如何从NSArray获得NSNumber的总和？

Question

我有一个大NSArray个NSNumbers，如3, 4, 20, 10, 1, 100,等...

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

谢谢！

Answer 1

您可以使用：

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;

Answer 4

遍历数组

int count = [array count];
NSInteger sum = 0;
for (int i = 0; i < count; i++) {
    sum += [[array objectAtIndex:i] integerValue];
}

Answer 5

[[numbersArray valueForKeyPath:@"@sum.self"] integerValue]

Answer 6

int total = 0;
for (NSNumber *number in array)
{
  total += [number intValue];
}

这可能会对你有所帮助