How get the total sum of NSNumber's from a NSArray?

问题

I have a large NSArray containing NSNumbers like 3, 4, 20, 10, 1, 100, etc...

How do I get the total sum of all these NSNumbers (3 + 4 + 20 + 10 + 1 + 100 + etc...) as one total NSInteger?

Thank you!

回答1:

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

回答2:

You can use this:

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

回答3:

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

回答4:

Iterate through the array

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

回答5:

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

回答6:

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

may this will help you

来源：https://stackoverflow.com/questions/11192503/how-get-the-total-sum-of-nsnumbers-from-a-nsarray