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iOS Development note--[__nsarrayi Addobjectsfromarray:]: Unrecognized selector error

Source: Internet
Author: User
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Operation Nsmutablearray number increased and deleted when the crash, error [__nsarrayi Addobjectsfromarray:]: Unrecognized selector.

For one hours, the "__nsarrayi" this hint is more important. Check it out.

__NSArrayIis a code-word for an immutable array-that are, a "regular" NSArray which you cannot the change.

__NSArrayMis a code-word for a mutable array-that is, NSMutableArray . NSMutableArrayin, you can add and remove items.

Actually Nsarrayi is Nsarray.

Nsarraym is Nsmutablearray.

Strangely, I am clearly declaring that it is nsmutablearray. How suddenly turned into a nsarray.

The code was found to be copied using. Copy when copying the array, and Nsmutablearray copying the array. mutablecopy!!!

iOS Development note--[__nsarrayi Addobjectsfromarray:]: Unrecognized selector error

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