清除而不是释放 NSMutableString
我有一个相当大的循环，它获取一个字符串，对其执行一些操作，然后再进入下一个字符串。我最初是释放它然后重新分配它，但认为这有点浪费资源，但不知道如何清除它以重用它。
I've got a rather large loop that gets a string, does something to it, than goes onto the next one. I was originally releasing it then reallocating it but thought that is a bit of waste of resources but can't figure out how to just clear it out to reuse it.
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所选的解决方案将崩溃并出现以下错误：
“尝试使用 setString 改变不可变对象：”
这对我有用：
self.myString = [NSMutableString stringWithString:@""];
确保你在你的类中综合了 myString 。
The selected solution will crash with the following error:
'Attempt to mutate immutable object with setString:'
This worked for me instead:
self.myString = [NSMutableString stringWithString:@""];
make sure you synthesize myString in your class.
一种方法是
[myString setString: @""]。One way would be
[myString setString: @""].