ios - 我的 UIlabel 没有更新，我想让它更新移动车辆或自行车等的速度？

Question

我想更新我的 uilabel 的整数以提高速度，但它似乎不起作用。抱歉这个基本问题，但这让我困扰了一段时间。我创建了一个 mainviewcontroller.xib View 并尝试设置我的 Uilabel，但它们没有更新。我的 uilabel 叫做 speedView

- (void)viewDidLoad {
    [super viewDidLoad];

    CLController = [[CoreLocationController alloc] init];
    CLController.delegate = self;
    [CLController.locMgr startUpdatingLocation];

}
- (void)locationUpdate:(CLLocation *)location {
    NSNumber *speedCount = [NSNumber numberWithInt:1];
    [speedView setText: [NSString stringWithFormat:@"number is %@d",speedCount]];
    }

- (void)locationError:(NSError *)error {
    speedView.text = [error description];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
    return YES;
}

- (void)viewDidUnload {
}

- (void)dealloc {
    [CLController release];
    [super dealloc];
}


@end

@interface MainViewController : UIViewController <LoginDelegate,WEPopoverParentView,PopoverControllerDelegate,MainMenuDelegate,MKMapViewDelegate,UIActionSheetDelegate, CLLocationManagerDelegate>
{
    AppDelegate *appDelegate;
    IBOutlet MKMapView *userMap;
    IBOutlet UILabel *speedView;
}

@property (strong, nonatomic) IBOutlet UILabel *speedView;
@property(nonatomic) int speedCount;
- (void)setSpeedView:(UILabel *)speedView;

有人给我建议吗？我想。有什么想法为什么值(value)没有体现出来吗？

Answer 1

这很可能是因为您没有更新 speedCount 变量。目前只是处于待机阶段。您需要这样做:

// have number shown after being increased
speedCount++

这将在您的

之前需要

[speedView setText: [NSString stringWithFormat:@"number is %@d",speedCount]];

行

希望这对您有所帮助!