我应该如何在iPhone项目中指定sqlite数据库的路径？

NSString *path = [[NSBundle mainBundle] pathForresource:@"yourDb" ofType:@"sqlite"];

但是您无法更改mainBundle中的文件.所以你必须将它复制到另一个位置.例如,您的应用程序库.

你可以这样做：

NSString *libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask,YES) lastObject];
NSString *targetPath = [libraryPath StringByAppendingPathComponent:@"yourDB.sqlite"];

if (![[NSFileManager defaultManager] fileExistsAtPath:targetPath]) {
    // database doesn't exist in your library path... copy it from the bundle
    NSString *sourcePath = [[NSBundle mainBundle] pathForresource:@"yourDb" ofType:@"sqlite"];
    NSError *error = nil;

    if (![[NSFileManager defaultManager] copyItemAtPath:sourcePath toPath:targetPath error:&error]) {
        NSLog(@"Error: %@",error);
    }
}