iPhone MapView中断 [英] iPhone MapView interrupted

问题描述

我有一个mapkit /视图，它工作正常 - 但我滚动，2 - 10移动我的应用程序崩溃...这只有一个中断。

这是我的代码的一部分。我认为这是一个问题的背景线程和数组释放/覆盖问题。

一些背景信息：我在mapview启动时生成一个会话键（MapKey），并在服务器上保存一个pin。 XML只包含用于更快响应和更短XML的新引脚。

  //当用户与其交互时更新地图
  - （void）mapView：（MKMapView *）aMapView regionDidChangeAnimated：（BOOL）animated 
 {
 MyAnnotation * annotation = [[MyAnnotation alloc] init]; 
 MyAnnotation * ann = [[MyAnnotation alloc] init]; 
 NSUserDefaults * prefs = [NSUserDefaults standardUserDefaults]; 
 [UIApplication sharedApplication] .networkActivityIndi​​catorVisible = YES; 
 NSString * postBody = [[[NSString alloc] initWithFormat：@single = 0& lat =％f& lng =％f& sid =％@，mapView.centerCoordinate.latitude，mapView.centerCoordinate.longitude， [prefs stringForKey：@MapKey]，[prefs stringForKey：@MapKey]] autorelease]; 
 [self performSelectorInBackground：@selector（getMark :) withObject：postBody]; 
} 
 //发布和与verarbeiten交互
  - （void）getMark：（NSString *）postBody 
 {
 NSAutoreleasePool * ccpool = [[NSAutoreleasePool alloc]在里面]; 
 NSString * urlStr = [[[NSString alloc] initWithFormat：@http：//URL/get.php] autorelease]; 
 NSMutableURLRequest * request; 
 NSData * postData = [postBody dataUsingEncoding：NSUTF8StringEncoding]; 
 NSError * error; 
 NSURLResponse * response; 
 NSData * dataReply; 
 id stringReply; 
 
 request = [NSMutableURLRequest requestWithURL：[NSURL URLWithString：urlStr]]; 
 
 [request setHTTPMethod：@POST]; 
 [request setHTTPBody：postData]; 
 [request setValue：@text / xmlforHTTPHeaderField：@Accept]; 
 
 dataReply = [NSURLConnection sendSynchronousRequest：request returningResponse：& response error：& error]; 
 stringReply =（NSString *）[[[NSString alloc] initWithData：dataReply encoding：NSUTF8StringEncoding] autorelease]; 
 [self performSelectorInBackground：@selector（verarbeiten :) withObject：stringReply]; 
 
 [ccpool release]; 
} 
 
 //生成带注释的annotations数组设置为mapview 
  - （void）verarbeiten：（NSString *）stringReply 
 {
 NSAutoreleasePool * bbpool = [[NSAutoreleasePool alloc] init]; 
 CXMLDocument * rssParser = [[[CXMLDocument alloc] initWithXMLString：stringReply options：0 error：nil] autorelease]; 
 NSMutableArray * annotations = [[NSMutableArray alloc] init]; 
 NSArray * resultNodes = nil; 
 resultNodes = nil; 
 resultNodes = [rssParser nodesForXPath：@// placeerror：nil]; 
 for（CXMLElement * resultElement in resultNodes）
 {
 MyAnnotation * ann = [[MyAnnotation alloc] init]; 
 ann.title = [[resultElement childAtIndex：3] stringValue]; 
 ann.subtitle = [[resultElement childAtIndex：5] stringValue]; 
 ann.currentPoint = [NSNumber numberWithInt：[[resultElement childAtIndex：1] stringValue] intValue]]; 
 MKCoordinateRegion region = {{0.0，0.0}，{0.0，0.0}}; 
 region.center.latitude = [[[resultElement childAtIndex：9] stringValue] floatValue]; 
 region.center.longitude = [[[resultElement childAtIndex：7] stringValue] floatValue]; 
 ann.coordinate = region.center; 
 // [mapView addAnnotation：ann]; 
 
 [annotations addObject：ann]; 
} 
 [mapView addAnnotations：annotations]; 
 [annotations release]; 
 [UIApplication sharedApplication] .networkActivityIndi​​catorVisible = NO; 
 [bbpool release]; 
} 
 
  - （MKAnnotationView *）mapView：（MKMapView *）mV viewForAnnotation：（MyAnnotation *）annotation 
 
 {
 MKPinAnnotationView * pinView = nil ; 
 if（annotation！= mapView.userLocation）
 {
 static NSString * defaultPinID = @de.my.pin; 
 pinView =（MKPinAnnotationView *）[mapView dequeueReusableAnnotationViewWithIdentifier：defaultPinID]; 
 if（pinView == nil）
 pinView = [[[MKPinAnnotationView alloc] initWithAnnotation：annotation reuseIdentifier：defaultPinID] autorelease]; 
 
 pinView.pinColor = MKPinAnnotationColorRed; 
 pinView.canShowCallout = YES; 
 pinView.animatesDrop = NO; 
 pinView.userInteractionEnabled = YES; 
 UIButton * btnVenue = [UIButton buttonWithType：UIButtonTypeDetailDisclosure]; 
 btnVenue.tag = [annotation.currentPoint intValue]; 
 [btnVenue addTarget：self action：@selector（showLinks :) forControlEvents：UIControlEventTouchUpInside]; 
 pinView.rightCalloutAccessoryView = btnVenue; 
} 
 else 
 {
 [mapView.userLocation setTitle：@You are here]; 
} 
 
 return pinView; 
} 
 
 
 
 #importMyAnnotation.h
 
 
 @implementation MyAnnotation 
 
 @ synthesize coordinate，title，subtitle，currentPoint; 
 
  - （void）dealloc 
 {
 [title release]; 
 [subtitle release]; 
 [super dealloc]; 
} 
 
 @end 
 
 
 
 #import< Foundation / Foundation.h> 
 #import< MapKit / MKAnnotation.h> 
 
 @interface MyAnnotation：NSObject< MKAnnotation> 
 {
 CLLocationCoordinate2D坐标; 
 NSString * title; 
 NSString * subtitle; 
 NSNumber * currentPoint; 
} 
 
 @property（nonatomic，assign）CLLocationCoordinate2D coordinate; 
 @property（nonatomic，copy）NSString * title; 
 @property（nonatomic，copy）NSString * subtitle; 
 @property（nonatomic，retain）NSNumber * currentPoint; 
 
 @end 
  

解决方案一个思想：因为 - [MKMapView addAnnotations：]（可能）执行UI修改，你可能想在主线程中调用它：

  [mapView performSelectorOnMainThread：@selector（addAnnotations :) withObject：annotations waitUntilDone：YES]; 
  

I have a mapkit / view and it works fine - but I scroll around and after 2 - 10 moves my app crashed... and this only with a "interrupted".

Here is part of my code. I think it's a problem with the background threads and an array release / override problem.

Some background info: I generate a "session" key (MapKey) on mapview startup and save on the serverside a pin. The XML includes only new pins for a faster response and shorter XML.

// Update map when the user interacts with it
- (void)mapView:(MKMapView *)aMapView regionDidChangeAnimated:(BOOL)animated
{
    MyAnnotation *annotation = [[MyAnnotation alloc] init];
    MyAnnotation *ann = [[MyAnnotation alloc] init];
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
    NSString *postBody = [[[NSString alloc] initWithFormat:@"single=0&lat=%f&lng=%f&sid=%@",  mapView.centerCoordinate.latitude, mapView.centerCoordinate.longitude, [prefs stringForKey:@"MapKey"], [prefs stringForKey:@"MapKey"]] autorelease];
    [self performSelectorInBackground:@selector(getMark:) withObject:postBody];
}
// make post and interact with verarbeiten
-(void) getMark:(NSString *)postBody 
{
    NSAutoreleasePool *ccpool = [[NSAutoreleasePool alloc] init];
    NSString *urlStr = [[[NSString alloc] initWithFormat:@"http://URL/get.php"] autorelease];
    NSMutableURLRequest *request;
    NSData *postData = [postBody dataUsingEncoding:NSUTF8StringEncoding];
    NSError *error;
    NSURLResponse *response;
    NSData *dataReply;
    id stringReply;

    request = [NSMutableURLRequest requestWithURL: [NSURL URLWithString:urlStr]];

    [request setHTTPMethod: @"POST"];
    [request setHTTPBody:postData];
    [request setValue:@"text/xml" forHTTPHeaderField:@"Accept"];

    dataReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    stringReply = (NSString *)[[[NSString alloc] initWithData:dataReply encoding:NSUTF8StringEncoding] autorelease];
    [self performSelectorInBackground:@selector(verarbeiten:) withObject:stringReply];

    [ccpool release];
}

//generate annotations array with annotations an set it to mapview
-(void) verarbeiten:(NSString *)stringReply 
{
    NSAutoreleasePool *bbpool = [[NSAutoreleasePool alloc] init];
    CXMLDocument *rssParser = [[[CXMLDocument alloc] initWithXMLString:stringReply options:0 error:nil] autorelease];
    NSMutableArray* annotations = [[NSMutableArray alloc] init];
    NSArray *resultNodes = nil;
    resultNodes = nil;
    resultNodes = [rssParser nodesForXPath:@"//place" error:nil];
    for (CXMLElement *resultElement in resultNodes) 
    {
        MyAnnotation *ann = [[MyAnnotation alloc] init];
        ann.title = [[resultElement childAtIndex:3] stringValue];
        ann.subtitle = [[resultElement childAtIndex:5] stringValue];
        ann.currentPoint = [NSNumber numberWithInt:[[[resultElement childAtIndex:1] stringValue] intValue]]; 
        MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } };
        region.center.latitude = [[[resultElement childAtIndex:9] stringValue] floatValue];
        region.center.longitude = [[[resultElement childAtIndex:7] stringValue] floatValue];
        ann.coordinate = region.center;
        //[mapView addAnnotation:ann ];

        [annotations addObject:ann];
    }
    [mapView addAnnotations:annotations ];
    [annotations release];
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
    [bbpool release];
}

- (MKAnnotationView *) mapView:(MKMapView *)mV viewForAnnotation:(MyAnnotation *) annotation 

{
    MKPinAnnotationView *pinView = nil;
    if(annotation != mapView.userLocation) 
    {
        static NSString *defaultPinID = @"de.my.pin";
        pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
        if ( pinView == nil )
            pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];

        pinView.pinColor = MKPinAnnotationColorRed;
        pinView.canShowCallout = YES;
        pinView.animatesDrop = NO;
        pinView.userInteractionEnabled = YES;
        UIButton *btnVenue = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        btnVenue.tag = [annotation.currentPoint intValue];
        [btnVenue addTarget:self action:@selector(showLinks:) forControlEvents:UIControlEventTouchUpInside];                                
        pinView.rightCalloutAccessoryView = btnVenue;
    }
    else
    {
        [mapView.userLocation setTitle:@"You are here"];
    }

    return pinView;
}



#import "MyAnnotation.h"


@implementation MyAnnotation

@synthesize coordinate, title, subtitle,currentPoint;

-(void)dealloc 
{
    [title release];
    [subtitle release];
    [super dealloc];
}

@end



#import <Foundation/Foundation.h>
#import <MapKit/MKAnnotation.h>

@interface MyAnnotation : NSObject <MKAnnotation> 
{
    CLLocationCoordinate2D coordinate;
    NSString *title;
    NSString *subtitle;
    NSNumber *currentPoint;
}

@property (nonatomic, assign) CLLocationCoordinate2D coordinate;
@property (nonatomic, copy) NSString *title;
@property (nonatomic, copy) NSString *subtitle;
@property(nonatomic, retain) NSNumber *currentPoint;

@end

解决方案

Just a thought: since -[MKMapView addAnnotations:] (potentially) performs UI modifications, you may want to call it in the main thread:

[mapView performSelectorOnMainThread: @selector(addAnnotations:) withObject: annotations waitUntilDone: YES];

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