2019-03-12

Mac osx开发

nsopenpanel是什么，为什么要用到这个类, 打开一个选择文件的界面， 

NSOpenpanel *openpanel = [NSOpenpanel openpanel];

[openpanel runmodal]; 打开界面

NSUrl *url = openpanel.url. //url the file you choose

task.currenturl = url。// 

[task setargument]

[task setlaunchpath]

[task setstandout]

[task launch]

[task waituntilexit]

nsdata *data = [outpipe filehandleforreading] availabledata];

[outpipe filehandleforreading] readinbackgroundnotify];

NSString *str =[ [nsstring alloc] initwithdata:data encoding:nsutf8stringencoding];