iOS中UIActionSheet动态添加按钮

#import <UIKit/UIKit.h>@interface RootViewController : UIViewController<UIActionSheetDelegate>@end 

//点击任何处，弹出UIActionSheet-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{  UIActionSheet *sheet=[[UIActionSheet alloc]initWithTitle:@"标题" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil, nil];  // 逐个添加按钮（比如可以是数组循环）  [sheet addButtonWithTitle:@"Item A"];  [sheet addButtonWithTitle:@"Item B"];  [sheet addButtonWithTitle:@"Item C"];  // 同时添加一个取消按钮  [sheet addButtonWithTitle:@"Cancel"];  sheet.cancelButtonIndex = sheet.numberOfButtons-1;  [sheet showInView:self.view];}