创建CLLocationCoordinates数组

问题描述

我正在尝试获取我存储在parse.com中的纬度和经度双值数组。我希望能够将这些转换回CLLocationCoordinates，然后我可以使用它在自定义表视图中创建MKPloylines。
但是我不太确定如何存储一系列CLLocationCoordinates。
这是我的代码：

I'm attempting to get an array of latitude and longitude double values which I have stored in parse.com. I want to be able to convert these back into CLLocationCoordinates which I can then use to create MKPloylines in a custom table view. However I'm not too sure how I can store an array of CLLocationCoordinates. Here is my code:

        _latitudeArray = [object objectForKey:@"latitude"];
        [_parseLatitudeArray addObject:_latitudeArray];

        _longitudeArray = [object objectForKey:@"longitude"];
        [_parseLongitudeArray addObject:_longitudeArray];

        for (int i=0; i < [_parseLatitudeArray count]; i++) {

        _latitude = [self.parseLatitudeArray objectAtIndex:i];
        _longitude = [self.parseLongitudeArray objectAtIndex:i];

            CLLocationCoordinate2D coordinates [[_latitude count]];

        for (int i = 0; i < [_latitude count]; i++) {

            CLLocationCoordinate2D coordinate;
            double latitude = [[_latitude objectAtIndex:i] doubleValue];
            double longitude = [[_longitude objectAtIndex:i] doubleValue];
            coordinate.latitude = latitude;
            coordinate.longitude = longitude;
            coordinates[i] = coordinate;
        }
            [_coordinatesArray addObject:coordinates];

        }
        NSLog(@"coordinates array = %@", _coordinatesArray);

起初我想我可以用[_coordinatesArray addObject：coordinates]做到这一点。但后来意识到这样做不行！

At first I figured I would be able to do it using [_coordinatesArray addObject:coordinates]; but then realised that would not work!

我可能会遗漏一些非常基本的东西，但任何帮助都会受到赞赏。
谢谢

I may be missing something really basic but any help would be appreciated. Thanks

编辑：
属性定义：

property Definitions:

@property NSMutableArray *latitudeArray;
@property NSMutableArray *parseLatitudeArray;
@property NSMutableArray *longitudeArray;
@property NSMutableArray *parseLongitudeArray;
@property NSMutableArray *coordinatesArray;
@property NSArray *latitude;
@property NSArray *longitude;
@property CLLocationCoordinate2D *coordinates;

推荐答案

而不是创建结构的C数组，换行将每个结构体转换为一个对象并将其添加到NSMutableArray中。因此，在创建坐标后，只需：

Instead of creating a C-array of structs, wrap each struct into an object and add it to an NSMutableArray. So after you create coordinate, just:

[coordinatesArray addObject: [NSValue valueWithMKCoordinate:coordinate]];

并且要取回价值：

CLLocationCoordinate2D coordinate;
[coordinatesArray[i] getValue:&coordinate];

因此，假设self.latitude和self.longitude是NSStrings的NSArrays：

So, assuming that self.latitude and self.longitude are NSArrays of NSStrings:

//only property is now
@property (nonatomic, strong) NSArray * locations 

-(void) loadCoordinatesFromParse {
    NSDictionary * parseData;
    //load parseData from Parse here
    NSMutableArray * coordinates = [NSMutableArray array];
    NSArray * latitudes = [parseData objectForKey:@"latitude"];

    NSArray *longitudes = [parseData objectForKey:@"longitude"];

    for (int i = 0; i < [latitudes count]; i++) {
        double latitude = [latitudes[i] doubleValue];
        double longitude = [longitudes[i] doubleValue];
        CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(latitude, longitude);
        [coordinates addObject: [NSValue valueWithMKCoordinate:coordinate]];
    }

    NSLog(@"coordinates array = %@", coordinates);
    self.locations = [NSArray arrayWithArray: coordinates];
}

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