Provides a vertical drawing of the tree structure which can view information about the tree‘s nodes and supports console debug views & layers and so on

Install

required iOS >= 9.0 Swift5.0 with Cocoapods

pod 'VerticalTree'

only install core functions

pod 'VerticalTree/Core'

install prettyPrint extension for view、layer、viewController

pod 'VerticalTree/PrettyExtension'

file structures

─┬─ "VerticalTree"
 ├─┬─ "Core": basic functions
 │ ├─── VerticalTreeProtocol
 │ ├─── VerticalTreeProtocolExtension
 │ └─── VerticalTreeNodeWrapper
 ├─┬─ "UI": draw a graph of VerticalTree which is foldable
 │ ├─── VerticalTreeCell
 │ ├─── VerticalTreeIndexView
 │ └─── VerticalTreeListController
 └─┬─ "PrettyExtension": pretty print in xcode console
   └─── VerticalTreePrettyPrint

core protocols

/// show the node info
public protocol Infomation {
    var nodeTitle: String { get }
    var nodeDescription: String? { get }
}

/// base treeNode structure and position
public protocol IndexPathNode {
    associatedtype T: IndexPathNode
    var parent: T? { get }
    var childs: [T] { get }
    var indexPath: IndexPath { get }
}

/// Node protocol
public protocol VerticalTreeNode: IndexPathNode where Self.T == Self {
    /// indexViewLegnth
    var length: TreeNodeLength { get }
    /// info description
    var info: Infomation { get }
    var isFold: Bool { set get }
}

Example for UIView

UIView is a tree structure

• VerticalTree in tableview
• VerticalTree in console log

Using

1. draw the VerticalTree in tableview

for example a UITableViewCell structure:

// in ViewController
let treeVC = VerticalTreeListController(source: NodeWrapper(obj: view))
// then show the treeVC

Config Node's info

in NodeWrapper's method

/// config current node’s property value and recurrence apply the same rule in childNodes if you want
///
/// - Parameters:
///   - inChild: recurrence config in child or just config current
///   - config: rules
/// - Returns: self
@discardableResult
public func changeProperties(inChild: Bool = true, config: (NodeWrapper<Obj>) -> Void) -> Self {}

follow picture: modify UIViewController's Wrapper

// default to change all subnode in the same rules unless inChild set false
let wrapper = NodeWrapper(obj: keyWindow.rootController).changeProperties {
    $0.isFold = false	// all node set unfold in default 
    $0.nodeDescription = "more infomation that you see now"
}

2. Text VerticalTree - in Console log

UIView as the example to follow the IndexPathNode protocol
see more others extension like CALayer，UIViewController in the demo

extension UIView: IndexPathNode {
    public var parent: UIView? {
        return superview
    }
    public var childs: [UIView] {
        return subviews
    }
}

get a wrapper of the view as a root node

// in ViewController
let rootNode = NodeWrapper(obj: view)
// print node structure in text
print(rootNode.subTreePrettyText())

Using UIView's Extension as an easier way, check here VerticalTree/PrettyText

extension IndexPathNode where Self: NSObject, Self == Self.T {
    /// print
    public func treePrettyPrint(inDebug: Bool = false) {...}
    /// baseTree‘s structure
    public func treePrettyText(inDebug: Bool = false) -> String {...}
    /// get ofTop‘s structure & highlight position of self
    public func treePrettyText(ofTop: Self, inDebug: Bool = false) { ... }
    // get the baseTree of rootNode
    public var getTreeRoot: Self { ... }
}

• print current view as root node

view.treePrettyPrint()

• print view's Window structure

view.getTreeRoot.treePrettyPrint()

• show more infomation

view.treePrettyPrint(inDebug: true)

BTW

• LLDB debug view & layer & controller's hierarchy
  • view & layer
    • method-1: po yourObj.value(forKey: "recursiveDescription")!
    • method-2: expression -l objc -O -- [yourObj recursiveDescription]
  • controller
    • method-1: po yourController.value(forKey: "_printHierarchy")!
    • method-2: expression -l objc -O -- [yourController _printHierarchy]

Author

XcodeYang, xcodeyang@gmail.com

License

VerticalTree is available under the MIT license. See the LICENSE file for more info.