我创建了一个执行 UIText FieldDelegate 的类, 所以我只需要使用 [MyDelegateClasss setDelegate: text Feelt someConfigparams:...] 来使用它。 它将在内部创建一个对象, 并指定给 text FeeldiDelate 。
发布时出现问题: setDelegate 方法在 UIText Field 中并不保留对象,所以我无法仅自动释放它。我可以在外部保留一个引用来释放它,但是它很丑而且容易出错,因为我需要在代表类之外做额外工作。 分分类 UITextFeldield 是一个不好的选择, 因为我需要总是使用这个可能与其他人相冲突的子类。
当 UIText Field 对象在不依赖 MyDelegateClass 外的代码的情况下被销毁时,我能否释放代表对象?
我假设[MyDelegateClasss setDelegate:text Field someConfigparams:...] 创造和实例 MyDelegateClasss, 并指定这个例子作为提供文本字段的代表。 我要做的是将MyDelegateClass 的例子变成单吨, 意思是只有一例。
基本上,在这种情况下,MyDelegateClasss将保留一个强烈的提法 : “ 单次静态”, 并且只要您的申请能保持生命, 或者直到您有意释放它, 这个例子就会一直存在下去。 一个对象的例子完全可以代表许多文本字段。 这个类别中一个单一的活的例子的记忆影响 总是会是恒定的, 也就是说, 不成长, 并且非常小 。
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