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Reduce the number of calls to setFrame (#10)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| import UIKit | ||
|
|
||
| @MainActor | ||
| private final class Proxy { | ||
|
|
||
| static var key: Void? | ||
| private weak var base: UIControl? | ||
|
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| init(_ base: UIControl) { | ||
| self.base = base | ||
| } | ||
|
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| var onTouchUpInside: (@MainActor () -> Void)? { | ||
| didSet { | ||
| base?.addTarget( | ||
| self, | ||
| action: #selector(touchUpInside(sender:)), | ||
| for: .touchUpInside | ||
| ) | ||
| } | ||
| } | ||
|
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| var onValueChanged: (@MainActor () -> Void)? { | ||
| didSet { | ||
| base?.addTarget( | ||
| self, | ||
| action: #selector(valueChanged(sender:)), | ||
| for: .valueChanged | ||
| ) | ||
| } | ||
| } | ||
|
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| @objc private dynamic func touchUpInside(sender: AnyObject) { | ||
| onTouchUpInside?() | ||
| } | ||
|
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| @objc private dynamic func valueChanged(sender: AnyObject) { | ||
| onValueChanged?() | ||
| } | ||
| } | ||
|
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| extension UIControl { | ||
|
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| /// [Local extension] | ||
| public func onTap(_ closure: @MainActor @escaping () -> Swift.Void) { | ||
| proxy.onTouchUpInside = closure | ||
| } | ||
|
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| public func onValueChanged(_ closure: @MainActor @escaping () -> Swift.Void) { | ||
| proxy.onValueChanged = closure | ||
| } | ||
|
|
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| private var proxy: Proxy { | ||
| get { | ||
| if let handler = objc_getAssociatedObject(self, &Proxy.key) as? Proxy { | ||
| return handler | ||
| } else { | ||
| self.proxy = Proxy(self) | ||
| return self.proxy | ||
| } | ||
| } | ||
| set { | ||
| objc_setAssociatedObject(self, &Proxy.key, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC) | ||
| } | ||
| } | ||
| } | ||
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| extension UIButton { | ||
| static func make(title: String, _ onTap: @escaping () -> Void) -> UIButton { | ||
| let button = UIButton(frame: .zero) | ||
| button.setTitle(title, for: .normal) | ||
| button.onTap(onTap) | ||
| return button | ||
| } | ||
| } |
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