UIModalPresentationFormSheet模式下resignFirstResponder无法隐藏键盘

弹出UIModalPresentationFormSheet模式

- (IBAction)buttonPressed:(id)sender
{
    NSLog(@"Show feedback view now!");
    UIViewController *fbsheet = [[FeedbackSheet alloc] initWithNibName:@"FeedbackSheet" bundle:nil];
    fbsheet.modalPresentationStyle = UIModalPresentationFormSheet;
    [self presentModalViewController:fbsheet animated:YES];
    
    [fbsheet release];
}

效果如下：



但是当在UItextview软盘弹出之后，点击其他区域使用下面代码软盘无法隐藏

 [feedbackContent resignFirstResponder];

进查询资料之后发现重写disablesAutomaticKeyboardDismissal即可，该api在iOS (4.3 and later)

-(BOOL)disablesAutomaticKeyboardDismissal
{
    return NO;
}

还有一种方式就是通过在键盘上添加toolbar，也是一种比较简易的操作

   - (void)viewDidLoad
{
    [super viewDidLoad];
    
    UIToolbar * topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
    [topView setBarStyle:UIBarStyleBlack];

    UIBarButtonItem * btnSpace = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
    UIBarButtonItem * doneButton = [[UIBarButtonItem alloc] initWithTitle:@"收起键盘" style:UIBarButtonItemStyleDone target:self action:@selector(dismissKeyBoard)];
    [doneButton setWidth:80];
    
    NSArray * buttonsArray = [NSArray arrayWithObjects:btnSpace,doneButton,nil];
    [doneButton release];
    [btnSpace release];
    
    [topView setItems:buttonsArray];
    [feedbackContent setInputAccessoryView:topView];
}

-(IBAction)dismissKeyBoard
{
    [feedbackContent resignFirstResponder];
}

效果如下：




参考资料： http://stackoverflow.com/questions/3019709/modal-dialog-does-not-dismiss-keyboard