“无法识别的选择器发送到实例"错误是什么意思? [英] What does the “unrecognized selector sent to instance” error mean?

问题描述

由于以下错误，我的应用崩溃了:

-[NSCFString count]: unrecognized selector sent to instance 0x612b060

有人可以告诉我这是什么意思，如何在我的代码中找到引用为0x612b060的行

解决方案

您正在调用已释放或尚未初始化的对象(可能是数组，字典或集合的集合)上的count方法. /p>

I am getting a crash in my app due to the following error:

-[NSCFString count]: unrecognized selector sent to instance 0x612b060

Can anybody tell me what does it mean and how can i find the line in my code with reference 0x612b060

解决方案

You are calling count method on an object (probably a collection e.g array, dictionary, or set) which is released or has not been initialized yet.

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