寻找一种在仪器之外验证和检查任何保留周期的方法

Question

仪器是一个累赘的工具，它的内存泄漏检查往往找不到保留周期。示例:委托模式(委托不是弱的)肯定会创建一个保留周期，但不知何故泄漏不会出现。一个保持循环肯定是一个漏洞吗？寻找一个仪器之外的日志机制-代码，我可以嵌入到我的项目，以检测这一点。

Answer 1

尝试了这个手动记录器，您可以对正在分析的类的init进行如下操作：

struct WeakStruct {
   weak var weakObject: AnyObject?
  let objectName: String
}


public class RetainCycleLogger {
     var weakStructs = [WeakStruct]()
     public static let sharedInstance = RetainCycleLogger()

     public func addObject(object: AnyObject) {
          weakStructs.append(WeakStruct(weakObject: object, objectName: classNameAsString(object)))
     }

     func count(object: AnyObject) -> Int {
         let classname = classNameAsString(object)
         return weakStructs.filter({$0.objectName == classname}).flatMap({$0.weakObject}).count
     }

     func classNameAsString(obj: Any) -> String {
         return String(reflecting: obj)
     }

     public func printAllCounts() {
         let classes = weakStructs.filter({$0.weakObject != nil}).map({$0.objectName})
         let uniqueClasses: [String] = Array(Set(classes))
         for className in uniqueClasses {
             print("---- Class: \(className) \(classes.filter({$0 == className}).count)")
         }
     }
 }