我正在整理我的 iPhone 应用程序的一些内存问题，并且我一直在考虑一些基础知识。如果我设置了一个 ivar 并且在对象的生命周期内从未使用过它，那么当我在其上调用 dealloc 时，会导致问题吗？例如

@interface testClass {
    id myobject;
}
@property (nonatomic, retain) id myobject;
@end

@implementation testClass
@synthesize myobject;
- (id)init {
    ...
    // Do I have to set myobject to nil here?
    // So if myobject isn't used the dealloc call to nil
    // will be okay? Or can you release the variable without
    // having set every object to nil that you may may not use 
    ...
}

...

// Somewhere in the code, myobject may be set to
// an instance of an object via self.myobject = [AnObject grabAnObject]
// but the object may be left alone

...

- (void)dealloc {
    [myobject release];
    [super dealloc];
}
@end

最佳答案

实例变量are initialized to 0在初始化程序运行之前..

https://stackoverflow.com/questions/1786781/