ios 将 NSDecimalNumber 转换为 NSString
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Converting NSDecimalNumber to NSString
提问by 4thSpace
I'm retrieving a key from an object that looks like this:
我正在从如下所示的对象中检索密钥：
po obj
{
TypeID = 3;
TypeName = Asset;
}
The key value is being retrieved like this:
正在检索键值，如下所示：
NSString *typeId = (NSString*)[obj objectForKey:@"TypeID"];
Rather than typeId being an NSString, it is an NSDecimalNumber. Why is that?
typeId 不是 NSString，而是 NSDecimalNumber。这是为什么？
How do I convert it to an NSString?
如何将其转换为 NSString？
回答by Jeff B
You need to use the stringWithFormatfunction:
您需要使用该stringWithFormat功能：
NSString *typeId = [NSString stringWithFormat:@"%@", [obj objectForKey:@"TypeID"]];
or stringValue:
或stringValue：
NSString *typeId = [[obj objectForKey:@"TypeID"] stringValue];
回答by Michael
This should work:
这应该有效：
NSString *typeId = [[obj objectForKey:@"TypeID"] stringValue];
回答by Cao Huu Loc
If you want to get string value, just use "description". It works fine even if returned type is NSDecimalNumber, or NSString, or whatever:
如果您想获取字符串值，只需使用“描述”。即使返回类型是 NSDecimalNumber、NSString 或其他类型，它也能正常工作：
NSString *typeId = [[obj objectForKey:@"TypeID"] description];
回答by blwinters
Since this is the top search result and I don't see a question for NSDecimalNumber to String in Swift, here it is. This will show the localized decimal separator and all decimal places with a non-zero value.
由于这是最热门的搜索结果，而且我在 Swift 中没有看到 NSDecimalNumber 到 String 的问题，所以在这里。这将显示本地化的小数点分隔符和所有具有非零值的小数位。
let string = decimalNumber.description(withLocale: Locale.current)
let string = decimalNumber.description(withLocale: Locale.current)
回答by taus-iDeveloper
Use this to convert NSDecimalNumber to NSString:
使用此NSDecimalNumber转换成的NSString：
NSDecimalNumber* dec1;
NSString* str;
str = dec1.stringValue;
Use this to convert NSString to NSDecimalNumber:
用这个来的NSString转换为NSDecimalNumber：
NSString* string1 = @"Stack overflow 123";
NSDecimalNumber* dec;
dec = (NSDecimalNumber *)string1;
