Swift - 在自定义单元格中添加长按手势识别器 [英] Swift - Adding long press gesture recognizer in custom cell
问题描述
因此，我的表格视图中有一个自定义单元格类和一个用于单元格的 xib 文件，并且我想为自定义单元格添加长按识别.
So I have a custom cell class and a xib file for my cells in my tableview, and I want to add a long press recognition to the custom cell.
我尝试将长按识别器拖放到 xib 文件中的单元格，使文件的所有者成为手势的委托，然后将其从文档大纲拖放"到自定义类 swift 文件.我还将 UIGestureRecognizerDelegate 添加到自定义单元格类.
I tried to drag and drop the long press recognizer to the cell in the xib-file, make the file's owner the gesture's delegate, and then "drag and add" it from the document outline to the custom class swift-file. I also added the UIGestureRecognizerDelegate to the custom cell class.
现在，当我运行应用程序时，我收到一个线程 1:信号 SIGABRT 错误，老实说我不知道为什么.这是我第一次使用手势识别器，如果有明显的错误或我应该做的事情，请见谅.
Now when I run the app I get a Thread 1: signal SIGABRT error, and honestly I have no idea why. This is the first time I use the gesture recognizer so sorry if there's an obvious mistake or something I should've done.
对如何进行的任何建议将不胜感激.
Any suggestions on how to proceed would be appreciated.
正如洛根建议的那样，我撤消了所做的一切并按照他的步骤进行.我的自定义类中的代码现在如下所示:
As Logan suggested I undid everything that was done and followed his steps. The code in my custom class now looks like this:
@IBAction func pressed(sender: AnyObject) {
func handleLongPress(sender: UILongPressGestureRecognizer) {
if sender.state == .Began {
println("Received longPress!")
}
}
}
但我仍然收到错误消息.我注意到的是，如果我只是将手势添加到 xib 文件并运行应用程序，则会出现错误.我不知道是不是因为我还没有将它连接到自定义类文件，但我想我只是把它扔在那里.
But I still get the error. What I noticed is that if I just add the gesture to the xib-file and run the app, I get the error. I don't know if that is because I haven't connected it to the custom class file yet, but I thought I'd just throw it out there.
编辑 2:将我的代码更改为此后:
EDIT 2: After changing my code to this:
@IBAction func pressed(sender: UILongPressGestureRecognizer) {
if sender.state == .Began {
println("Received longPress!")
}
}
我仍然收到错误消息.
我不知道我是否说清楚了，但我什至无法加载屏幕，它立即崩溃了.所以我认为这是一个委托/参考问题，以下是我的参考资料:
I don't know if I made this clear, but I can't even load the screen, it just crashes right away. So I'm thinking this is a delegation/reference issue, here's how my references are:
1) 我将我的 xib 文件所有者的类设置为自定义单元类.2)我在单元格上拖动手势识别器.3)我将手势对象拖到文件所有者，以便文件所有者是其委托.4)我在自定义类中添加了上面的代码.5) 我将手势对象拖到文件所有者处，以便手势在自定义类中连接到代码".
1) I set the class of my xib-file owner to the custom cell class. 2) I dragged the gesture recognizer on the cell. 3) I dragged the gesture object to the file-owner so that the file owner is its delegate. 4) I added the code from above in my custom class. 5) I dragged the gesture object to the file-owner so that the gesture is "connected to the code" in the custom class.
这些都是我的步骤，正如我所说，我怀疑某处存在委托问题.
These are all my steps, and as I said, I suspect there's a delegate issue somewhere.
推荐答案
我遇到了类似的问题.问题是，当您向 xib 文件添加手势识别器时，有多个对象(您的 tableview 单元格和手势识别器)并且 tableview 数据源无法处理此问题.该错误正确描述了问题.我将我的 tableview 单元格移动到主故事板，而不是将其保存在单独的 xib 文件中以解决此问题.
I had a similar issue. The problem is that when you add a gesture recognizer to the xib file, there are multiple objects (your tableview cell and the gesture recognizer) and the tableview datasource cannot handle this. The error describes the problem correctly. I moved my tableview cell to the main storyboard instead of keeping it in a separate xib file to resolve this issue.
原因:为标识符 (CELL) 注册的笔尖无效 - 笔尖必须恰好包含一个必须是 UITableViewCell 实例的顶级对象"
您的问题的另一种解决方案是在如下代码中创建手势识别器:
Another solution to your problem would be to create the gesture recognizer in code like:
self.tap = [[UITapGestureRecognizer alloc] initWithTarget:self动作:@selector(tapFired:)];
self.tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapFired:)];
在自定义表格视图单元格的awakeFromNib中.
in the awakeFromNib for the custom table view cell.
我只是认为基本问题是您不能在表格视图单元格 xib 中添加手势识别器，然后让表格视图数据源加载单元格.
I just think the basic issue is that you cannot add gesture recognizers in a table view cell xib and then have the tableview data source load the cell.
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