Uialertcontroller Tai Hang

When using Uialertcontroller in the project, it was found that there was no way to cancel the control at the click of the space, the gesture was not recognized, and a unique Cancel button must be added when the control was used. That is, there must be a button of type Uialertactionstylecancel. If there are 2 items that will cause an error, if not, click on the blank control to not disappear.

Uialertcontroller *Alertcontroller = [Uialertcontroller alertcontrollerwithtitle:@ " Change Type " Message:nil Preferredstyle:uialertcontrollerstyleactionsheet];

[Alertcontroller addaction:[uialertaction actionwithtitle:@"Redeem"Style:uialertactionstyledefault handler:^ (Uialertaction *_nonnull Action) {NSLog (@"Click to confirm");        }]]; [Alertcontroller addaction:[uialertaction Actionwithtitle:@"return"Style:uialertactionstylecancel handler:^ (Uialertaction *_nonnull Action) {NSLog (@"Click to confirm");    }]]; //as it is a controller directly modal out just fine[self Presentviewcontroller:alertcontroller animated:yes completion:nil];

Uialertcontroller Tai Hang