CODEWITHSUNDEEP
iosiphoneipadcocoa-touchenumeration
Duck
Duck

Reputation: 35973

NSMutableArray enumerateObjectsUsingBlock is not synchronous as Apple says

Is this a bug?

I have this lines:

[myArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {

     NSLog(@"%d", idx);
}];

NSLog(@"end");

This should print like this

"0"
"1"
"2"
...
"end"

but it is printing like

"end"
"0"
"1"
"2"
...

Apple says enumerateObjectsWithOptions:usingBlock: is synchronous, so "end" should not be printed before the enumeration, right?

Can you guys confirm?

Upvotes: 3

Views: 2637

Answers (2)

James Frost
James Frost

Reputation: 6990

enumerateObjectsUsingBlock: is definitely synchronous. I just ran the same example in CodeRunner:

NSArray *myArray = @[ @1, @2, @3, @4, @5 ];
[myArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    NSLog(@"%d", idx);
}];

NSLog(@"end");

And got the following output:

0
1
2
3 
4
end

Upvotes: 7

Rui Peres
Rui Peres

Reputation: 25917

Cannot confirm this, it's printing as expected: "0","1","2","End". Also notice that you are printing indexes but your log starts at "1".

Upvotes: 2

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