I'm creating a calculator app, mostly for my own amusement. My design is - The UILabels on the left are stacked: FIRST, LAST, DIFF. The input/displays are on the right. The input/displays of each corresponding value are also UILabels. Over the label are UIButtons (set to zero alpha), one for each unit. One tap on a button lets the user enter a value for the display. Double tap lets the user enter only the unit that the user tapped upon. (That is, if the display is 1234, and the user taps once on the 2, the keyboard will display 1234, and the user inputs away. If the user double taps on the 2, the keyboard will display 2, and the user can change only it.) The user can also drag a value from one display into another. This list goes on and on, but the important part is the one tap, two taps.
At first, I thought I use UIKit to drag connectors to my IBAction methods. Some of these (will) parse the text out of the input/displays, take the user's input, concatenate the result and after closing the keyboard, displays the corrected input. It seemed simple thinking - drag the UIButton tag for one tap to the one tap method, drag the tag for two taps to the two tap method, so it was quite a surprise to start setting up the connections, and find there isn't a tag for TAP or 2TAPS, but instead the list below. Did End On Exit Editing Changed Editing Did Begin Editing Did End Touch Cancel Touch Down Touch Down Repeat Touch Drag Enter Touch Drag Exit Touch Drag Inside Touch Drag Outside Touch Up Inside Touch Up Outside Value Changed So, fine I think. I'll have to write code that gets armed with a Touch Down or Touch Down Repeat, and fired if Touch Up Inside also happens, else it will be a Touch Down followed by a Touch Drag of some kind, and then the imagined code started seeming very complicated. One thing I've learnt is that as soon as things start seeming very complicated, I'm probably overthinking things, and there is a simpler way of doing it that everybody else uses. My searching for answers brings up coding and coding examples from UITouch and UIEvent . I'm not finding anything that helps me understand UIKit connections from a UIButton in terms of TAP, TOUCH, DRAG etc, etc. If anyone could point me to a direct explanation, I'd be most grateful. Thank you, Ronald Ramage _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
