IOS蓝牙数据转换10进制16进制 int NSData Str
//NSdata 转16进制字符串
- (NSString*)hexRepresentationWithSpaces_AS:(BOOL)spaces withData:(NSData *)data
{
const unsigned char* bytes = (const unsigned char*)[data bytes];
NSUInteger nbBytes = [data length];
//If spaces is true, insert a space every this many input bytes (twice this many output characters).
static const NSUInteger spaceEveryThisManyBytes = 4UL;
//If spaces is true, insert a line-break instead of a space every this many spaces.
static const NSUInteger lineBreakEveryThisManySpaces = 4UL;
const NSUInteger lineBreakEveryThisManyBytes = spaceEveryThisManyBytes * lineBreakEveryThisManySpaces;
NSUInteger strLen = 2*nbBytes + (spaces ? nbBytes/spaceEveryThisManyBytes : 0);
NSMutableString* hex = [[NSMutableString alloc] initWithCapacity:strLen];
for(NSUInteger i=0; i<nbBytes;){
[hex appendFormat:@"%02X", bytes[i]];
//We need to increment here so that the every-n-bytes computations are right.
++i;
if (spaces) {
if (i % lineBreakEveryThisManyBytes == 0) [hex appendString:@":"];
else if (i % spaceEveryThisManyBytes == 0) [hex appendString:@":"];
}
}
return hex;
}
//NSdata 转16进制字符串
- (NSString*)hexRepresentationWithSymbol:(NSString *)symbol withData:(NSData *)data
{
const unsigned char* bytes = (const unsigned char*)[data bytes];
NSUInteger nbBytes = [data length];
//If spaces is true, insert a space every this many input bytes (twice this many output characters).
//static const NSUInteger spaceEveryThisManyBytes = 4UL;
//If spaces is true, insert a line-break instead of a space every this many spaces.
//static const NSUInteger lineBreakEveryThisManySpaces = 4UL;
//const NSUInteger lineBreakEveryThisManyBytes = spaceEveryThisManyBytes * lineBreakEveryThisManySpaces;
NSUInteger strLen = 2*nbBytes;
NSMutableString* hex = [[NSMutableString alloc] initWithCapacity:strLen];
for(NSUInteger i=0; i<nbBytes;) {
[hex appendFormat:@"%02X%@", bytes[i], symbol];
//We need to increment here so that the every-n-bytes computations are right.
++i;
}
[hex deleteCharactersInRange:NSMakeRange(hex.length - 1, 1)];
return hex;
}
#pragma mark - 字符串与字符串之间转换
//十六进制数字字符串转换为10进制数字字符串的。
- (NSString *)hexNumberStringToNumberString:(NSString *)hexNumberString{
unsigned int value = 0;
NSScanner *scanner = [NSScanner scannerWithString:hexNumberString];
[scanner setScanLocation:0];
[scanner scanHexInt:&value];
return [NSString stringWithFormat:@"%d",value];
}
//十进制数字字符串转换为16进制数字字符串的。
- (NSString *)numberStringToHexNumberString:(NSString *)numberString{
return [NSString stringWithFormat:@"%x",[numberString intValue]];
}
// 十六进制转换为普通字符串的。
- (NSString *)stringFromHexString:(NSString *)hexString
{
char *myBuffer = (char *)malloc((int)[hexString length] / 2 + 1);
bzero(myBuffer, [hexString length] / 2 + 1);
for (int i = 0; i < [hexString length] - 1; i += 2) {
unsigned int anInt;
NSString * hexCharStr = [hexString substringWithRange:NSMakeRange(i, 2)];
NSScanner * scanner = [[NSScanner alloc] initWithString:hexCharStr];
[scanner scanHexInt:&anInt];
myBuffer[i / 2] = (char)anInt;
}
NSString *unicodeString = [NSString stringWithCString:myBuffer encoding:NSUTF8StringEncoding];
return unicodeString;
}
//普通字符串转换为十六进制的。
- (NSString *)hexStringFromString:(NSString *)string
{
NSData *myD = [string dataUsingEncoding:NSUTF8StringEncoding];
Byte *bytes = (Byte *)[myD bytes];
//下面是Byte 转换为16进制。
NSString *hexStr=@"";
for(int i=0;i<[myD length];i++)
{
NSString *newHexStr = [NSString stringWithFormat:@"%x",bytes[i]&0xff];///16进制数
if([newHexStr length]==1)
hexStr = [NSString stringWithFormat:@"%@0%@",hexStr,newHexStr];
else
hexStr = [NSString stringWithFormat:@"%@%@",hexStr,newHexStr];
}
return hexStr;
}
#pragma mark - Dictionary 转 Json String
-(NSString *)dictionaryToJsonStr:(id)dic
{
if (dic==nil) {
return nil;
}
NSError *error = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic
options:NSJSONWritingPrettyPrinted
error:&error];
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
jsonString = [jsonString stringByReplacingOccurrencesOfString:@"\n" withString:@""];
jsonString = [jsonString stringByReplacingOccurrencesOfString:@" " withString:@""];
//NSLog(@"JSON String = %@", jsonString);
return jsonString;
}
