这是用来弹出多重选项的,并且每个选项还可以自定义事件,这与uialert还不一样。
先看看它长啥样。
再说实现过程
在controller的.m中,先实现代理
@interface controllerA<UIActionSheetDelegate>
然后添加事件,比如点击按钮的事件
-(void)clickBtn{ UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"添加联系人" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"从通讯录添加",@"手动添加",@"从会议通讯录添加", nil]; [sheet showInView:self.view];//在当前view显示action sheet }
//每个选项的事件 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { if (0 == buttonIndex) {// 从通讯录添加 ControllerB *b = [[ControllerB alloc] init]; b.delegate = self; [self presentViewController:b animated:YES completion:nil]; }else if (1 == buttonIndex){// 手动添加 ControllerC *c = [[ControllerC alloc] init]; c.delegate = self; [self presentViewController:c animated:YES completion:nil]; }else if (2 == buttonIndex){ ControllerC *b = [[ControllerC alloc] init]; c.delegate = self; [self presentViewController:c animated:YES completion:nil]; } }
cancelButtonTitle destructiveButtonTitle是系统自动的两项。
sheet也可以加到keyWindow中,防止遮挡
[sheet showInView:[UIApplication sharedApplication].keyWindow];