分配和释放VS。自动释放。为什么以及何时？
我看到很多人都在分配和释放 NSString。
我知道这样做的好处是字符串会立即释放，而不是通过 autoRelease 释放。
我的问题：
- 它有效吗？我应该总是更喜欢在 autoRelease 上分配和释放吗？
- 更广泛的是-立即分配和释放，然后再次分配或在dealloc中分配、使用和释放。
将不胜感激任何解释。
谢谢沙尼
I see that many people are allocating and releasing NSStrings.
I understand that the benefit is that the string is being released immediately and not by autoRelease.
my questions :
- does it effective and should i always prefer allocating and releasing on autoRelease?
- what is more expansive - allocating and releasing immediately and then allocating again OR allocating, using and releasing in dealloc.
will appreciate any explanation.
Thanks
shani
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NSAutoreleasePoolpool.我不明白如何重用 NSString。重用 NSMutableString 实例可能比重新创建它稍快一些，但您不会看到差异。专注于代码的简单性和可维护性。
我认为你的问题是使用 [[NSString alloc] init] 还是 [NSString string]。只要性能不是问题，就始终选择最简单的。这将是自动发布的版本，因为您不需要自己发布它。
I don't see how you could re-use a NSString. Reusing a NSMutableString instance might be slightly faster the recreating it but you won't see the difference. Focus on simplicity and maintainability of your code.
I think your question is wether to use [[NSString alloc] init] or [NSString string]. As long as performance is not an issue, always go with the simplest one. That would be the autoreleased version, because you don't need to release it yourself.