Untitled
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| Language | Swift |
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| Owner | w3xue |
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| Modified | |
| Visibility | Public |
var counter = 0; // 引用计数器
class BaseClass {
init() {
counter=counter+1
}
deinit {
counter=counter-1
}
}
var show: BaseClass? = BaseClass()
print(counter)
show = nil
print(counter)
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