Swiftui view onReceive method receives "redundant" event resolution

summary

As we all know ,SwiftUI It provides us with convenient onReceive Modifier method , To receive events sent by external publishers .

But in some cases , We need to shield some irrelevant “ redundancy ” event .

such as ,SwiftUI Medium Picker The publisher corresponding to the bound value , It's always there Picker Send an event when creating , This is what we don't want ：

As shown above ,Picker Views can be created by users on demand , But every time it is created, it will send a change event of the binding property .

How to avoid receiving this “ It's useless ” What about the incident ？

Actually , Just a small change in the code , We can fix this problem perfectly ！

Let’s go！

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Source code reproduction

The relevant source code is as follows ：

@objc(BSUToday)
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