在Objective c中将NSData转换为NSString [英] Converting NSData to NSString in Objective c

问题描述

我想将NSData转换为NSString ..最好的方法是什么？

I want to convert NSData to NSString..What is the best way to do this?

我正在使用此代码，但最终字符串返回null

I am using this code but the final string returns null

NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"%@",str);

当我看到控制台它将打印为空。

When I see console It will print null.

推荐答案

NSString 的文档说

https://developer.apple.com/documentation/foundation/nsstring/1416374-initwithdata

返回值通过使用$ b $将
数据中的字节转换为Unicode字符来初始化NSString对象
b编码。返回的对象可能与原始接收器的
不同。
如果初始化
由于某种原因失败，则返回nil（例如，如果
数据不代表
编码的有效数据）。

Return Value An NSString object initialized by converting the bytes in data into Unicode characters using encoding. The returned object may be different from the original receiver. Returns nil if the initialization fails for some reason (for example if data does not represent valid data for encoding).

你应该尝试其他编码来检查它是否能解决你的问题

You should try other encoding to check if it solves your problem

 // The following constants are provided by NSString as possible string encodings.
enum {
   NSASCIIStringEncoding = 1,
   NSNEXTSTEPStringEncoding = 2,
   NSJapaneseEUCStringEncoding = 3,
   NSUTF8StringEncoding = 4,
   NSISOLatin1StringEncoding = 5,
   NSSymbolStringEncoding = 6,
   NSNonLossyASCIIStringEncoding = 7,
   NSShiftJISStringEncoding = 8,
   NSISOLatin2StringEncoding = 9,
   NSUnicodeStringEncoding = 10,
   NSWindowsCP1251StringEncoding = 11,
   NSWindowsCP1252StringEncoding = 12,
   NSWindowsCP1253StringEncoding = 13,
   NSWindowsCP1254StringEncoding = 14,
   NSWindowsCP1250StringEncoding = 15,
   NSISO2022JPStringEncoding = 21,
   NSMacOSRomanStringEncoding = 30,
   NSUTF16StringEncoding = NSUnicodeStringEncoding,
   NSUTF16BigEndianStringEncoding = 0x90000100,
   NSUTF16LittleEndianStringEncoding = 0x94000100,
   NSUTF32StringEncoding = 0x8c000100,
   NSUTF32BigEndianStringEncoding = 0x98000100,
   NSUTF32LittleEndianStringEncoding = 0x9c000100,
   NSProprietaryStringEncoding = 65536
};

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