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1 import UIKit 2 3 class ViewController: UIViewController,UITableViewDelegate, 4 UITableViewDataSource { 5 6 var tableView:UITableView? 7 8 var ctrlnames:[String] = ["UILabel 标签","UIButton 按钮","UIDatePiker 日期选择器", 9 "UITableView 表格视图"] 10 11 var selectedCellIndexPath:NSIndexPath! 12 13 override func viewDidLoad() { 14 super.viewDidLoad() 15 16 //创建表视图 17 self.tableView = UITableView(frame: UIScreen.mainScreen().applicationFrame, 18 style:UITableViewStyle.Plain) 19 self.tableView!.delegate = self 20 self.tableView!.dataSource = self 21 //创建一个重用的单元格 22 self.tableView!.registerClass(UITableViewCell.self, forCellReuseIdentifier: "SwiftCell") 23 self.view.addSubview(self.tableView!) 24 } 25 26 //在本例中,只有一个分区 27 func numberOfSectionsInTableView(tableView: UITableView!) -> Int { 28 return 1; 29 } 30 31 //返回表格行数(也就是返回控件数) 32 func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 33 return self.ctrlnames.count 34 } 35 36 //创建各单元显示内容(创建参数indexPath指定的单元) 37 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) 38 -> UITableViewCell 39 { 40 var label = UILabel(frame:CGRectZero) 41 label.setTranslatesAutoresizingMaskIntoConstraints(false) 42 label.text = self.ctrlnames[indexPath.row] 43 44 var textview=UITextView(frame:CGRectZero) 45 textview.setTranslatesAutoresizingMaskIntoConstraints(false) 46 textview.textColor = UIColor.grayColor() 47 //演示效果,暂时写死 48 textview.text = "UIDatePicker 是一个控制器类,封装了 UIPickerView,但是他是UIControl的子类," 49 50 let identify:String = "SwiftCell" 51 var cell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier:identify) 52 //自动遮罩不可见区域,超出的不显示 53 cell.layer.masksToBounds = true 54 cell.contentView.addSubview(label) 55 cell.contentView.addSubview(textview) 56 57 //创建一个控件数组 58 var views:NSMutableDictionary = NSMutableDictionary() 59 views.setValue(label, forKey: "label") 60 views.setValue(textview, forKey: "textview") 61 cell.contentView.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat( 62 "H:|-15-[label]-15-|", options: nil, metrics: nil, views: views)) 63 cell.contentView.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat( 64 "H:|-15-[textview]-15-|", options: nil, metrics: nil, views: views)) 65 cell.contentView.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat( 66 "V:|[label(40)]", options: nil, metrics: nil, views: views)) 67 cell.contentView.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat( 68 "V:|-40-[textview(80)]", options: nil, metrics: nil, views: views)) 69 return cell 70 } 71 72 // UITableViewDelegate 方法,处理列表项的选中事件 73 func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) 74 { 75 self.tableView!.deselectRowAtIndexPath(indexPath, animated: false) 76 selectedCellIndexPath = indexPath 77 // Forces the table view to call heightForRowAtIndexPath 78 tableView!.reloadRowsAtIndexPaths([indexPath], 79 withRowAnimation: UITableViewRowAnimation.Automatic) 80 } 81 82 //点击单元格会引起cell高度的变化,所以要重新设置 83 func tableView(tableView: UITableView, 84 heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { 85 if(selectedCellIndexPath != nil && selectedCellIndexPath == indexPath){ 86 return 120 87 } 88 return 40 89 } 90 }
iOS开发——UI_swift篇&UITableView实现单元格展开与隐藏
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原文地址:http://www.cnblogs.com/iCocos/p/4674728.html