ios - 将 NSDictionary 作为参数传递给 UITapGestureRecognizer

Question

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？

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{

}

Answer 1

您不能将信息存储在拥有的 View Controller 中有什么原因吗？是为了抽象吗？

您始终可以扩展 UITapGestureRecognizer 以携带更多数据:

@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;
}