RootViewController.h#import <UIKit/UIKit.h>@interface RootViewController : UIViewController<UIActionSheetDelegate>@endRootViewController.m-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{  UIActionSheet *actionSheet=[[UIActionSheet alloc]initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"手機找回密碼", nil];  [actionSheet showInView:self.view];}#pragma mark - UIActionSheetDelegate- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{  switch (buttonIndex) {    case 0:    {      NSLog(@"--0--");    }      break;    case 1:    {       NSLog(@"--1--");    }      break;    default:      break;  }}- (void)willPresentActionSheet:(UIActionSheet *)actionSheet{  for (UIView *subViwe in actionSheet.subviews) {    if ([subViwe isKindOfClass:[UIButton class]]) {      UIButton *button = (UIButton*)subViwe;      button.titleLabel.font=[UIFont systemFontOfSize:15];      [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];    }  }}