1，样例说明：
（1）列表内容从Controls.plist文件中读取，类型为Array。
（2）点击列表项会弹出消息框显示该项信息。
（3）按住列表项向左滑动，会出现删除按钮。点击删除即可删除该项。
2，效果图
3，单元格复用机制：
由于普通的表格视图中对的单元格形式一般都是相同的，所以本例采用了单元格复用机制，可以大大提高程序性能。
实现方式是初始化创建UITableView实例时使用registerClass(UITableViewCell.self,forCellReuseIdentifier: "SwiftCell")创建一个可供重用的UITableViewCell。并将其注册到UITableView，ID为SwiftCell。下次碰到形式（或结构）相同的单元就可以直接使用UITableView的dequeueReusableCellWithIdentifier方法从UITableView中取出。
4，示例代码
---ViewController.swift ---
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import
UIKit
class
ViewController
:
UIViewController
,
UITableViewDelegate
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,
UITableViewDataSource
{
var
ctrlnames:[
String
]?
tableView:
UITableView
?
override
func
loadView() {
super
.loadView()
}
viewDidLoad() {
.viewDidLoad()
//初始化数据，这一次数据，我们放在属性列表文件里
self
.ctrlnames =
NSArray
(contentsOfFile:
NSBundle
.mainBundle().pathForResource(
"Controls"
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,ofType:
"plist"
)!)
as
?
Array
print
(
.ctrlnames)
//创建表视图
.tableView =
UITableView
(frame:
.view.frame,style:
UITableViewStyle
.
Plain
)
.tableView!.delegate =
self
.tableView!.dataSource =
self
//创建一个重用的单元格
.tableView!.registerClass(
UITableViewCell
.
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,forCellReuseIdentifier:
"SwiftCell"
)
.view.addSubview(
.tableView!)
//创建表头标签
let
headerLabel =
UILabel
(frame:
CGRectMake
(0,
.view.bounds.size.width,30))
headerLabel.backgroundColor =
UIColor
.blackColor()
headerLabel.textColor =
.whiteColor()
headerLabel.numberOfLines = 0
headerLabel.lineBreakMode =
NSLineBreakMode
ByWordWrapping
headerLabel.text =
"常见 UIKit 控件"
headerLabel.font =
UIFont
.italicSystemFontOfSize(20)
.tableView!.tableHeaderView = headerLabel
}
//在本例中，只有一个分区
numberOfSectionsInTableView(tableView:
) ->
Int
{
return
1;
}
//返回表格行数（也就是返回控件数）
tableView(tableView:
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,numberOfRowsInSection section:
{
return
.ctrlnames!.count
}
//创建各单元显示内容(创建参数indexPath指定的单元）
tableView(tableView:
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,cellForRowAtIndexPath indexPath:
NSIndexPath
)
->
UITableViewCell
{
//为了提供表格显示性能，已创建完成的单元需重复使用
identify:
=
"SwiftCell"
//同一形式的单元格重复使用，在声明时已注册
cell = tableView.dequeueReusableCellWithIdentifier(identify,forIndexPath: indexPath)
as
UITableViewCell
cell.accessoryType =
UITableViewCellAccessoryType
disclosureIndicator
cell.textLabel?.text =
.ctrlnames![indexPath.row]
cell
}
// UITableViewDelegate 方法，处理列表项的选中事件
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:0px 1em!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; background:none rgb(249,didSelectRowAtIndexPath indexPath:
)
{
.tableView!.deselectRowAtIndexPath(indexPath,animated:
true
)
itemString =
.ctrlnames![indexPath.row]
alertController =
UIAlertController
(title:
"提示!"
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,
message:
"你选中了【\(itemString)】"
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,preferredStyle:
UIAlertControllerStyle
Alert
)
okAction =
UIAlertAction
"确定"
UIAlertActionStyle
Default
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,handler:
nil
)
alertController.addAction(okAction)
.presentViewController(alertController,completion:
)
}
//滑动删除必须实现的方法
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:0px 1em!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; background:none rgb(249,
commitEditingStyle editingStyle:
UITableViewCellEditingStyle
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,
forRowAtIndexPath indexPath:
) {
(
"删除\(indexPath.row)"
)
index = indexPath.row
.ctrlnames?.removeAtIndex(index)
.tableView?.deleteRowsAtIndexPaths([indexPath],
withRowAnimation:
UITableViewRowAnimation
Top
)
}
//滑动删除
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:0px 1em!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; background:none rgb(249,editingStyleForRowAtIndexPath indexPath:
NSIndexPath
)
{
return
UITableViewCellEditingStyle
Delete
}
//修改删除按钮的文字
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:0px 1em!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; background:none rgb(249,
titleForDeleteConfirmationButtonForRowAtIndexPath indexPath:
String
? {
return
"删"
}
didReceiveMemoryWarning() {
.didReceiveMemoryWarning()
}
}
|
<?
xml
version
=
"1.0"
encoding
"UTF-8"
?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<
plist
"1.0"
>
array
>
string
>标签 UILabel</
>
>文本框 UITextField</
>
>按钮 UIButton</
>
>开关按钮 UISwitch</
>
>分段控件 UISegmentControl</
>
>图像 UIImageView</
>
>进度条 UIProgressView</
>
>滑动条 UiSlider</
>
>警告框 UIAlertView</
>
</
>
plist
>
|
NSArray是Objective-C里的数组类型。Array是Swift里的数组类型。
为了便于使用，这里把NSArray做了类型转换，转成Array。
as 关键字就是起到类型转换的作用。
NSArray是Objective-C原来就有的类型，Array是Swift新增的类型，Array新加许多方法，更便于操作，所以Swift中可以使用Array的尽量使用Array。var ctrlnames:Array? 可以简写成 var ctrlnames:[String]?