iOS 开发之 16进制转换

来源：互联网发布：卖图片知乎编辑：程序博客网时间：2024/06/01 14:12

方法一：

IOS 十进制转十六进制

NSString *hexString = [NSString stringWithFormat:@"%@",[[NSString alloc] initWithFormat:@"%1x",整形参数]];

方法二：

// 16进制转换

- (void)transPassToHex{

pwdToHex = @"";

int length = [loginBookPassword length];

for(int i = 0; i < length; i++){

NSRange range = NSMakeRange(i, 1);

NSString * str = [loginBookPassword substringWithRange:range];

// 转换位ascii码整数

int asciiCode = [str characterAtIndex:0];

[self transAsciiToHex:asciiCode];

}

//BOL_HexPassword = [[NSString alloc]initWithString:tranBuffer];

NSLog(@"pwdToHex===%@",pwdToHex);

}

- (void)transAsciiToHex:(int) asciiCode{

int n = asciiCode / 16;

int e = asciiCode % 16;

if (n > 16) {

[self transAsciiToHex : n];

}else{

if (n >= 10) {

[self transToEn: n];

}else if(n > 0){

pwdToHex = [pwdToHex stringByAppendingFormat:@"%d",n];

}

if (e >= 10) {

[self transToEn: e];

}else{

pwdToHex = [pwdToHex stringByAppendingFormat:@"%d",e];

}

- (void)transToEn:(int) e{

switch (e) {

case 10:

pwdToHex = [pwdToHex stringByAppendingString:@"A"];

break;

case 11:

pwdToHex = [pwdToHex stringByAppendingString:@"B"];

break;

case 12:

pwdToHex = [pwdToHex stringByAppendingString:@"C"];

break;

case 13:

pwdToHex = [pwdToHex stringByAppendingString:@"D"];

break;

case 14:

pwdToHex = [pwdToHex stringByAppendingString:@"E"];

break;

case 15:

pwdToHex = [pwdToHex stringByAppendingString:@"F"];

break;

default:

break;

}

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