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38fdb6b7ff
Completely mechanical changes: - Explicit @objc in a few places - Some imported APIs changed - For the mix-and-match tests, just test version 4/5 instead of 3/4
48 lines
1.0 KiB
Swift
48 lines
1.0 KiB
Swift
// RUN: %target-run-simple-swift | %FileCheck %s
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// REQUIRES: executable_test
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// REQUIRES: objc_interop
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// rdar://problem/19060227
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import Foundation
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class ObservedValue: NSObject {
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@objc dynamic var amount = 0
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}
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class ValueObserver: NSObject {
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private var observeContext = 0
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let observedValue: ObservedValue
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init(value: ObservedValue) {
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observedValue = value
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super.init()
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observedValue.addObserver(self, forKeyPath: "amount", options: .new, context: &observeContext)
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}
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deinit {
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observedValue.removeObserver(self, forKeyPath: "amount")
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}
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override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
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if context == &observeContext {
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if let change_ = change {
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if let amount = change_[.newKey] as? Int {
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print("Observed value updated to \(amount)")
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}
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}
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}
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}
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}
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let value = ObservedValue()
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value.amount = 42
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let observer = ValueObserver(value: value)
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// CHECK: updated to 43
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value.amount += 1
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// CHECK: amount: 43
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dump(value)
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