Question

我一直在寻找我的问题的答案。你看我有一个UIActionSheet，当用户试图按下一个他们不应该按下的按钮时，我正在关闭它：它工作得很好，但我试图触发UIAlert让用户知道当前的操作已经停止，他们需要按“继续”...我的问题在我的 - （void）actionSheet ....该方法未被actionSheet调用或buttonIndex未正确设置。

·H

#import <UIKit/UIKit.h>

@interface DVRRemote : UIViewController <UIActionSheetDelegate>
@property (nonatomic) BOOL pwrOff;
@property (nonatomic) BOOL dvrState;
@property (nonatomic) BOOL playState;
@property (nonatomic) BOOL rcdState;
@property (nonatomic) BOOL rcdPlay;
@property (strong, nonatomic) IBOutlet UISwitch *pwrSwitch;
@property (strong, nonatomic) IBOutlet UITextField *dvrStateLbl;
@property (strong, nonatomic) IBOutlet UITextField *PwrLbl;
- (IBAction)buttonPressed:(UIButton *)sender;
- (IBAction)pwrPressed:(UISwitch *)sender;
@end

以下是代码UIActionSheet和UIAlertView ...请帮忙。这项工作已经过了两周了。

的.m

-(IBAction)buttonPressed:(UIButton*)sender
{
    if (_pwrOff == NO)
    {
        if (_rcdPlay == NO)
        {
            if ([sender.currentTitle isEqual: @"Play"])
            {
                _dvrStateLbl.text = @"Playing";
                _playState = YES;
                _rcdState = NO;
            }
        }
        else
        {
            UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Play not Allowed during Record" delegate:nil cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Continue" otherButtonTitles:nil];
            [actionSheet showInView: self.view];
        }
    }
}

-(void)actionSheet:(UIActionSheet*)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if (buttonIndex != [actionSheet cancelButtonIndex])
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Playing" message:[NSString stringWithFormat:@"Recording stopped"] delegate:self cancelButtonTitle:@"ok"  otherButtonTitles:nil];
        [alert show];
    }
}

请注意：我已在每个buttonIndex == 0, == 1, == 2下编码警报......它不想显示。

非常感谢能够提供帮助的人！问候，

Answer 1

您需要通过以下方式将代理设置为视图控制器（您希望接收操作表委托方法的对象）：

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Play not Allowed during Record" 
    delegate:self 
    cancelButtonTitle:@"Cancel" 
    destructiveButtonTitle:@"Continue" 
    otherButtonTitles:nil];

Answer 2

你的actionSheet委托是nil，你没有设置你的委托。

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Play not Allowed during Record" delegate:self cancelButtonTitle:@"Cancel"  destructiveButtonTitle:@"Continue" otherButtonTitles:nil];
[actionSheet showInView: self.view];

显示UIActionSheet后，UIAlertView不会触发

·H

的.m

2 个答案: