IOS Advanced 16th Day (0419)

0419 any view by default does not support multi-touch, there is a property setting Multiple Touch , set to Yes to support multi-touch Touch move a view, let view also follow the code

Some explanations about touch:

Note: touchescancelled:withevent: The method may be the result of a touch view missing.

Based on the Tapcount property of touch, the user is judged by how many times it has been pressed. Apple's official App Store AppStore the 9-time erase cache on any menu in the Tabbar. This method is used. For example:

Call

1. Call directly

2. Ask before calling: (the benefit is to return to the page before the app initiates the call after hanging up the phone)

Note that this is an Apple private API that is not allowed to be used, otherwise it will be rejected on the shelves

But it can also be done in other ways, as shown in:

Or as follows:

IOS Advanced 16th Day (0419)