Swift: 以编程方式在 UICollectionViewCell 中的 IndexPath 中使用多个 UIButton,下一个 addTarget 不单击
Swift: Multiple UIButton in a IndexPath in a UICollectionViewCell programmatically, next addTarget does not click
我以编程方式在 UICollectionViewCell
的 indexPath 中制作了多个 UIButton。现在我想打印 "clicked add to favourite",但点击 UIButton
后它没有打印任何东西。 UIButton
确实可以查看除 addTarget
功能之外的所有内容,但不能单击。
import UIKit
//**UICollectionViewCell**
class DescriptionCell: UICollectionViewCell, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
override init(frame: CGRect) {
super.init(frame: frame)
setupCell()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
lazy var addToCart: UIButton = {
let btn = UIButton()
btn.setTitle("Add to favourite", for: .normal)
btn.isUserInteractionEnabled = true
btn.setTitleColor(.white, for: .normal)
btn.backgroundColor = UIColor.orange
btn.titleLabel?.font = UIFont.boldSystemFont(ofSize: 8)
btn.titleLabel?.textAlignment = .right
// addToCart not click
btn.addTarget(self, action: #selector(addToCartTarget), for: .touchUpInside)
btn.layer.cornerRadius = 12
return btn
}()
func setupCell() {
addSubview(addToCart)
addConstraintsWithFormat("H:|-80-[v0]-80-|", views: addToCart)
addConstraintsWithFormat("V:|-380-[v0(25)]|", views: addToCart)
}
func addToCartTarget() {
print("you clicked add to favourite")
}
}
尝试使用如下框架初始化按钮:
let btn = UIButton(frame: CGRect(x: 10, y: 10, width: 50, height: 20))
我以编程方式在 UICollectionViewCell
的 indexPath 中制作了多个 UIButton。现在我想打印 "clicked add to favourite",但点击 UIButton
后它没有打印任何东西。 UIButton
确实可以查看除 addTarget
功能之外的所有内容,但不能单击。
import UIKit
//**UICollectionViewCell**
class DescriptionCell: UICollectionViewCell, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
override init(frame: CGRect) {
super.init(frame: frame)
setupCell()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
lazy var addToCart: UIButton = {
let btn = UIButton()
btn.setTitle("Add to favourite", for: .normal)
btn.isUserInteractionEnabled = true
btn.setTitleColor(.white, for: .normal)
btn.backgroundColor = UIColor.orange
btn.titleLabel?.font = UIFont.boldSystemFont(ofSize: 8)
btn.titleLabel?.textAlignment = .right
// addToCart not click
btn.addTarget(self, action: #selector(addToCartTarget), for: .touchUpInside)
btn.layer.cornerRadius = 12
return btn
}()
func setupCell() {
addSubview(addToCart)
addConstraintsWithFormat("H:|-80-[v0]-80-|", views: addToCart)
addConstraintsWithFormat("V:|-380-[v0(25)]|", views: addToCart)
}
func addToCartTarget() {
print("you clicked add to favourite")
}
}
尝试使用如下框架初始化按钮:
let btn = UIButton(frame: CGRect(x: 10, y: 10, width: 50, height: 20))