处理数据精度问题：也就是.000000的问题
- (NSString *)reviseString:(NSString *)str
{
if (str.length > 0) {
double conversionValue = [str doubleValue];
NSString *doubleString = [NSString stringWithFormat:@"%lf", conversionValue];
NSDecimalNumber *decNumber = [NSDecimalNumber decimalNumberWithString:doubleString];
return [decNumber stringValue];
}
return @"0";
}
