iOS开发进制转换
2024-08-24 20:58:08
1、十进制转换为二进制
/**
十进制转换为二进制
@param decimal 十进制数
@return 二进制数
*/
+ (NSString *)getBinaryByDecimal:(NSInteger)decimal {
NSString *binary = @"";
while (decimal) {
binary = [[NSString stringWithFormat:@"%ld", decimal % 2] stringByAppendingString:binary];
if (decimal / 2 < 1) {
break;
}
decimal = decimal / 2 ;
}
if (binary.length % 4 != 0) {
NSMutableString *mStr = [[NSMutableString alloc]init];
for (int i = 0; i < 4 - binary.length % 4; i++) {
[mStr appendString:@"0"];
}
binary = [mStr stringByAppendingString:binary];
}
return binary;
}
2、十进制转换为十六进制
/**
将十进制转化为十六进制
@param decimal 10进制 int类型
@return 16进制
*/
+ (NSString*)changDecimalToHex:(NSInteger)decimal {
NSString* intDecimalStr = [[NSString alloc] initWithFormat:@"%1lx", (long)decimal];
NSString* hexString = [NSString stringWithFormat:@"%@", intDecimalStr];
if (hexString.length == 5) {
return [[NSString stringWithFormat:@"0%@", hexString] uppercaseString];
} else {
return [hexString uppercaseString];
}
}
3、 二进制转换为十六进制
/**
二进制转换成十六进制
@param binary 二进制数
@return 十六进制数
*/
+ (NSString *)getHexByBinary:(NSString *)binary {
NSMutableDictionary *binaryDic = [[NSMutableDictionary alloc] initWithCapacity:16];
[binaryDic setObject:@"0" forKey:@"0000"];
[binaryDic setObject:@"1" forKey:@"0001"];
[binaryDic setObject:@"2" forKey:@"0010"];
[binaryDic setObject:@"3" forKey:@"0011"];
[binaryDic setObject:@"4" forKey:@"0100"];
[binaryDic setObject:@"5" forKey:@"0101"];
[binaryDic setObject:@"6" forKey:@"0110"];
[binaryDic setObject:@"7" forKey:@"0111"];
[binaryDic setObject:@"8" forKey:@"1000"];
[binaryDic setObject:@"9" forKey:@"1001"];
[binaryDic setObject:@"A" forKey:@"1010"];
[binaryDic setObject:@"B" forKey:@"1011"];
[binaryDic setObject:@"C" forKey:@"1100"];
[binaryDic setObject:@"D" forKey:@"1101"];
[binaryDic setObject:@"E" forKey:@"1110"];
[binaryDic setObject:@"F" forKey:@"1111"];
if (binary.length % 4 != 0) {
NSMutableString *mStr = [[NSMutableString alloc]init];;
for (int i = 0; i < 4 - binary.length % 4; i++) {
[mStr appendString:@"0"];
}
binary = [mStr stringByAppendingString:binary];
}
NSString *hex = @"";
for (int i=0; i<binary.length; i+=4) {
NSString *key = [binary substringWithRange:NSMakeRange(i, 4)];
NSString *value = [binaryDic objectForKey:key];
if (value) {
hex = [hex stringByAppendingString:value];
}
}
return hex;
}
4、十六进制转二进制
/**
十六进制转换为二进制
@param hexString 十六进制数
@return 二进制数
*/
+ (NSString *)getBinaryByHexString:(NSString *)hexString {
NSMutableDictionary *hexDic = [[NSMutableDictionary alloc] initWithCapacity:16];
[hexDic setObject:@"0000" forKey:@"0"];
[hexDic setObject:@"0001" forKey:@"1"];
[hexDic setObject:@"0010" forKey:@"2"];
[hexDic setObject:@"0011" forKey:@"3"];
[hexDic setObject:@"0100" forKey:@"4"];
[hexDic setObject:@"0101" forKey:@"5"];
[hexDic setObject:@"0110" forKey:@"6"];
[hexDic setObject:@"0111" forKey:@"7"];
[hexDic setObject:@"1000" forKey:@"8"];
[hexDic setObject:@"1001" forKey:@"9"];
[hexDic setObject:@"1010" forKey:@"A"];
[hexDic setObject:@"1011" forKey:@"B"];
[hexDic setObject:@"1100" forKey:@"C"];
[hexDic setObject:@"1101" forKey:@"D"];
[hexDic setObject:@"1110" forKey:@"E"];
[hexDic setObject:@"1111" forKey:@"F"];
NSString *binary = @"";
for (int i = 0; i < [hexString length]; i++) {
NSString *key = [hexString substringWithRange:NSMakeRange(i, 1)];
NSString *value = [hexDic objectForKey:key.uppercaseString];
if (value) {
binary = [binary stringByAppendingString:value];
}
}
return binary;
}
5、十六进制转十进制
/**
将十六进制转化为十进制
@param hexString 16进制 nsstring类型
@return 10进制
*/
+ (NSInteger)changHexToDecimal:(NSString*)hexString {
NSString* temp10 = [NSString stringWithFormat:@"%lu", strtoul([hexString UTF8String], 0, 16)];
int cycleNumber = [temp10 intValue];
return cycleNumber;
}
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