Objective c 在NSArray中迭代

有人能帮我修复我的代码吗。我试图做一些简单的事情，遍历包含NSString的整个数组，将它们转换为NSInteger，并将它们分配给NSInteger变量

 for  (NSInteger *itemF in myNSArray) {
     //WHERE "slotA" is an NSInteger and "itemF" is stored as an NSString and I wanna conver to NSInteger 
     //and store is in the var.
     slotA=itemF;          
}  

for (NSString *string in array)
{
  NSInteger integer = [string integerValue]; 
}