将NSDictionary作为参数传递给UITapGestureRecognizer [英] Pass a NSDictionary as parameter to UITapGestureRecognizer

问题描述

我想将 NSArray 作为参数传递给 UITapGestureRecognizer ，并在downloadOptionPressed方法中访问它。我该怎么做？

I want to pass a NSArray as a parameter to UITapGestureRecognizer and access it in downloadOptionPressed method. How can I do this ?

NSArray

NSArray *parameters = [NSArray arrayWithObjects:currentTrack, nil];

创建 UITapGestureRecognizer

UITapGestureRecognizer *downloadOptionPressed = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(timeFrameLabelTapped:)];
    [downloadOption addGestureRecognizer:downloadOptionPressed];

downloadOptionPressed 方法

-(void)downloadOptionPressed:(UIGestureRecognizer*)recognizer{

}

推荐答案

您是否有理由不能将信息存储在拥有的视图控制器中？是抽象吗？

Is there a reason you can't store the information in the owning view controller? Is it for abstraction?

您可以随时扩展UITapGestureRecognizer以携带更多数据：

You can always extend UITapGestureRecognizer to carry more data:

@interface UserDataTapGestureRecognizer : UITapGestureRecognizer
@property (nonatomic, strong) id userData;
@end

@implementation UserDataTapGestureRecognizer
@end

...

UserDataTapGestureRecognizer *downloadOptionPressed =
    [[UserDataTapGestureRecognizer alloc] initWithTarget:self
    action:@selector(timeFrameLabelTapped:)];
downloadOptionPressed.userData = parameters;

...

- (void)downloadOptionPressed:(UserDataTapGestureRecognizer *)recognizer {
    NSArray *parameters = recognizer.userData;
}

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