如何从NSArray获得NSNumber的总和？

Question

我有一个像大等NSArray包含...NSNumbers3, 4, 20, 10, 1, 100,

如何将所有这些NSNumber的总和(3 + 4 + 20 + 10 + 1 + 100 + etc...)作为一个总和NSInteger？

谢谢!

Answer 1

你可以用这个:

NSArray* numbers = //array of numbers
NSNumber* sum = [numbers valueForKeyPath: @"@sum.self"];

Answer 2

NSInteger sum = 0;
for (NSNumber *num in myArray) {
  sum += [num intValue];
}

Answer 3

long long sum = ((NSNumber*)[array valueForKeyPath: @"@sum.longLongValue"]).longLongValue;