Uialertcontroller class--sheet Pull-up menu 1 (Basic)

First, the effect

Second, the Code implementation

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

{

[Self sheetTest1];

}

/**

Note: You cannot add a text box to the pull-down menu

If a text box is forcibly added, a run-time error is reported:

Reason: ' Text fields can-only is added to an alert controller of style Uialertcontrollerstylealert '

*/

/**

* Bottom pull-up menu

*/

-(void) SheetTest1

{

/**

The pull-up menu can be useful when you need to show users a range of choices, and the pull-up menu is displayed in the form of a device size.

1. On iphone (tighten width), pull-up menu rises from bottom of screen

2. On ipad (regular width), the pull-up menu is displayed as a popup box

The way you create a pull-down menu is very similar to the way you create a dialog box, except that the only difference is their form

*/

/**

Note: the "Cancel" button is always at the bottom of the pull-down menu

The IOS user interface Guide requires that all "destroy" style buttons must be ranked first and red.

*/

1. Create a View Controller

Uialertcontroller *alertcontroller = [Uialertcontroller

alertcontrollerwithtitle:@ "Save or delete data"

message:@ "Delete data will not be recoverable"

Preferredstyle:uialertcontrollerstyleactionsheet];

2. Add a button

Uialertaction *cancelaction = [uialertaction

actionwithtitle:@ "Cancel"

Style:uialertactionstylecancel

Handler:nil];

Uialertaction *deleteaction = [uialertaction

actionwithtitle:@ "Delete"

Style:uialertactionstyledestructive

Handler:nil];

Uialertaction *archiveaction = [uialertaction

actionwithtitle:@ "Save"

Style:uialertactionstyledefault

Handler:nil];

3. Add a button to the view controller

[Alertcontroller addaction:cancelaction];

[Alertcontroller addaction:deleteaction];

[Alertcontroller addaction:archiveaction];

4. Display View Controller

[Self Presentviewcontroller:alertcontroller animated:yes completion:nil];

}

Uialertcontroller class--sheet Pull-up menu 1 (Basic)