iOS_折叠展开 FoldTextView

1. 显示效果

Test1：直接使用：

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Test2：在 cell 里使用：

2. 使用

2.1 直接使用

// 1.1 init view
private lazy var mooFoldTextView: MOOFoldTextView = {let view = MOOFoldTextView(frame: .zero)view.backgroundColor = .cyanview.mooDelegate = selfreturn view
}()
// 1.2 init conifg
private lazy var attributeTextConfig: MOOFoldTextConfig = {let config = MOOFoldTextConfig()config.allText ="""Swift is a type-safe language, which means the language helps you to be clear about\the types of values your code can work with. If part of your code requires a String,\type safety prevents you from passing it an Int by mistake. Likewise, type safety\prevents you from accidentally passing an optional String"""config.paragraph.lineSpacing = 10.0config.contentWidth = CGRectGetWidth(self.view.bounds)return config
}()// 2.1 add to super view
self.view.addSubview(self.mooFoldTextView)
// 2.2 set config and reload
self.mooFoldTextView.mooConfig = self.mooFoldTextConfig
self.mooFoldTextView.mooReloadText()// 3 set frame
self.mooFoldTextView.frame = CGRect(x: 0.0,y: 100.0,width: CGRectGetWidth(self.view.bounds),height: self.mooFoldTextConfig.mooCurrentHeight())// 4 Implement Proxy
extension MOOTest1ViewController: MOOFoldTextViewDelegate {func mooFoldViewShouldUpdateLayout(_ foldTextView: MOOFoldTextView) {// update layout after fold state changedself.view.setNeedsLayout()}
}         

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2.2 在 cell 中使用

2.2.1 at Custom TableViewCell

// 1.1 init
private lazy var attributeTextView: MOOFoldTextView = {let view = MOOFoldTextView(frame: .zero)view.backgroundColor = .cyanview.mooDelegate = selfreturn view
}()
// 1.2 add to super view
self.contentView.addSubview(self.attributeTextView)
// 1.3 set frame
self.attributeTextView.frame = self.contentView.bounds// 2 receive config and set to textView
var mooConfig: MOOFoldTextConfig = MOOFoldTextConfig() {didSet {self.attributeTextView.mooConfig = self.mooConfigself.attributeTextView.mooReloadText()}
}// 3.1 define protocol to forward event
public protocol MOOTableViewCellDelegate: AnyObject {func mooCellShouldReloadData(_ cell: UITableViewCell)
}
// 3.2
weak var mooDelegate: MOOTableViewCellDelegate?
// 3.3
extension MOOTableViewCell: MOOFoldTextViewDelegate {func mooFoldViewShouldUpdateLayout(_ foldTextView: MOOFoldTextView) {self.mooDelegate?.mooCellShouldReloadData(self)}
}

2.2.2 at View Controller

import MOOFoldTextView// 4.1 init tableView
private lazy var tableView: UITableView = {let view = UITableView(frame: .zero, style: .grouped)view.register(MOOTableViewCell.self, forCellReuseIdentifier: "MOOTableViewCell")view.dataSource = selfview.delegate = selfreturn view
}()
// 4.2 init dataSource with config
private lazy var dataSource: [MOOFoldTextConfig] = {let config = MOOFoldTextConfig()config.allText ="""Swift is a type-safe language, which means the language helps you to be clear about\the types of values your code can work with. If part of your code requires a String,\type safety prevents you from passing it an Int by mistake. Likewise, type safety\prevents you from accidentally passing an optional String"""config.paragraph.lineSpacing = 10.0config.contentWidth = CGRectGetWidth(self.view.bounds)return [config]
}()
// 4.3 add to super view
self.view.addSubview(self.tableView)
self.tableView.reloadData()
// 4.4 set frame
self.tableView.frame = CGRect(x: 0.0,y: 100.0,width: CGRectGetWidth(self.view.bounds),height: CGRectGetHeight(self.view.bounds) - 100.0);// 5.1 Implementation UITableViewDataSource
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {return self.dataSource.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {let cell = tableView.dequeueReusableCell(withIdentifier: "MOOTableViewCell",for: indexPath)if let cell = cell as? MOOTableViewCell {cell.mooConfig = self.dataSource[indexPath.row]cell.mooDelegate = self}return cell
}
// 5.2 Implementation UITableViewDelegate
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {let config = self.dataSource[indexPath.row]return config.currentHeight()
}// 6 reload data after fold state changed
extension MOOTest2ViewController: MOOTableViewCellDelegate {func mooCellShouldReloadData(_ cell: UITableViewCell) {self.tableView.reloadData()}
}

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