Question

我有正确的导航栏按钮操作，我为它设置了一个操作，如下所示：

-(IBAction)save:(id)sender
{
    //Code for saving entered data

    UITextField *fieldOne = [self.fields objectAtIndex:0];
    UITextField *fieldTwo = [self.fields objectAtIndex:1];
    UITextField *fieldThree = [self.fields objectAtIndex:2]; 

    sqlite3_stmt *statement;
    const char *dbpath = [databasePath UTF8String];

    if (sqlite3_open(dbpath, &remindersDB) == SQLITE_OK && textField.text != nil)
    {

        NSString *insertSQL = [NSString stringWithFormat:@"INSERT INTO reminders(name, event, date) VALUES (\"%@\", \"%@\", \"%@\")", fieldOne.text, fieldTwo.text,fieldThree.text];

        const char *insert_stmt = [insertSQL UTF8String];

        sqlite3_prepare_v2(remindersDB, insert_stmt, -1, &statement, NULL);

        NSLog(@"%@",fieldOne.text);
        NSLog(@"%@",fieldTwo.text);
        NSLog(@"%@",fieldThree.text);

        if (sqlite3_step(statement) == SQLITE_DONE)
        {
            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"\n Reminder Saved." message:nil delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];
            [alert show];
            [alert dismissWithClickedButtonIndex:0 animated:YES];
            [alert release];
        } 

        else 
        {
            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Alert" message:@"Reminder not saved" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
            [alert show];
            [alert release];
        }

        rowID = sqlite3_last_insert_rowid(remindersDB);
        NSLog(@"last inserted rowId = %d",rowID);

        sqlite3_finalize(statement);
        sqlite3_close(remindersDB);

    }

    //Alert for not entering any data

    if ([textField.text length] == 0)
    {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Fill Data" message:@"Please fill name,event and date of reminder" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
        [alert show];
        [alert release];
    }

    ++self.numberOfSaves;
    NSLog(@"Number of saves = %d",numberOfSaves);

    [self.tableView reloadData];

}

Now I want to check how many times the button is clicked,I have an idea in mind that to create a function and used the condition 

    -(int)numberOfSaves
    {

    int saves = 0;

    if(self.navigationItem.rightBarButtonItem.enabled==YES)
    {

          saves++;

    }
       return saves;
    }

它不起作用......

有没有检查这种情况，如果是这样我怎么能实现它，我是objective-c的新手，请帮帮我...

提前感谢所有人：）

Answer 1

您无法从void方法返回。

您希望将-(void)numberOfSaves更改为-(int)numberOfSaves，如果这是正确的方法，但我认为这不是您想要的。

在头文件（.h）中，您需要为类声明一个实例变量：

@property (nonatomic, strong) NSInteger numberOfSaves;

在您的实现文件（.m）中，请确保合成它：

@synthesize numberOfSaves = _numberOfSaves;

替换IBAction方法：

- (IBAction)save:(id)sender
{
    ++self.numberOfSaves;
}

然后将-(void)numberOfSaves方法全部丢弃。这应该完成我认为你想要做的事情。您可以使用self.numberOfSaves

计算出现在提交的保存数量

如何访问或调用函数中的操作

1 个答案: