iphone - 构建期间出现此错误的原因可能是什么 - 'undefined symbols for architecture i386"

Question

这是我第一次使用定位服务，我遇到了这个链接器错误:

Undefined symbols for architecture i386: "_OBJC_CLASS_$_CLLocationManager"

我添加了 #import <CoreLocation/CoreLocation.h>并在 viewDidLoad 中添加以下行

 CLLocationManager *manager = [[CLLocationManager alloc] init];
manager.delegate = self;
[manager startUpdatingLocation];
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

if (![CLLocationManager locationServicesEnabled]){
    UIAlertView *servicesDisabledAlert = [[UIAlertView alloc] initWithTitle:@"Location Services Disabled" message:@"You currently have all location services for this device disabled. If you proceed, you will be asked to confirm whether location services should be reenabled." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [servicesDisabledAlert show];
    [servicesDisabledAlert release];
}
[manager release];                

Answer 1

您需要将 CoreLocation 框架添加到您的项目中。