Question

下面的代码是我到目前为止使用的代码，它正确地循环遍历数组中的每个对象，但是当我尝试将它们全部显示在一个地图上时，它只将数组中的最后一个obeject添加到地图中，不是所有20个左右我想要显示。

   self.clientTable = [ClientDatabase database].clientTable;

    ClientTable *info = nil;
    [_nameLabel setText:info.name];
    [_stateLabel setText:info.state];

    //change the string to doubles for the map GPS co-ordinates
    double latDouble = [info.latMap doubleValue];
    double longDouble = [info.longMap doubleValue];

    NSLog(@"%d",[self.clientTable count]);

    int countArray = [self.clientTable count];

    for (int i=0;i<countArray;i++) {

        info = [self.clientTable objectAtIndex:i];
        info.uniqueId=i;
        NSLog(@" i = %d ; id = %d %@",i, info.uniqueId, info.name);

        //set up the map
        [super viewDidLoad];
        [mapView setMapType:MKMapTypeStandard];
        [mapView setZoomEnabled:YES];
        [mapView setScrollEnabled:YES];
        MKCoordinateRegion region = {{0.0,0.0},{0.0,0.0}}; 

        region.center.latitude = latDouble;
        region.center.longitude = longDouble;
        region.span.longitudeDelta =0.02;  //degrees of acuracy, most precise best for this time
        region.span.latitudeDelta =0.02;   //degrees of accuracy

        [mapView setRegion:region animated:YES]; 

        // set up the annotation point

        AllMap *annotationPoint = [[AllMap alloc] init]; 
        annotationPoint.title = info.name;
        annotationPoint.subtitle = info.state; 
        annotationPoint.coordinate = region.center; 
        [mapView addAnnotation:annotationPoint];
        annotationPoint.isAccessibilityElement=YES;
        //show annotation by default
        [mapView selectAnnotation:annotationPoint animated:YES];  

        [mapView setDelegate:self];

    }

对不起，如果代码是垃圾，我是iPhone编程的新手。

提前致谢：D

Answer 1

看起来你正在[super viewDidLoad]循环中调用for，这可能会重置mapView的注释数组。此方法只应调用一次，因此如果您在for语句之前移动它，则可能会获得更好的结果。

Answer 2

为什么要在创建注释的循环内部设置地图？

这是一篇旧的博客文章，但它涵盖了基础知识，应该让你回到正轨

如何在基于数组的mapview上添加多个注释

2 个答案: