NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);//使用C函数NSSearchPathForDirectoriesInDomains来获得沙盒中目录的全路径。
// *** NSString * documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *ourDocumentPath =[documentPaths objectAtIndex:0];
NSString *sandboxPath = NSHomeDirectory();
// NSString *documentPath = [sandboxPath stringByAppendingPathComponent:@"Purchase.app"];//将Documents添加到sandbox路径上//stringByAppendingPathComponent
NSString *FileName=[ourDocumentPath stringByAppendingPathComponent:_fileName];//fileName就是保存文件的文件名
NSLog(FileName);
NSFileManager *fileManager = [NSFileManager defaultManager];
// Copy the database sql file from the resourcepath to the documentpath
if ([fileManager fileExistsAtPath:FileName])
{
return FileName;
}else
{
NSURL *url = [NSURL URLWithString:fileUrl];
NSData *data = [NSData dataWithContentsOfURL:url];
[data writeToFile:FileName atomically:YES];//将NSData类型对象data写入文件，文件名为FileName
}
return FileName;