Objective c NSPATH控制集路径

我正在寻找一种将NSPathControl的路径设置为“~/Desktop”的方法。非常感谢。现在我想知道，如何获取所选路径的字符串。

[_pathControlOutlet setURL: [NSURL URLWithString: [@"~/Desktop"stringByExpandingTildeInPath] ]];


NSURL *pathURL = [_pathControlOutlet URL];
NSLog(@"%@",[[_pathControlOutlet URL]path]);

NSString *pathSegmentClicked = [[_pathControlOutlet clickedPathComponentCell]title];

NSLog(@"%@",pathSegmentClicked);
NSLog(@"%@",pathURL);

NSURL *pathURL = [NSURL fileURLWithPath:[@"~/Desktop stringByExpandingTildeInPath]];
[pathControl setURL:pathURL];