目标c - 处理自定义UITableViewCell按钮的按钮触摸事件的最佳实践

Question

处理自定义按钮的按钮触摸事件的最佳做法是什么UITableViewCell？

我的课: MyViewController,MyCustomCell

我可以想到三个选择:

第一个选项 -将按钮作为属性MyCustomCell,然后在MyViewController.m文件中添加目标MyViewController作为目标.

MyViewController .m文件

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"customCell";

    MyCustomCell *cell = (MyCustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
    cell = [[[MyCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

    [cell.theButton addTarget:self
                       action:@selector(theButtonTapped:)
             forControlEvents:UIControlEventTouchUpInside];
    }

    // Configure the cell...    
    [self configureCell:cell atIndexPath:indexPath];

    return cell;
}

- (void)theButtonTapped:(UIButton *)sender
{
    MyCustomCell *selectedCell = (MyCustomCell *)sender.superview;

    if (selectedCell) {
        NSIndexPath *indexPath = [self.tableView indexPathForCell:selectedCell];
        MyModel *selectedModel = [self.model objectAtIndex:indexPath.row]; 

        // do something with the model...
    }
}

第二个选项 -如果自定义单元格是在IB中创建的,请将nib文件的所有者设置为MyViewController,实现buttonTapped:方法MyViewController并将按钮的Touch Up Inside事件连接到该buttonTapped:方法.

第三个选项 -如果自定义单元格不是在IB中制作的,则将目标添加到MyCustomCell.m文件中的按钮MyCustomCell作为目标.
定义MyCustomCellDelegate添加@property (nonatomic, assign) id<MyCustomCellDelegate> delegate到MyCustomCell,并调用此委托时,按钮被窃听.在创建单元格和实现协议时
设置MyViewController为单元格的委托MyCustomCellDelegate.

MyCustomCell .h文件

@class MyCustomCell;  

@protocol MyCustomCellDelegate <NSObject>
- (void)buttonTappedOnCell:(MyCustomCell *)cell;
@end

@interface MyCustomCell : UITableViewCell

@property (nonatomic, retain) UIButton *theButton;
@property (nonatomic, assign) id<MyCustomCellDelegate> delegate;

@end

MyCustomCell .m文件

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // Initialization code
        self.theButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        self.theButton.frame = CGRectMake(10,10,50,30);
        [self addSubview:self.theButton];

        [self.theButton addTarget:self
                           action:@selector(theButtonTapped:)
                 forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}

- (void)theButtonTapped:(UIButton *)sender
{
    [self.delegate buttonTappedOnCell:self];
}

MyViewController .m文件

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"customCell";

    MyCustomCell *cell = (MyCustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[MyCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

        cell.delegate = self;
    }

    // Configure the cell...    
    [self configureCell:cell atIndexPath:indexPath];

    return cell;
}

- (void)buttonTappedOnCell:(MyCustomCell *)selectedCell
{
    if (selectedCell) {
        NSIndexPath *indexPath = [self.tableView indexPathForCell:selectedCell];
        MyModel *selectedModel = [self.model objectAtIndex:indexPath.row];

        // do something with the model...
    }
}

Answer 1

将单元格行存储为tag自定义按钮的属性.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // bla bla bla
    if (!cell)
    {
        //bla bla bla
        [cell.yourButton addTarget:self selector:@selector(yourButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
    }
    // bla bla bla
    cell.yourButton.tag = indexPath.row;
}

-(void)yourButtonTapped:(id)sender
{
    int tag = [(UIButton *)sender tag];
    NSLog(@"tapped button in cell at row %i", tag);
}