Question: reason: '*-[nscfarray insertobject: atindex:]: mutating method sent to immutable ..

A very small pull-up refresh was very simple and has been done before, but this time there are hundreds of problems, this problem is even more troublesome for nearly a day, as I could not solve this problem, I could not really fall asleep. So I put down my work and gave up my mind carefully. Then I took a hard look at this article and got it done, after reading this article on both sides, you can understand it with a thorough understanding.

The reason is that the variable was assigned a value before, and a variable method cannot be stubbornly assigned to an immutable object.

The original text is excerpted as follows:

Error message :*
Terminating app due to uncaught exception 'nsinternalinconsistencye Xception ', reason :'*  -[Nscfarray insertobject: atindex:]: mutating method sent to immutable object'

The problem occurs in the statement:

[SavearrayAddobject: [nsnumber numberwithint: savenum];

A mutable method is sent to an immutable object.

PS: @ property (nonatomic, retain)
Nsmutablearray *Savearray;

Previously assigned values:

 

Nsmutablearray * Array
= [[Nsmutablearray alloc] init];

Self. savearray=
Array;

[Array release];

Solution:

 

Nsmutablearray * mutaarray
= [[Nsmutablearray alloc] init];

[Mutaarray addobjectsfromarray: savearray];

[Mutaarray Addobject: [nsnumber Numberwithint: savenum];
Self. savearray
= Mutaarray [mutaarray release];

Address: http://blog.sina.com.cn/s/blog_6123f9650101b0zl.html