@end 在实现上下文中丢失[关闭]

我没有足够的声誉来发布图片..所以希望你能够帮助我解决这个问题。在第三行，其中写着“@implementation viewcontroller”，我的 xcode 告诉我“@end 在实现上下文中丢失” 提前致谢！

@interface ViewController ()
@end

@implementation ViewController

- (void)viewDidLoad {
    mainInt = 0;
    randomMain = [NSTimer scheduledTimerWithTimeInterval:(1.0/1.0) target:self selector:@selector(randomMainvoid) userInfo:nil repeats:YES];
}


- (void)randomMainvoid {
    mainInt +=1;
    label.text = [NSString stringWithFormat:@"%d", mainInt];       
}    


- (IBAction)Start {
    [startButton setHidden:YES];
    timer = [NSTimer scheduledTimerWithTimeInterval:(0.0088) target:self selector:@selector(onTimer) userInfo:nil repeats:YES];
    pos = CGPointMake(5.0, 6.0);
}

在......的最后@implementation ViewController你需要@end

你的 .m 应该是这样的：

@interface ViewController ()
@end

@implementation ViewController

- (void)viewDidLoad {
    mainInt = 0;
    randomMain = [NSTimer scheduledTimerWithTimeInterval:(1.0/1.0) target:self selector:@selector(randomMainvoid) userInfo:nil repeats:YES];
}


- (void)randomMainvoid {
    mainInt +=1;
    label.text = [NSString stringWithFormat:@"%d", mainInt];       
}    


- (IBAction)Start {
    [startButton setHidden:YES];
    timer = [NSTimer scheduledTimerWithTimeInterval:(0.0088) target:self selector:@selector(onTimer) userInfo:nil repeats:YES];
    pos = CGPointMake(5.0, 6.0);
}

@end