使用block闭包遍历数组

__block BOOL found =NO;

   NSArray *array = [NSArrayarrayWithObjects:@"one",@"two",@"three",nil];

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

        if ([objlocalizedCaseInsensitiveCompare:@"two"] ==NSOrderedSame) {

            *stop =YES;

            found =YES;

            NSLog(@"Enumerate is done");

        }

    }];