iOS获取沙盒路径方法

 //1.获取沙盒数据容器根目录
    NSString *homePath = NSHomeDirectory();
    NSLog(@"home根目录:%@", homePath);
 //2.获取Documents路径
    /*参数一：指定要搜索的文件夹枚举值
      参数二：指定搜索的域Domian: NSUserDomainMask
      参数三：是否需要绝对/全路径：NO：波浪线~标识数据容器的根目录; YES(一般制定): 全路径
     */
     NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSLog(@"documens路径:%@", documentPath);
//3.获取Library路径
    NSString *libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];
    NSLog(@"libaray路径:%@", libraryPath);
//4.获取tmp路径
    NSString *tmpPath = NSTemporaryDirectory();
    NSLog(@"tmp路径：%@", tmpPath);

另一种方法

NSString *documents = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
    //拼接文件绝对路径
    NSString *path = [documents stringByAppendingPathComponent:@"header.png"];