ios - 将 CLLocationCoordinates2D 转换为 NSValue

Question

我只是想将 CLLocationCoordinates 转换为 NSValue 以用于稍后在我的应用程序中带回的数组。这是我的代码:

  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);
    }

但是 NSLog 显示数组中填充了 (Null) 值。我不确定这里哪里出了问题，有人指出我正确的方向吗？

Answer 1

我没有看到任何需要 coordinates 数组。你可能没有初始化它。尝试:

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