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var isLike = false

if isLike {
  fetchDisLikeAPI()
} else {
  fetchLikeAPI()
}

isLike = !isLike

daoseng33

class MyCalss {
  var resultHandler: CompletionClosure = nil
}

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class MyCalss {
  var resultHandler: CompletionClosure 
}

daoseng33

typealias CompletionClosure = (() -> ())?

daoseng33

extension UITextView {
  func removeTextPadding() {
    textContainer.lineFragmentPadding = 0
    textContainerInset = .zero
  }
}

daoseng33

// 移除上下的間距
textView.textContainerInset = .zero
// 移除左右的間距
textView.textContainer.lineFragmentPadding = 0

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// Set textfield max length
private var __maxLengths = [UITextField: Int]()
extension UITextField {
    @IBInspectable var maxLength: Int {
        get {
            guard let l = __maxLengths[self] else {
                return Int.max // (global default-limit. or just, Int.max)
            }
            return l
        }

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override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    if isBeingPresented {
      // start timer
    }
  }
  
  override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

daoseng33

enum SectionTypes: CaseIterable {
    case header
    case list
}

print(SectionTypes.allCases.count) // 2

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enum SectionType: Int {
    case header = 0
    case list
    
    static let count: Int = {
        var max: Int = 0
        while let _ = SectionType(rawValue: max) { max += 1 }
        return max
    }()
}