以編程方式添加id步進器

Question

我想向步進器添加一個動作以編程方式添加，但我不知道如何獲取單擊哪個步進器。我有一個NSMutableArray我更改值，但我想知道哪個步進器被點擊。這裏是我的代碼：

- (void)viewDidLoad { 
[super viewDidLoad]; 
// Do any additional setup after loading the view. 


for (int i = 0; i < count; i++) { 

    //Here I create the stepper 
    UIStepper *steperCode = [[UIStepper alloc] initWithFrame:CGRectMake(40, (i*30)+120, 300, 200)]; 
    steperCode.maximumValue = 1000; 
    steperCode.minimumValue = 0; 
    steperCode.stepValue=1.0; 
    [self.view addSubview:steperCode]; 

} 

非常感謝！

Answer 1

試試這個

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    for (int i = 0; i < count; i++) 
    { 
    UIStepper * stepperCode = [[UIStepper alloc] initWithFrame:CGRectMake(140, 60, 300, 200)]; 
    [steperCode addTarget:self action:@selector(valueChanged:) forControlEvents:UIControlEventValueChanged]; 
    stepperCode.maximumValue = 10; 
    stepperCode.minimumValue = 0; 
    stepperCode.stepValue=2.0; 
    stepperCode.tag = i; 
    [self.view addSubview:stepperCode]; 
    } 
} 

- (IBAction)valueChanged:(UIStepper *)sender 
{ 
    NSLog(@"Changed stepper num :%i",sender.tag); 
}