NSString到UInt64

Question

你怎么转换NSString成UInt64？

例如,如果UInt64Value存在辅助方法,则类似这样的事情:

NSString *value = @"1234567";
UInt64 convertedValue = [value UInt64Value];

我想在iOS项目中这样做.

Answer 1

为完整性提供另一种可能性:

NSScanner *scanner = [NSScanner scannerWithString:value];
unsigned long long convertedValue = 0;
[scanner scanUnsignedLongLong:&convertedValue];
return convertedValue;

... scanUnsignedLongLong如果要区分查找值0和查找不是数字​​的内容,请检查结果.

Answer 2

NSString * num = @"123456";

NSNumberFormatter * numberFormatter = [[NSNumberFormatter alloc]init];
NSNumber *  number = [numberFormatter numberFromString:num];
unsigned long long valueUInt64 = number.unsignedLongLongValue;