Uialertcontroller class--alert Frame 2 (destructive "warning")

First, the effect

Second, the realization

-(void) Touchesbegan: (Nsset<uitouch *> *) touches withevent: (Uievent *) event

{

[Self alertTest2];

}

/**

* Destructive: "alert" style

*/

-(void) AlertTest2

{

1. Create Uialertcontroller

Uialertcontroller *alertcontroller = [Uialertcontroller

alertcontrollerwithtitle:@ "title"

message:@ "This is the default style for Uialertcontroller"

Preferredstyle:uialertcontrollerstylealert];

2. Create a Uialertaction instance

/**

button for "alert" style: red button for actions that may change or delete data

*/

Uialertaction *destructiveaction = [uialertaction actionwithtitle:@ "reset" style:uialertactionstyledestructive handler : ^ (uialertaction * _nonnull action) {

}];

Uialertaction *cancelaction = [uialertaction actionwithtitle:@ "Cancel" Style:uialertactionstylecancel handler:^ ( Uialertaction * _nonnull action) {

}];

3.UIAlertAction instance added to Uialertcontroller

[Alertcontroller addaction:destructiveaction];

[Alertcontroller addaction:cancelaction];

4. Display the dialog View Controller

[Self Presentviewcontroller:alertcontroller animated:yes completion:^{

}];

}

Uialertcontroller class--alert Frame 2 (destructive "warning")