2015-10-22--退出键盘的几种方式,获得手势位置

1. 最常用的textView取消第一响应者：

[textView resignFirstResponder];

2.ios 7以后系统短信方式，退出键盘，可拉可压,只要是scrollView的子类都可以实现

scrollView.keyboardDismissMode=UIScrollViewKeyboardDismissModeInteractive;

3.自定义滑到某个位置退出键盘，一般是在系统键盘上添加了工具栏，导致不能使用keyboardDismissMode方式的时候。

CGPointtouchPoint = [self.sTextView.panGestureRecognizerlocationInView:self.sTextView];

touchPoint = [self.sTextViewconvertPoint:touchPointtoView:self.sTextView.superview];

(touchPoint.x,touchPoint.y)就是手指所在屏幕的滑动时的位置

通过scrollView的代理方法：

- (void)scrollViewWillBeginDragging:(UIScrollView*)scrollView

可以得到手指触摸的初始位置，然后根据滑动时的位置，就可以判断出什么时候可以收回键盘。

4.退出键盘时实现手指滑到哪里，键盘位置到哪里，就是可以随意改变键盘的高度，不让它一下子就消失，只要拿到键盘对象就可以轻松搞定了。在键盘的监听事件里面实现：keyboard是一个

UIView

- (void)keyboardDidShow:(NSNotification*)notification {

if(keyboard)

return;

UIWindow* tempWindow = [[[UIApplicationsharedApplication]windows]objectAtIndex:1];

for(inti =0; i < [tempWindow.subviewscount]; i++) {

UIView*possibleKeyboard = [tempWindow.subviewsobjectAtIndex:i];

if([possibleKeyboardisKindOfClass:NSClassFromString(@"UIPeripheralHostView")]) {

keyboard= possibleKeyboard;

return;

}

}

}

然后可以加个手势轻松搞定

- (void)panGesture:(UIPanGestureRecognizer*)gestureRecognizer {

CGPointlocation = [gestureRecognizerlocationInView:[selfview]];

CGPointvelocity = [gestureRecognizervelocityInView:self.view];

if(gestureRecognizer.state==UIGestureRecognizerStateBegan) {

originalKeyboardY=keyboard.frame.origin.y;

}

if(gestureRecognizer.state==UIGestureRecognizerStateEnded) {

if(velocity.y>0) {

[selfanimateKeyboardOffscreen];

}else{

[selfanimateKeyboardReturnToOriginalPosition];

}

return;

}

CGFloatspaceAboveKeyboard =CGRectGetHeight(self.view.bounds) - (CGRectGetHeight(keyboard.frame) +CGRectGetHeight(textField.frame)) +kFingerGrabHandleHeight;

if(location.y< spaceAboveKeyboard) {

return;

}

CGRectnewFrame =keyboard.frame;

CGFloatnewY =originalKeyboardY+ (location.y- spaceAboveKeyboard);

newY =MAX(newY,originalKeyboardY);

newFrame.origin.y= newY;

[keyboardsetFrame: newFrame];

}

5.获得手势位置，如果控件自身可以滑动，这几个代理方法就不会执行，touch事件也不会执行

- (void)pan:(UIPanGestureRecognizer*)gesture {

NSLog(@"%f", [gesturelocationInView:self].x);

}

- (void)pan:(UIPanGestureRecognizer*)gesture {

NSLog(@"%f", [gesturelocationInView:self.superview].x);

}

- (void)pan:(UIPanGestureRecognizer*)gesture {

NSLog(@"%f", [gesturelocationInView:self.window].x);

}

这个时候你就需要用到这个方法：

CGPointtouchPoint = [self.sTextView.panGestureRecognizerlocationInView:self.sTextView];

touchPoint = [self.sTextViewconvertPoint:touchPointtoView:self.sTextView.superview];