将NSString转换为NSInteger

Question

我有

NSString *strAmount = @"10.00";
NSInteger totalAmount = totalAmount + [strAmount integerValue];

输出

  

totalAmount = 80

但我希望输出为totalAmount = 10

Answer 1

1. 首先totalAmount不应该是指针类型。
2. 变量“totalAmount”在其自己的初始化
中使用时未初始化

用

替换你的代码

NSString *strAmount = @"10.00";
NSInteger totalAmount =  0;
totalAmount = totalAmount + [strAmount integerValue];
 NSLog(@" %ld",(long)totalAmount);

  

输出= 10

Answer 2

为什么你做了指向int的指针？

NSInteger totalAmount 0;
totalAmount = totalAmount + [strAmount integerValue];

Answer 3

将NSInterger *total替换为NSInteger total或将NSInteger转换为int（基于C）

NSString *strAmount = @"10.00";

NSInteger totalAmount = 0;
totalAmount = totalAmount + [strAmount integerValue];