objective-c – 无法访问NSTask启动路径.适用于Xcode. XCode显示错误

代码非常简单.创建一个新的空Mac OSX项目,然后将以下代码粘贴到applicationDidFinishLaunching：方法中.它应该获取任何可执行文件的路径(在本例中为GIT).

NSTask *aTask = [[NSTask alloc] init];
NSPipe *outputPipe = [NSPipe pipe];
NSPipe *errorPipe = [NSPipe pipe];

[aTask setStandardOutput: outputPipe];
[aTask setStandardError: errorPipe];
[aTask setArguments:[NSArray arrayWithObject:@"which"]];
[aTask setLaunchPath:@"/usr/bin/git"];

NSFileHandle *outputFileHandler = [outputPipe fileHandleForReading];
NSFileHandle *errorFileHandler = [errorPipe fileHandleForReading];

[aTask launch];
[aTask waitUntilExit];

// Task launched Now just read and print the data
NSData *data = [outputFileHandler readDataToEndOfFile];
NSString *outPutValue = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];

NSData *errorData = [errorFileHandler readDataToEndOfFile];
NSString *errorValue = [[NSString alloc] initWithData:errorData encoding:NSUTF8StringEncoding];

NSLog(@"Error value: %@",errorvalue);
NSLog(@"Output Value: %@",outPutvalue);

这段代码设置了两个读取管道并运行一个命令：git.

如果我在xcode中运行它,我会得到相应的结果：

Error value: ""  
Output Value: /usr/bin/git

如果我转到我的build / Products / Debug文件夹并双击可执行文件,我会在控制台应用程序上打印此消息：

问：那么,这里的问题到底是什么？请不要做出替代解决方案……我也想知道问题是什么..谢谢.

解决方法

[task setLaunchPath:@"/bin/bash"];
NSArray *args = [NSArray arrayWithObjects:@"-l",@"-c",@"which git",//Assuming git is the launch path you want to run
                 nil];
[task setArguments: args];

NSDictionary *environmentDict = [[NSProcessInfo processInfo] environment];
NSString *sHellString = [environmentDict objectForKey:@"SHelL"];