上一篇我写了在xcode里面添加run script来执行脚本，可是打包之后发现，只有用xcode运行的时候才会执行这个shell命令，查了很多资料，最后我觉得应该是我理解错了，这里的run script很可能只是为了方便自动化打包之类的场景适用，而并不是真正的运行时执行脚本。那该怎么实现呢？
参阅博客一
参阅博客二
参阅博客三

- (NSString *)cmd:(NSString *)cmd
{
    // 初始化并设置shell路径
    NSTask *task = [[NSTask alloc] init];
    [task setLaunchPath: @"/bin/bash"];
    // -c 用来执行string-commands（命令字符串），也就说不管后面的字符串里是什么都会被当做shellcode来执行
    NSArray *arguments = [NSArray arrayWithObjects: @"-c", cmd, nil];
    [task setArguments: arguments];
    
    // 新建输出管道作为Task的输出
    NSPipe *pipe = [NSPipe pipe];
    [task setStandardOutput: pipe];
    
    // 开始task
    NSFileHandle *file = [pipe fileHandleForReading];
    [task launch];
    
    // 获取运行结果
    NSData *data = [file readDataToEndOfFile];
    return [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
}

但是有一个问题，因为脚本是：

#!/bin/bash
rm -rf ~/Downloads/keystore.xml
#chmod -x write.sh
/usr/local/bin/adb pull /data/data/com.whatsapp/shared_prefs/keystore.xml ~/Downloads/keystore.xml
cat ~/Downloads/keystore.xml

adb需要管理员权限，所以一直提示没有权限执行脚本。

NSString *script =  [NSString stringWithFormat:@"do shell script \"%@\" with administrator privileges", fullScript];

查了一下资料，可以用with administrator privileges,这时候又报"用户名密码不正确"，不知道为啥，最终抛弃了NSTask,找到了这个库,它自动帮我们处理权限问题，最终：

- (void)runSTPrivilegedTask {
    NSString *cmd = @"/bin/sh launcher.sh";
    
    STPrivilegedTask *privilegedTask = [[STPrivilegedTask alloc] init];
    
    NSMutableArray *components = [[cmd componentsSeparatedByString:@" "] mutableCopy];
    NSString *launchPath = components[0];
    [components removeObjectAtIndex:0];
    
    [privilegedTask setLaunchPath:launchPath];
    [privilegedTask setArguments:components];
    [privilegedTask setCurrentDirectoryPath:[[NSBundle mainBundle] resourcePath]];
    
    // Set it off
    OSStatus err = [privilegedTask launch];
    if (err != errAuthorizationSuccess) {
        if (err == errAuthorizationCanceled) {
            NSLog(@"User cancelled");
            return;
        }  else {
            NSLog(@"Something went wrong: %d", (int)err);
            // For error codes, see http://www.opensource.apple.com/source/libsecurity_authorization/libsecurity_authorization-36329/lib/Authorization.h
        }
    }
    
    [privilegedTask waitUntilExit];
    
    // Success! Now, read the output file handle for data
    NSFileHandle *readHandle = [privilegedTask outputFileHandle];
    NSData *outputData = [readHandle readDataToEndOfFile]; // Blocking call
    NSString *outputString = [[NSString alloc] initWithData:outputData encoding:NSUTF8StringEncoding];
    //[self.outputTextField setString:outputString];
    NSLog(@"输出%@",outputString);
    
    NSString *exitStr = [NSString stringWithFormat:@"Exit status: %d", privilegedTask.terminationStatus];
    NSString *result = [[outputString componentsSeparatedByString:@"\"client_static_keypair\">"]  [1]  componentsSeparatedByString:@"</string>"][0];
      NSLog(@"输出臭豆腐的%@",exitStr);

            
    dic=[[NSMutableDictionary alloc] init];
    [dic setObject:[NSString stringWithFormat:@"%@==",result] forKey:@"client_static_keypair"];
            //  [dic setObject:[NSString stringWithFormat:@"%@==",parser.nodeDict[@"server_static_public"]] forKey:@"server_static_public"];
            // dic=parser.nodeDict;
             
          //   NSLog(@"-->%d",isYES);
        // }
     
    
}

按理说这样应该就没啥问题了，可是这是由又报someting went wrong:6005,又是一顿google，最终发现：

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