如果我在UITableView的一行中有一个按钮,我理解如何获得按钮点击,但我无法弄清楚的是将按钮添加到UITableViewCell子类并在我的UITableView类中获得点击的正确方法。我想我把错误放在layoutSubviews方法中。有人可以指出我正确的方向吗?
-(void) layoutSubviews
{
// UIButton *myButton1; <- This is declared as a property in my subclass header file
[super layoutSubviews];
//self.textLabel.frame = CGRectMake(0, 0, 40, 20);
// cell.textLabel.text = timeElapsed;
self.textLabel.frame = CGRectMake( 5, 5, 80, self.frame.size.height - 10 );
self.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
// Don't need UIButton alloc because method below does it for us..
myButton1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
//CGRect cellFrame = [self.tableView rectForRowAtIndexPath:indexPath];
CGRect cellFrame = self.frame;
myButton1.tag = idButton;
int nButtonWidth = 80;
int nButtonHeight = 30;
int nActualCellWidth = cellFrame.size.width - 40;
int nButtonDeltaX = ( nActualCellWidth - nButtonWidth ) / 2;
int nButtonDeltaY = ( cellFrame.size.height - nButtonHeight ) / 2;
myButton1.frame = CGRectMake( nButtonDeltaX, nButtonDeltaY, nButtonWidth, nButtonHeight );
[myButton1 setTitle:@"OK" forState:UIControlStateNormal];
// PDS: Add delaget for stopwatch clicking..
// [myButton1 addTarget:self action:@selector(buttonClickedStopWatch:) forControlEvents:UIControlEventTouchUpInside];
[self.contentView addSubview:myButton1];
[self.contentView bringSubviewToFront:myButton1];
}
答案 0 :(得分:4)
首先,可以多次调用layoutSubviews,这样就不是创建按钮并将其添加到视图层次结构的好地方。这将导致每次都创建一个新按钮。您应该在指定的初始化程序中创建按钮,并仅使用layoutSubviews来设置框架等。
其次,UITableView的实例通常不是处理按钮点击的好地方。这通常是UIViewController的子类的任务。
无论您选择哪个类来处理点按操作,都可以在单元格中为自定义按钮添加属性。然后让UITableView或UIViewController通过访问属性并将target设置为self来为该控件事件添加操作目标。