如何在NSMutableArray中添加所有十进制数字
问题描述：
我有一个NSMutableArray，里面有一些NSDecimalNumber，例如(500,50.80,70,8000)
I have a NSMutableArray which have some NSDecimalNumber in it, like (500,50.80,70,8000)
现在，我要将所有这些decimal numbers一起添加.
Now I want to add all those decimal numbers together.
我尝试使用
for (NSDecimalNumber *number in self.numbersArray)
{
NSDecimal *sum += [number decimalValue]
}
但是失败了.
答
使用- (NSDecimalNumber *)decimalNumberByAdding:(NSDecimalNumber *)decimalNumber
NSDecimalNumber *lNumber = [NSDecimalNumber zero];
for (NSDecimalNumber *number in self.numbersArray)
{
lNumber = [lNumber decimalNumberByAdding:number];
}