iphone - NSInvalidArgumentException 原因 :-[CLLocation distanceFromLocation:]

Question

我有这段代码可以只获取半径 10 公里以内的咖啡馆:

for (NSString *ndlog in log) {
    NSString *name = [names objectAtIndex:i];
    NSString *city = [citys objectAtIndex:i];
    NSString *chain = [chains objectAtIndex:i];
    NSString *street = [streets objectAtIndex:i];
    NSString *ndlig = [lig objectAtIndex:i];
    dlog = [ndlog doubleValue];
    dlig = [ndlig doubleValue];
    NSLog(@"%@,%@,%@,%@,%f,%f,%@,%@", name, city, chain, street, dlog, dlig, ndlog, ndlig);
    CLLocation *location = [[CLLocation alloc] initWithLatitude:dlog longitude:dlig];
    double meters = [userLocation distanceFromLocation:location];
    if (meters < 10000) {
        NSString *data = [NSString stringWithFormat:@"%@,%@,%@,%@", name, city, chain, street];
        [tableData addObject:data];
    }
    i++;
}

它在 iOS 模拟器上运行，但在 iPhone 2G 上崩溃。 (iOS 3.1.3)

我的代码有什么不对？

Answer 1

distanceFromLocation 方法仅适用于 iOS 3.2 及更高版本。来自 the documentation :

Available in iOS 3.2 and later. Declared In CLLocation.

我猜你的模拟器是更新版本的 iOS。