:self.routeLine];
});
.h文件中有
@property (nonatomic, retain) MKPolyline *routeLine; //your line
@property (nonatomic, retain) MKPolylineView *routeLineView; //overlay view
的MKMapView委託方法。
-(MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id<MKOverlay>)overlay
{
if(overlay == self.routeLine)
{
if(nil == self.routeLineView)
{
self.routeLineView = [[MKPolylineView alloc] initWithPolyline:self.routeLine];
self.routeLineView.fillColor = [UIColor redColor];
self.routeLineView.strokeColor = [UIColor redColor];
self.routeLineView.lineWidth = 3;
}
return self.routeLineView;
}
return nil;
}
/*
- (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];
}*/
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKAnnotationView *pinView = nil;
if(annotation != mapView.userLocation)
{
static NSString *defaultPinID = @"ftffggf";
pinView = (MKAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if (pinView == nil)
pinView = [[MKAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:defaultPinID];
//pinView.pinColor = MKPinAnnotationColorGreen;
pinView.canShowCallout = YES;
//pinView.animatesDrop = YES;
UIImage * image=[UIImage imageNamed:@"pin.png"];
CGSize size=CGSizeMake(50, 63);//set the width and height
pinView.image = image
}
else {
[self.mapView.userLocation setTitle:@"I am here"];
}
pinView.centerOffset = CGPointMake(0,-23);
return pinView;
}
這就是整個消息嗎?沒有回溯或例外? – nielsbot
是的消息只是這個。應用程序正在等待30秒添加註釋並添加重疊。突然顯示此消息。 –
在樂器下運行您的應用程序並觀看內存增長。如果這是與另一個問題相同的應用程序,而您的問題超過90個,那很可能是問題所在。 – bbum