Tell The Program What To Do When No Save Data Is Found NSUserDefaults, iPhone

Question

I have saved data which was saved using NSUserDefaults. I was under the impression that if there was nothing saved to the key already (first time app is run) it would defaul

Answer 1

if  (setbatteryHealthCalculated = 0) {

Ehm. Should be

if  (setbatteryHealthCalculated == 0)

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The comparison operator is == instead of = in C-like languages.

The original code will set setbatteryHealthCalculated to 0 no matter what. Since 0 is false, the if branch will never be executed and no alerts would be shown.

Also, the original code has unbalanced braces.

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BTW, is setbatteryHealthCalculated an ivar? If yes, remove the NSInteger before it. Otherwise you're declaring a local variable which shadows the ivar.