问题描述
限时送ChatGPT账号..我有一个 viewController,它有一个属性:UIScrollView
,并且同一个控制器包含一个 tableView.我的 UIScrollView
包含按钮.我如何使用 [tableView reloadData]
触摸其中的一些按钮?tableView 数据源和委托位于 viewController 上.
I have an viewController, which has a property:UIScrollView
, and same controller contains a tableView. My UIScrollView
contains buttons. How can i use [tableView reloadData]
from touching some of this buttons? tableView data source and delegate is on viewController.
MyViewController:
@property (strong, nonatomic) MyScrollView* scrollView;
@property (strong, nonatomic) IBOutlet UITableView *table;
MyScrollView 类:
没有属性和 5 个以编程方式创建的按钮.
no property and 5 buttons created programatically.
推荐答案
在更好地理解您要做什么之后,我想我会使用委托.尽管还有其他方法可以做到这一点,但我认为委托是灵活的,如果您还没有使用它们,那么现在是了解它们的好时机.
After better understanding what you're trying to do I think I would use delegates. Although there are other ways to do this I think that delegates are flexible and if you haven't used them yet then this is a good time to learn about them.
如果一个类希望采用我们的协议,我们定义了它需要实现的委托方法:MyScrollView.h
We define the delegate methods that a class needs to implement if it wishes to adopt our protocol: MyScrollView.h
@protocol MyScrollViewDelegate <NSObject>
-(void)reloadTableData;
@end
@interface MyScrollView : UIScrollView
@property (nonatomic,weak) id<MyScrollViewDelegate> delegate;
@end
然后在实现中我们执行以下操作:
Then in the implementation we do the following:
MyScrollView.m
// Set the button's target
[button addTarget:self action:@selector(reloadData) forControlEvents:UIControlEventTouchUpInside];
// Here we check if our delegate responds to the reloadTableData selector and if so we call it
-(void)reloadData
{
if ([self.delegate respondsToSelector:@selector(reloadTableData)])
{
[self.delegate reloadTableData];
}
}
在 MyViewController 的实现中,我们添加了 MyScrollViewDelegate
并实现了 reloadTableData
方法:
In the implementation of MyViewController we add the MyScrollViewDelegate
and implement the reloadTableData
method:
MyViewController.m
@interface MyViewController () <MyScrollViewDelegate>
@property (strong, nonatomic) MyScrollView* scrollView;
@property (strong, nonatomic) IBOutlet UITableView *table;
@end
// Set the delegate after you've created scrollView
self.scrollView.delegate = self;
// Once the delegate is called we simply reload the table data
-(void)reloadTableData
{
[self.table reloadData]
}
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