swift 在Swift中重构：设置闭包

Posted 2021-05-19

func create<T>(_ setup: ((T) -> Void)) -> T where T: NSObject {
    let obj = T()
    setup(obj)
    return obj
}

let contentView: UIView = create {
    $0.backgroundColor = .red
    $0.clipsToBounds = true
}
let titleLabel: UILabel = create {
    $0.font = .systemFont(ofSize: 22)
    $0.textColor = .red
    $0.text = "WELCOME"
}
let stackView: UIStackView = create {
    $0.axis = .vertical
    $0.distribution = .fillEqually
    $0.alignment = .center
    $0.spacing = 8
}