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LVMAlertController *alertController = [LVMAlertController alertControllerWithTitle:@"TITLE" message:@"some message" preferredStyle:LVMAlertControllerStyleAlert];

LVMAlertAction *action = [LVMAlertAction actionWithTitle:@"OK" style:LVMAlertActionStyleDefault handler:nil];
[alertController addAction:action];

action = [LVMAlertAction actionWithTitle:@"Cancel" style:LVMAlertActionStyleCancel handler:^(LVMAlertAction * _Nonnull action) {
    NSLog(@"%@", action.title);
}];
[alertController addAction:action];

[alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
    textField.placeholder = @"A text field placeholder";
}];

[self presentViewController:alertController animated:YES completion:nil];

LVMAlertController.alert
    .setupTitle(@"Title")
    .setupMessage(@"message")
    .addActionsWithTitles(@"ok", @"later", @"know", nil)
    .addCancelActionWithTitle(@"cancel")
    .actionsHandler(^(NSInteger index, LVMAlertAction *action) {
        NSLog(@"click %ld, %@", index, action.title);
    })
    .show(^{
        NSLog(@"show");
    });