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我得到這個錯誤'updateTimer '未申報(在一次使用此功能)''updateTimer' 未申報(在一次使用此功能)
這是代碼:
#import <UIKit/UIKit.h>
@interface SleepAppFinalViewController : UIViewController
{
//IBOutlet UILabel *myLabel;
IBOutlet UILabel *_label;
NSTimer *timer;
}
-(void)updateTimer;
.M
@implementation SleepAppFinalViewController
-(void)updateTimer {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"hh:mm:ss"];
_label.text = [formatter stringFromDate:[NSDate date]];
[formatter release];
}
- (void)viewDidLoad
{
timer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:(updateTimer) userInfo:nil repeats:YES];
[super viewDidLoad];
}
該錯誤是在「定時器」的viewDidLoad中線