'%' is a function word in Objective C, such as '%d" to print a number, How to print a '%' in a string? that is easy, just '%%' Codeself.txtPercent.text=  [NSString stringWithFormat:@"%d%%", (int)sender.value]; more »

if you only have an ok button for alert view, that is easy. However, if you have more than an "OK" button, you need to implement your controller as UIAlertViewDelegate For example: Code@interface TipRecordListViewController :… more »

I tried to build another logic flow in story board after the add button clicked. This is easy. Please add them in the main view controller. AddTipRecordViewController *labelEntryViewController = [self.storyboard instantiateViewControllerWithIde… more »

Building a data layer in sqlite for android is a bit of time consuming. Recently, we have moved to the IOS world. I found that is a bit easier to build in data layer in there. It has Core data concept which is a kind of ORM. But that is completely OOP s… more »

We started to build ios app again. But I drop iAd banner on the panel and run the app. I got this error "Could not instantiate class named ADBannerView". Well, that is a silly mistake. I just forgot going the project and add iAd.framework at Linked fra… more »