Self-learning iOS development small function Three: the two ways of the frame (iOS8.3 after the new way, previously deprecated)

1, the frame appears in the middle of the screen position

Uialertcontroller *alert = [Uialertcontroller alertcontrollerwithtitle:@"Tips"Message@"whether to exit"Preferredstyle:uialertcontrollerstylealert]; [Alert addaction:[uialertaction Actionwithtitle:@"Cancel"Style:uialertactionstylecancel Handler:nil]]; [Alert addaction:[uialertaction Actionwithtitle:@"Confirm"Style:uialertactionstyledestructive handler:^ (Uialertaction *_nonnull Action) {        //What to do when you click Confirm    }]]; [Self Presentviewcontroller:alert animated:yes completion:nil]; //Note that you must write this sentence, otherwise it will not show

This method can add a text box, enter the content

[Alert addtextfieldwithconfigurationhandler:^ (Uitextfield * _nonnull TextField) {        @ " Please enter a name ";    }];    [Alert Addtextfieldwithconfigurationhandler:^ (Uitextfield * _nonnull TextField) {        @ " Please enter the price " ;    }];

2, the frame appears at the bottom of the screen ( two different ways of the code is the first line of the last, the bottom is Uialertcontrollerstyleactionsheet)

1Uialertcontroller *alert = [Uialertcontroller alertcontrollerwithtitle:@"Tips"Message@"whether to exit"Preferredstyle:uialertcontrollerstyleactionsheet]; 2[Alert addaction:[uialertaction Actionwithtitle:@"Cancel"Style:uialertactionstylecancel Handler:nil]];3[Alert addaction:[uialertaction Actionwithtitle:@"Confirm"Style:uialertactionstyledestructive handler:^ (Uialertaction *_nonnull Action) {4         //What to do when you click Confirm5     }]];6[Self Presentviewcontroller:alert animated:yes completion:nil];//Note that you must write this sentence

Self-learning iOS development small function Three: the two ways of the frame (iOS8.3 after the new way, previously deprecated)