我将如何保存和加载 UITextField? [英] How would I save and load a UITextField?

问题描述

我到处搜索并尝试了很多代码，但似乎没有什么对我有用.我需要做的就是加载(在 viewDidLoad 上)一个文本字段并在按下按钮时保存它.

I have searched everywhere and tried lots of code but nothing seems to be working for me. All I need to do is to load (on viewDidLoad) a text field and save it when a button is pressed.

最简单的方法是什么?我正在使用单个窗口应用程序，我没有视图控制器(这可能会有所不同?)

What is the easiest method of doing this? I am working with a single window application, I don't have a view controller (this may make a difference?)

谢谢，

詹姆斯

推荐答案

使用 SQLite 数据库:

Using an SQLite database:

-(IBAction) checkNotes{

-(IBAction) checkNotes{

sqlite3_stmt *statement;

const char *dbpath = [databasePath UTF8String];

if (sqlite3_open(dbpath, &contactDB) == SQLITE_OK)
{
    NSString *querySQL = [NSString stringWithFormat: @"SELECT Notes FROM NotesTable WHERE UserID = ("%@")", userID.text]; 

    const char *query_stmt = [querySQL UTF8String];

    sqlite3_prepare_v2(contactDB, query_stmt, -1, &statement, NULL);

    if (sqlite3_step(statement) == SQLITE_ROW) {

        NSString *notesField = [[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)];

        Notes.text = notesField;

        [notesField release];

    }else{
        Status.text = @"Not found";

    }

    sqlite3_finalize(statement);
}
sqlite3_close(contactDB);    

}

您可以尝试一下，然后根据您的需要调整此代码.要实现 SQLite3，请查看网络.但我想它会在未来对你有很大帮助.我认为这将是最灵活的，因为它还允许您创建关系数据库.

You can play around a little bit and adapt this code to your needs. For implementing SQLite3, check the net. But it will help you much in the future I guess. I think it would be the most flexible, because it will also allow you to create relational databases.

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