将CLLocationCoordinates2D转换为NSValue [英] Converting CLLocationCoordinates2D into an NSValue

问题描述

我只是想将 CLLocationCoordinates 转换为 NSValue ，以便在稍后带回的数组中使用我的应用。这是我的代码：

I'm simply trying to convert CLLocationCoordinates into an NSValue to be used in an array brought back later in my app. Here is my code:

  NSUInteger count = [self.locations count];
    CLLocationCoordinate2D coordinates[count];
    for (NSInteger i = 0; i < count; i++) {
        coordinates[i] = [(CLLocation *)self.locations[i] coordinate];
        NSValue *locationValue = [NSValue valueWithMKCoordinate:coordinates[i]];
        [_locationsArray addObject:locationValue];
        NSLog(@"location = %@", _locationsArray);
    }

然而 NSLog 显示数组填充（Null）值。我不确定我在哪里出错，有人指出我正确的方向？

However the NSLog displays that the array is filled with (Null) values. I'm not sure where I have gone wrong here, an someone point me in the right direction?

推荐答案

我没有看到坐标数组中的任何需要。你可能没有初始化它。
尝试：

I didn't see any need in coordinatesarray. And you probably didn't initialised it. Try:

_locationsArray = [NSMutableArray array];
for (CLLocation *location in self.locations) {
    NSValue *locationValue = [NSValue valueWithMKCoordinate: location.coordinate];
    [_locationsArray addObject:locationValue];
    NSLog(@"location = %@", _locationsArray);
}

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