App中常用的几个目录如何获取

 1 /// Home 2 NSString *homeDir = NSHomeDirectory(); 3      4 /// Home > Documents 5 NSString *documentsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]; 6      7 /// Home > Library 8 NSString *libraryDir = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) firstObject]; 9     10 /// Home > Library > Caches11 NSString *cachesDir = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject];12     13 /// Home > tmp14 NSString *tmpDir = NSTemporaryDirectory();