为自定义 UITableViewCell 的按钮处理按钮触摸事件的最佳做法是什么?
What is best practice to handle a button touch event for a button of a custom UITableViewCell?
我的课程:MyViewController, MyCustomCell
我能想到三个选项:
第一个选项- 将按钮作为 MyCustomCell 的属性，然后在 MyViewController .m 文件中为其添加目标MyViewController 作为目标.
First option- Have the button as a property of MyCustomCell, and then add a target to it in the MyViewController .m file with MyViewController as the target.
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 中制作的，将 nib File's Owner 设置为 MyViewController，在中实现 buttonTapped: 方法MyViewController 并将按钮的 Touch Up Inside 事件连接到 buttonTapped: 方法.
Second option- If the custom cell was made in IB, Set the nib File's Owner to be MyViewController, implement buttonTapped: method in MyViewController and connect the button's Touch Up Inside event to the buttonTapped: method.
第三个选项-如果自定义单元格不是在 IB 中制作的，请在 MyCustomCell .m 文件中使用 MyCustomCell 作为目标.
定义一个 MyCustomCellDelegate 添加 @property (nonatomic, assign) id委托给MyCustomCell，并在点击按钮时调用此委托.
创建单元格时将MyViewController设置为单元格的delegate，实现MyCustomCellDelegate协议.
Third option- if the custom cell wasn't made in IB, add a target to the button in the MyCustomCell .m file with MyCustomCell as the target.
Define a MyCustomCellDelegate add @property (nonatomic, assign) id<MyCustomCellDelegate> delegate to MyCustomCell and call this delegate when button tapped.
Set MyViewController as the cell's delegate when creating cells and implement the MyCustomCellDelegate protocol.
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...
}
}
将单元格的行存储为自定义按钮的 tag 属性.
Store the row of the cell as tag property of your custom button.
- (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);
}
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