Accuracy issues in iOS

In iOS, there are often situations where precision is distorted, and some common ways to prevent distortion are summarized below.

1. Double Turn number precision distortion

Double money = 89.99;

NSNumber *moneynum = [NSNumber Numberwithdouble:money];

NSLog (@ "%@", moneynum); At this time output 89.9899999999999;

Using Nsdecimalnumber

Moneynum = [Nsdecimalnumber decimalnumberwithstring:[nsstring stringwithformat:@ "%f", money]];

NSLog (@ "%@", moneynum); Output 89.99 at this time

2.

Accuracy issues in iOS