Question

这是我第一次使用plist。我一直在浏览，我找不到任何其他帮助。

我的viewDidLoad中有以下代码。为什么我的注释没有显示？

    mapView.showsUserLocation = YES;
mapView.delegate=self;


NSMutableArray *annotations = [[NSMutableArray alloc]init];
NSString *path = [[NSBundle mainBundle] pathForResource:@"StationAddress" ofType:@"plist"];
NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path];
NSArray *anns = [dict objectForKey:@"GasStation"];
NSLog(@" MapView is %@",mapView);
NSLog(@"anns is: %@", anns);


for(int i = 0; i < [anns count]; i++) {
    NSLog(@"read2");

    double realLatitude = [[[anns objectAtIndex:i] objectForKey:@"Latitude"] doubleValue];
    NSLog(@" double lat value is %f",realLatitude);
    double realLongitude = [[[anns objectAtIndex:i] objectForKey:@"Longitude"] doubleValue];
    NSLog(@" double lot value is %f",realLatitude);

    NSLog(@"read3");



    MyAnnotation *myAnnotation = [[MyAnnotation alloc] init];
    CLLocationCoordinate2D theCoordinate;
    theCoordinate.latitude = realLatitude;
    theCoordinate.longitude = realLongitude;
    myAnnotation.coordinate=CLLocationCoordinate2DMake(realLatitude,realLongitude);

    myAnnotation.title = [[anns objectAtIndex:i] objectForKey:@"Name"];
    myAnnotation.subtitle = [[anns objectAtIndex:i] objectForKey:@"Address"];


    [mapView addAnnotation:myAnnotation];
    [annotations addObject:myAnnotation];
    [myAnnotation release];

编辑MyAnnotation.h

@interface MyAnnotation : NSObject<MKAnnotation> {

CLLocationCoordinate2D  coordinate;
NSString*               title;
NSString*               subtitle;

}

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

MyAnnotation.m

@implementation MyAnnotation

@synthesize title;
@synthesize subtitle;
@synthesize coordinate;

注释的硬代码，（这是在viewdidload中）

[mapView setShowsUserLocation:YES];

CLLocation *userLoc = mapView.userLocation.location;
CLLocationCoordinate2D userCoordinate = userLoc.coordinate;


NSLog(@"user latitude = %f",userCoordinate.latitude);
NSLog(@"user longitude = %f",userCoordinate.longitude);

mapView.delegate=self;

NSMutableArray* annotations=[[NSMutableArray alloc] init];

MKPointAnnotation *annot1 = [[MKPointAnnotation alloc] init]; 
annot1.title = @"TItle1"; 
annot1.subtitle=@"Address of title"; 
annot1.coordinate = CLLocationCoordinate2DMake(21.946114, 120.792778); 
[mapView addAnnotation:annot1];

我为其中的3000人做了这个，但他们跑得很慢，所以我想找到一个更好的方法

Answer 1

试试这个。

变化：

     float realLatitude = [[[anns objectAtIndex:i] objectForKey:@"Latitude"] floatValue];

对此：

     double realLatitude = [[[anns objectAtIndex:i] objectForKey:@"Latitude"] doubleValue];
     NSLog(@" double lat value is %f",realLatitude);

（经度也是如此）。

同时提示：检查您在赤道几内亚西南部的大西洋南部的注释 - 这是{0,0}的Lat / Lon的位置，如果您的数据未正确转换，那么您的注释可能会在哪里是

从plist加载的注释未显示

1 个答案: