ios - 将值传递给 IBAction

Question

我会很快的。我有 6 张图像，附有 6 个手势和 1 个 IBAction。我希望每个手势都向操作传递一个参数，这样我就不必编写 6 个单独的操作。这是我的代码:

    oneImage =[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"one.gif"]];
    two Image=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"two.gif"]];
    +4 more images

     UITapGestureRecognizer *oneGest=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(insertChar:)];
         UITapGestureRecognizer *twoGest=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(insertChar:)];
    +4 more gestures


    -(IBAction)insertChar:(id)sender
    {

    textfield.text = [textfield.text stringByAppendingString:@" PASS HERE VALUE FROM GESTURE,"ONE","TWO",etc "];
    }

Answer 1

无法将任意数据传递给 insertChar: 方法。 发送者将是手势识别器。这是一种可能的解决方案:

oneImage =[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"one.gif"]];
oneImage.tag = 1;
twoImage=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"two.gif"]];
twoImage.tag = 2;
// +4 more images

UITapGestureRecognizer *oneGest=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(insertChar:)];
UITapGestureRecognizer *twoGest=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(insertChar:)];
// +4 more gestures

-(IBAction)insertChar:(UITapGestureRecognizer *)sender {
    static NSString *labels[6] = { @"ONE", @"TWO", ... @"SIX" };
    UIView *view = sender.view;
    NSInteger tag = view.tag;
    NSString *label = labels[tag - 1]; // since tag is 1-based.

    textfield.text = [textfield.text stringByAppendingString:label];
}