我正在尝试开发一个提供当前纬度和经度值的 iPhone 应用程序，但遇到了一些名为“未定义声明”的错误。你能帮我解决一下吗？提前致谢。
#import "LoginViewController.h"
//#import <CoreLocation/CoreLocation.h>
@interface LoginViewController ()
@end
@implementation LoginViewController
@synthesize locationManager;
- (void)dealloc
{
// [super dealloc];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)Button:(id)sender
{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
locationManager.distanceFilter = kCLDistanceFilterNone;
[locationManager startUpdatingLocation];
CLLocation *location = [locationManager location];
CLLocationCoordinate2D coordinate = [location coordinate];
NSString *latitude = [NSString stringWithFormat:@"%f", coordinate.latitude];
NSString *longitude = [NSString stringWithFormat:@"%f", coordinate.longitude];
NSLog(@"dLatitude : %@", latitude);
NSLog(@"dLongitude : %@", longitude);
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, 40, 250, 50)];
UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, 80, 200, 50)];
UILabel *myLabel1 = [[UILabel alloc] initWithFrame:CGRectMake(50, 120, 200, 100)];
myLabel.textColor = [UIColor blackColor];
myLabel1.textColor = [UIColor blackColor];
label.backgroundColor = [UIColor clearColor];
myLabel.backgroundColor = [UIColor clearColor];
myLabel1.backgroundColor = [UIColor clearColor];
[myLabel setText:latitude];
[myLabel1 setText:longitude];
label.text = @"Current Latitude and Longitude";
[self.view addSubview:label];
[self.view addSubview:myLabel];
[self.view addSubview:myLabel1];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait); <---GETTING ERROR HERE
}
@end