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我需要使用 UInt8 数组,但我不确定如何正确执行此操作...

这是我的代码:

@interface MyClass : NSObject {
    __strong id * myArray; //private byte[] myArray;  <- Java code
}
@property   (nonatomic,readwrite) __strong id * myArray;
@end

这是 MyClass 中的一个方法:

-(int) getArray: (__strong id *) bufferTmp {

    NSString* aString = @"theString";
    int bytes  = aString.length;

    //now I need to fill the passed in array with the chars of the String
    for (int i = 0; i < bytes; i++) {
            char c = [aString characterAtIndex:i];
            ??? bufferTmp[i] = (UInt8)c;   <----- what to write here?
        }
return bytes;
}

这就是我计划调用此方法来填充 myBuffer 的方式:

UInt8 myBuffer[10000];
[xxx read: myBuffer];       <-      how to do this correctly ?????

这是等效的工作 Java 代码:

public int getArray(byte[] bufferTmp) {
    String theString = "theString";
    for (int i = 0; i < bytes; i++) {
        char c = theString.charAt(i);
        bufferTmp[i] = (byte) c;
        }
     return bytes;

 }

这就是我在 Java 中调用此方法的方式:

 byte[] myBuffer = new byte[10000]; 
 int n = read(myBuffer);
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1 回答 1

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在 Objective-C 中,您可以使用NSData对象作为字节缓冲区,并dataUsingEncoding获得字符串的字节表示:

NSString *aString = @"theString";
NSData *myBuffer = [aString dataUsingEncoding:NSUTF8StringEncoding];

const char *bytes = [myBuffer bytes]; // pointer to the bytes in the buffer
NSUInteger count = [myBuffer length]; // number of bytes in the buffer
于 2013-02-20T19:21:44.057 回答