问题描述
我有一个 PFQueryTableViewController
,其中我正在尝试学习一些tableView交互。
I have a PFQueryTableViewController
in which I am trying to learn some tableView interactions.
我现在拥有的东西:tableView单元格在点击 didSelectRowAtIndexPath
时增加其高度,或者我基本上可以使细胞相关数据到下一个viewController使用 performSegueWithIdentifier
和 prepareForSegue
一次点击。
What I currently have: The tableView cell increases its height on a tap didSelectRowAtIndexPath
or I can basically segue cell related data to next viewController using performSegueWithIdentifier
together with prepareForSegue
using a single tap.
在下面的代码中,如果我评论点击代码以增加tableView单元格的高度代码,我可以检测到双击。其他方面,单击会增加高度,因为代码在didSelect块内。
In the below code, if I comment the "Tap code to increases height of tableView cell" code, I can detect double tap. Other wise the single tap increases the height as the code is inside didSelect block.
我需要什么:
单击时,单元格高度增加或减少。当单元格高度增加时,如果我双击,它应该将单元格数据分割到下一个 UIViewController
。
如果没有,单击会增加或减少高度。并且双击应该将单元格数据划分到下一个 UIViewController
If not, the single tap should increase or decrease the height. And double tap should segue cell data to next UIViewController
代码如下:
var selectedCellIndexPath: NSIndexPath?
var SelectedCellHeight = CGFloat() // currently set to 480.0 tableView height
var UnselectedCellHeight = CGFloat() // currently set to 300.0 tableView unselected hight
....
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if let selectedCellIndexPath = selectedCellIndexPath {
if selectedCellIndexPath == indexPath {
return SelectedCellHeight
}
}
return UnselectedCellHeight
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
var cell = tableView.dequeueReusableCellWithIdentifier("cell") as! DataViewTableViewCell!
if cell == nil {
cell = DataViewTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "cell")
}
// Below is the double Tap gesture recognizer code in which
// The single tap is working, double tap is quite difficult to get
// as the cell height increases on single tap of the cell
let doubleTap = UITapGestureRecognizer()
doubleTap.numberOfTapsRequired = 2
doubleTap.numberOfTouchesRequired = 1
tableView.addGestureRecognizer(doubleTap)
let singleTap = UITapGestureRecognizer()
singleTap.numberOfTapsRequired = 1
singleTap.numberOfTouchesRequired = 1
singleTap.requireGestureRecognizerToFail(doubleTap)
tableView.addGestureRecognizer(singleTap)
// Tap code to increases height of tableView cell
if let selectedCellIndexPath = selectedCellIndexPath {
if selectedCellIndexPath == indexPath {
self.selectedCellIndexPath = nil
cell.postComment.fadeIn()
cell.postCreatorPicture.alpha = 1
cell.postDate.fadeIn()
// cell.postTime.fadeIn()
cell.postCreator.fadeIn()
} else {
self.selectedCellIndexPath = indexPath
}
} else {
selectedCellIndexPath = indexPath
}
tableView.beginUpdates()
tableView.endUpdates()
}
func doubleTap() {
print("Double Tap")
}
func singleTap() {
print("Single Tap")
}
我可以让它工作的另一种方法是,如果我能得到 NSIndexPath在
,我基本上可以使用双击执行if else来获取所需的操作。你能在tableView默认块之外得到 didSelectRowAtIndexPath
代码之外的所选单元格的 NSIndexPath
吗?
The other way I can make it work is, if I can get NSIndexPath
of selected cell outside of didSelectRowAtIndexPath
code, I can basically use the double tap to perform if else to get the required action. Can you get NSIndexPath
outside the tableView default blocks?
推荐答案
搞定了工作!
首先:定义var customNSIndexPath = NSIndexPath()并在 didSelectRowAtIndexPath
代码块中添加以下代码。
First: Define var customNSIndexPath = NSIndexPath() and add the below code inside the didSelectRowAtIndexPath
code block.
customNSIndexPath = indexPath
print(customNSIndexPath)
第二步:从 didSelectRowAtIndexPath
中删除点击代码以增加tableView单元格的高度代码并添加到 singleTap()
功能。并使用 doubleTap()
执行segue。
Second: Remove "Tap code to increases height of tableView cell" code from didSelectRowAtIndexPath
and add to the singleTap()
function. And perform segue using the doubleTap()
.
func doubleTap() {
print("Double Tap")
performSegueWithIdentifier("MainToPost", sender: self)
}
func singleTap() {
print("Single Tap")
var cell = tableView.dequeueReusableCellWithIdentifier("cell") as! DataViewTableViewCell!
if cell == nil {
cell = DataViewTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "cell")
}
if let selectedCellIndexPath = selectedCellIndexPath {
if selectedCellIndexPath == customNSIndexPath {
self.selectedCellIndexPath = nil
} else {
self.selectedCellIndexPath = customNSIndexPath
}
} else {
selectedCellIndexPath = customNSIndexPath
}
tableView.beginUpdates()
tableView.endUpdates()
}
这就是你在没有睡觉的情况下工作到很晚的方法。这是最简单的事情。谢谢
This is how you screw up working late without sleeping. It was the easiest thing to do. Thanks
注意:如果有人有更好的解决方案,或者某些xyz案例中的错误,请发表评论。如果你的更好,它会真正帮助别人。
Note: If someone has better solution or this one is wrong in some xyz case, please do comment. If yours is better it would really help others.
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