- (void)j_tapDismissKeyboard
{
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
UITapGestureRecognizer *singleTapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(j_tapAnywhereToDismissKeyboard:)];
__weak UIViewController *weakSelf = self;
NSOperationQueue *mainQuene =[NSOperationQueue mainQueue];
[nc addObserverForName:UIKeyboardWillShowNotification object:nil queue:mainQuene usingBlock:^(NSNotification *note) {
[weakSelf.view addGestureRecognizer:singleTapGR];
}];
[nc addObserverForName:UIKeyboardWillHideNotification object:nil queue:mainQuene usingBlock:^(NSNotification *note) {
[weakSelf.view removeGestureRecognizer:singleTapGR];
}];
}
- (void)j_tapAnywhereToDismissKeyboard:(UIGestureRecognizer *)gestureRecognizer
{
[self.view endEditing:YES];
}
1、关闭所有actionSheet和alertView:
- (void)closeModalView {
for(UIWindow* window in [UIApplication sharedApplication].Windows) {
for(UIView* view in window.subviews) {
[self dismissActionSheetAndAletrtViewInView:view];
}
}
}
- (void)dismissActionSheetAndAletrtViewInView:(UIView*)view {
if ([view isKindOfClass:[UIActionSheet class]]) {
UIActionSheet *actionView = (UIActionSheet *)view;
[actionView dismissWithClickedButtonIndex:actionView.cancelButtonIndex animated:NO];
}
else if ([view isKindOfClass:[UIAlertView class]]) {
UIAlertView *alertView = (UIAlertView *)view;
[alertView dismissWithClickedButtonIndex:alertView.cancelButtonIndex animated:NO];
}
else {
for (UIView* subView in view.subviews) {
[self dismissActionSheetAndAletrtViewInView:subView];
}
}
}
2、隐藏所有键盘：
- (void)hideKeyBoard {
for (UIWindow* window in [UIApplication sharedApplication].windows) {
for (UIView* view in window.subviews) {
[self dismissAllKeyBoardInView:view];
}
}
}
-(BOOL) dismissAllKeyBoardInView:(UIView *)view {
if([view isFirstResponder]) {
[view resignFirstResponder];
return YES;
}
for(UIView *subView in view.subviews) {
if([self dismissAllKeyBoardInView:subView]) {
return YES;
}
}
return NO;
}
在baseViewController 里边 隐藏键盘的操作
原文：http://www.cnblogs.com/yecong/p/6423263.html