OC保留两位小数

// 保留两位小数

- (NSNumber *)toTheNearestHundredth:(CGFloat)originFloat {
   if (originFloat == 0) {
       return @0;
   }
   // 精确到百分位
   NSInteger multiplyFloat = originFloat * 100;
   CGFloat resultFloat = multiplyFloat * 1.0 / 100;
   return [NSNumber numberWithFloat:resultFloat];
}