App crashes with reason: Collection <__NSArrayM: 0x7071700> was mutated while being enumerated

Question

Can you please help me to find reason why my app crashes after clicking on segmented control? Not allways, but usualy after some clicks.

Error message:

Answer 1

solved

I had same problem in coredata objects enumeration.

Do not change sub object which relies in ARRAY on which Loop is Running

Like ==>>

If I change/Modify object while in loop, it will give this error.

 for (LoadList *objLL in ArrLoadList) {             // here Enumaration is Going on
        // here I removed objects in ArrLoadList and reassign the ArrLoadList .. 
        // it will give me this error 
        // So Don't change the Main Array object 
 }