ameritech property management

Parameters for @property:We already know that in order to provide convenience to the developer, OC provides the @porperty keyword, which automatically generates the property's set and get methods.But we also know that in OC we still face the problem of object memory management, and we follow the principle of "who created, who frees" to manage memory.So we have to rewrite the Set method: Release the original member variable (object) and then retain the

One, assignRepresents the setting time to assign a value directly, rather than copying or preserving it.Two, retain.The new value is retained when the value is assigned. This property can only be used with Object-c object types.Three, copyWhen assigning a value, a copy of the new value is copied, and the copy is executed by copy, which is valid only for those object types that implement the Nscopying protocol.Reference: "The iphone and ipad developmen

@class usually does not occur. 4. Memory Management _property parameters:(when a member variable in a class has a number of OC The question of whether an object is to manage memory between objects is cumbersome, especially in setter methods, when the compiler introduces the property's retain parameter to manage memory. 1.retain: If the property has a retain parameter, the compiler will automatically add it

corruption in the C:\Windows\System32\Wbem\Repository directory, and WMI calls the file under that directory every 30-60 seconds, so you receive the above error message. Another ripple effect that can be caused by this failure is that you cannot view the properties of the local Area connection, the system is unresponsive when you run the Msinfo32 (View system Information) command, and the system prompts when the Wmimgmt.msc command opens the WMI snap-in "Failed to connect to local Computer due