[super viewDidLoad];      // 获取App的Sandbox路径      NSString *sandboxPath = NSHomeDirectory();      NSLog(@"%@",sandboxPath);      //获取Documents路径      NSString *doc = [sandboxPath stringByAppendingPathComponent:@"Documents"];      NSLog(@"doc:%@",doc);      //另一种获取Documents路径的方式      NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);      NSString *doc1 = [paths firstObject];      NSLog(@"Doc:%@",doc1);            //获取Library的路径      NSString *lib = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) firstObject];      NSLog(@"%@",lib);             //获取Library下的Caches目录      NSString *caches = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)firstObject];      NSLog(@"Caches:%@",caches);             //获取临时目录下tmp      NSString *tmp = NSTemporaryDirectory();      NSLog(@"tmp:%@",tmp);             //如何获取应用程序本身的路径      NSBundle *mainBundle = [NSBundle mainBundle];//mainBundle 对象代表应用程序本身的内容      NSString *path = [mainBundle pathForResource:@"a" ofType:@"jpg"];      NSLog(@"%@",path);      //获取Url      NSURL *url = [mainBundle URLForResource:@"a" withExtension:@"jpg"];      NSLog(@"url:%@",url);