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如何将NSString值转换为NSData？

iosobjective-cnsstringnsdata
950

如何将NSString类型的值转换为NSData类型？

14个回答
4

Swift:

Swift 5.x

let myStringToConvert = "My String to Convert in Data"
let myData = myStringToConvert.data(using: .utf8)

字符串转换为数据：

var myStringToConvert = "My String to Convert in Data"
var myData = myStringToConvert.data(using: String.Encoding.utf8)

数据转字符串：

var backToMyString = String(data: myData!, encoding: String.Encoding.utf8) as String!
OBJECTIVE C:

将NSString转换为NSData：

NSString* myStringToConvert= @"My String to Convert in Data";
NSData* myData=[str dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];

NSData 转换为 NSString:

NSString* backToMyString = [[NSString alloc] initWithData: myData encoding:NSUTF8StringEncoding];
1
NSString *str = @"Banana";
NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:true];
0

Objective-C

NSString *str = @"Hello World";
NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];

Swift

let str = "Hello World"
let data = string.data(using: String.Encoding.utf8, allowLossyConversion: false)
0
在Swift中有一个API，它返回一个非可选类型。
let str = "teststring"
let data = Data(str.utf8)
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