Tableview 自定义单元格按钮

Question

I made a tableview with customcells. Cells include labels and a button. The question is, how can i detect the label's text when its button is pressed?

- (id)initWithFrame:(CGRect)frame reuseIdentifier:(NSString *)reuseIdentifier {
    if (self = [super initWithFrame:frame reuseIdentifier:reuseIdentifier]) {
    // Initialization code
        primaryLabel = [[UILabel alloc]init];
        primaryLabel.textAlignment = UITextAlignmentLeft;
        primaryLabel.font = [UIFont systemFontOfSize:11];
        primaryLabel.backgroundColor = [UIColor clearColor];
        secondaryLabel = [[UILabel alloc]init];
        secondaryLabel.textAlignment = UITextAlignmentLeft;
        secondaryLabel.font = [UIFont systemFontOfSize:9];
        secondaryLabel.backgroundColor = [UIColor clearColor];
        myImageView = [[UIImageView alloc]init];

        btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        btn.backgroundColor = [UIColor clearColor];

        [self.contentView addSubview:btn];
        [self.contentView addSubview:primaryLabel];
        [self.contentView addSubview:secondaryLabel];
        [self.contentView addSubview:myImageView];
    }

    return self;

}

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

    cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) 
    {
        cell = [[[CustomCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
    }

    return cell;
}

Answer 1

The method you are looking for is – addTarget:action:forControlEvents:

Using you example, you have a UIButton, btn, and let's say you have an action in your custom cell called myAction. The code would look like this:

[btn addTarget:self action:myAction forControlEvents:UIControlEventTouchUpInside];

Because myAction is a method in your cell, you can easily access the label property. If you need to put your action in a different controller:

[btn addTarget:otherController action:myAction forControlEvents:UIControlEventTouchUpInside];

In this case you will have to keep a reference to your cell in the controller. Since you probably have more than one cell you could keep an NSMutableArray as a property and add your cells as you build your table.