objective C将NSString转换为unsigned

Question

我改变了我的问题。

我想将NSString转换为unsigned int 。

为什么？ 因为我想在PayPal中进行并行付款。

下面我给出了我想要将NSString转换为unsigned int的编码。

我的查询是：

    //optional, set shippingEnabled to TRUE if you want to display shipping
    //options to the user, default: TRUE
    [PayPal getPayPalInst].shippingEnabled = TRUE;

    //optional, set dynamicAmountUpdateEnabled to TRUE if you want to compute
    //shipping and tax based on the user's address choice, default: FALSE
    [PayPal getPayPalInst].dynamicAmountUpdateEnabled = TRUE;

    //optional, choose who pays the fee, default: FEEPAYER_EACHRECEIVER
    [PayPal getPayPalInst].feePayer = FEEPAYER_EACHRECEIVER;

    //for a payment with multiple recipients, use a PayPalAdvancedPayment object
    PayPalAdvancedPayment *payment = [[PayPalAdvancedPayment alloc] init];
    payment.paymentCurrency = @"USD";

    // A payment note applied to all recipients.
    payment.memo = @"A Note applied to all recipients";

    //receiverPaymentDetails is a list of PPReceiverPaymentDetails objects
    payment.receiverPaymentDetails = [NSMutableArray array];

    NSArray *emailArray = [NSArray arrayWithObjects:@"abc@def.com",@"def@abc.com", nil];

    for (int i = 1; i <= 2; i++) {
        PayPalReceiverPaymentDetails *details = [[PayPalReceiverPaymentDetails alloc] init];

        // Customize the payment notes for one of the three recipient.
        if (i == 2) {
            details.description = [NSString stringWithFormat:@"Component %d", i];
        }

        details.recipient = [NSString stringWithFormat:@"%@",[emailArray objectAtIndex:i-1]];

        unsigned order;

        if (i==1) {
            order = [[feeArray objectAtIndex:0] unsignedIntValue];
        }
        if (i==2) {
             order = [[amountArray objectAtIndex:0] unsignedIntValue];
        }

        //subtotal of all items for this recipient, without tax and shipping
        details.subTotal = [NSDecimalNumber decimalNumberWithMantissa:order exponent:-4 isNegative:FALSE];

        //invoiceData is a PayPalInvoiceData object which contains tax, shipping, and a list of PayPalInvoiceItem objects
        details.invoiceData = [[PayPalInvoiceData alloc] init];

        //invoiceItems is a list of PayPalInvoiceItem objects
        //NOTE: sum of totalPrice for all items must equal details.subTotal
        //NOTE: example only shows a single item, but you can have more than one
        details.invoiceData.invoiceItems = [NSMutableArray array];
        PayPalInvoiceItem *item = [[PayPalInvoiceItem alloc] init];
        item.totalPrice = details.subTotal;
        [details.invoiceData.invoiceItems addObject:item];

        [payment.receiverPaymentDetails addObject:details];
    }

    [[PayPal getPayPalInst] advancedCheckoutWithPayment:payment];

谁能告诉我如何进行这种转换？

提前致谢和问候。

Answer 1

在我的情况下，我必须实现这样的事情（适应您的需求）：

NSString *myStringObject = [NSString stringWithFormat:@"%u", someObject.hash];
NSUInteger hashValue = (NSUInteger)myStringObject.longLongValue;

我最初使用myStringObject.intValue ，如下所示，但随后我的整数被“剪裁”，因为它们在假定签名时太大（但由于额外的位而没有太大的无符号）。 使用myStringObject.longLongValue为我解决了问题。

我应该注意，我的字符串最初是使用NSUIntegers（无符号整数）创建的，所以我不必担心解析一个太大的整数。

Answer 2

假设你的数组中有一个字符串：

unsigned int order = (unsigned int)[[feeArray objectAtIndex:0] intValue];

确实没有NSString方法可以直接转换为unsigned int值。 但是，如果您可以保证您的所有值都不是签名的，那么上述内容应该对您有用。

Answer 3

没有转换为无符号整数，但是转换为有符号整数（ NSInteger ）：

NSInteger order = [[freeArray objectAtIndex:0] integerValue];
NSLog(@"order=%ld", order);

或int ：

int order = [[freeArray objectAtIndex:0] intValue];
NSLog(@"order=%d", order);