Recent questions tagged delegates

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delegates - How can I make a weak protocol reference in 'pure' Swift (without @objc)

weak references don't seem to work in Swift unless a protocol is declared as @objc, which I don't want in a ... 'pure' Swift way to accomplish a weak delegate? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delegates - Why cannot take address to a nested local function in 64 bit Delphi?

AS. since closing related questions - more examples added below. The below simple code (which finds ... compare function outside of btn1Click function. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delegates - C#: Difference between ' += anEvent' and ' += new EventHandler(anEvent)'

Take the below code: private void anEvent(object sender, EventArgs e) { //some code } What is the difference ... former is just syntactic sugar of the latter. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delegates - Unsubscribe anonymous method in C#

Is it possible to unsubscribe an anonymous method from an event? If I subscribe to an event like this: void ... unsubscribe this anonymous method? If so, how? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delegates - How to update the label text in code for each state in swift?

override func viewDidLoad() { super.viewDidLoad() let label = UILabel(frame: .zero) label.backgroundColor = .orange stackView ... -the-label-text-in-code-for-each-state-in-swift...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delegates - How do I get a black banner with text to dynamically show depending upon what a user does on another screen in Flutter?

I am tasked with the challenge of getting a black banner to show when a user returns from a screen on that ... -black-banner-with-text-to-dynamically-show-depending-upon-what-a...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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530 views

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delegates - 自定义委托过滤器VC Swift5(Custom Delegate Filter VC Swift5)

I'm adding a custom delegate to my app and, for some reason, it is not working. (我正在向我的应用添加自定义委托，由于某种原因， ... 中的委托未更新？) Thanks (谢谢) ask by André Fernandes translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

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delegates - 自定义委托过滤器VC Swift5(Custom Delegate Filter VC Swift5)

I'm adding a custom delegate to my app and, for some reason, it is not working. (我正在向我的应用添加自定义委托，由于某种原因， ... 中的委托未更新？) Thanks (谢谢) ask by André Fernandes translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

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