1.蓝牙命令写入数据格式转换：
- (NSMutableData*)convertHexStrToData:(NSString*)str{
if(!str || [strlength] ==0) {
returnnil;
}
NSMutableData *hexData = [[NSMutableData alloc] initWithCapacity:8];
NSRangerange;
if([strlength] %2==0) {
range =NSMakeRange(0,2);
}else{
range =NSMakeRange(0,1);
}
for(NSIntegeri = range.location; i < [strlength]; i +=2) {
unsignedintanInt;
NSString*hexCharStr = [strsubstringWithRange:range];
NSScanner*scanner = [[NSScanneralloc]initWithString:hexCharStr];
[scannerscanHexInt:&anInt];
NSData *entity = [[NSData alloc] initWithBytes:&anInt length:1];
[hexDataappendData:entity];
range.location+= range.length;
range.length=2;
}
returnhexData;
}
2.蓝牙数据解析：
- (NSString*)hexStringFromData:(NSData*)myD{
Byte*bytes = (Byte*)[myDbytes];
//下面是Byte 转换为16进制。
NSString*hexStr=@"";
for(inti=0;i<[myDlength];i++){
NSString*newHexStr = [NSStringstringWithFormat:@"%x",bytes[i]&0xff];///16进制数
if([newHexStrlength]==1)
hexStr = [NSStringstringWithFormat:@"%@0%@",hexStr,newHexStr];
else
hexStr = [NSStringstringWithFormat:@"%@%@",hexStr,newHexStr];
}
NSLog(@"hex = %@",hexStr);
returnhexStr;
}
