Third, the iOS8 after the window indicator

when users use the app for some risky operations, the use of dialog boxes to prompt users to play a very user-friendly role. The following two types of dialogs are commonly used: Uiactionsheet and Uialertview. But after iOS8 uiactionsheet and uialertview are defined as obsolete, official documentation explains:

Uiactionsheet is deprecated. Use Uialertcontroller with a preferredstyle of Uialertcontrollerstyleactionsheet instead

Here are the basic uses of two common dialog boxes:

//First way

Create a bullet box indicator

Uiactionsheet *sheet = [[Uiactionsheet alloc] initwithtitle:@ "Are you sure you want to cancel?" "Delegate:self cancelbuttontitle:@" Cancel "destructivebuttontitle:@" OK "otherbuttontitles:nil, nil];

Bullet Box Tips

[Sheet Showinview:nil];

Use Uiactionsheet's proxy method for related operations

Proxy methods for #pragma mark-actionsheet

-(void) Actionsheet: (Uiactionsheet *) Actionsheet Clickedbuttonatindex: (Nsinteger) Buttonindex;

{

if (Buttonindex = = 0) {//click OK button

//write code that requires relevant action

}

The second way

Create dialog box

Uialertcontroller *alert = [Uialertcontroller alertcontrollerwithtitle:nil message:@ "Pro, are you sure you want to log off? [Preferredstyle:uialertcontrollerstyleactionsheet];

Create Cancel button

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

Related actions

}];

Create OK button

Uialertaction *sureaction = [uialertaction actionwithtitle:@ "OK" style:uialertactionstyledestructive handler:^ ( Uialertaction *action) {

callback method

[Self.navigationcontroller Popviewcontrolleranimated:yes];

}];

Add a button to a dialog box

[Alert addaction:cancelaction];

[Alert addaction:sureaction];

Show dialog box

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

Related actions after completion of display

}];

Third, the iOS8 after the window indicator