李洪强iOS开发之- 点击屏幕遮挡键盘

李洪强iOS开发之- 点击屏幕遮挡键盘

实现的效果: 

01 - 给当前的view添加点击事件,使点击屏幕的时候,让键盘退出

/**
* 点击屏幕 隐藏键盘
*
* @param tap
*/
-(void)keyboardHide:(UITapGestureRecognizer*)tap
{
[self.view endEditing:YES];
}

UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(keyboardHide:)];
//设置成NO表示当前控件响应后会传播到其他控件上，默认为YES。
tapGestureRecognizer.cancelsTouchesInView = NO;
//将触摸事件添加到当前view
[self.view addGestureRecognizer:tapGestureRecognizer];

#import "CFShoppingCartViewController.h"

02 - 实现点击输入框 的时候,让当前的view整体上移,目的是不遮盖当前的输入框

03 - 实现textview的代理

#pragma mark --- 实现UITextView的代理---

-(void)textViewDidChange:(UITextView *)textView

{

_textView11.text = textView.text;

if (textView.text.length == 0) {

_label11.text = @"有什么需要补充的";

}else{

_label11.text = @"";

}

}

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView{

_label11.text = @"";

//  [self.label1 removeFromSuperview];

return YES;

}

- (BOOL)textViewShouldEndEditing:(UITextView *)textView{

_label11.text = @"";

return YES;

}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

[UIView animateWithDuration:0.8 animations:^{

[self.view endEditing:YES];

}];

}

 03 - 键盘的通知

#pragma mark — 键盘遮挡

-(void)createNotifiticationCenter

{

//创建通知中心

NSNotificationCenter * center = [NSNotificationCenter defaultCenter];

//键盘弹出

[center addObserver:self selector:@selector(receivesKeyBordShowNotification:) name:UIKeyboardWillShowNotification object:nil];

//监听键盘收回时发送的通知

[center addObserver:self selector:@selector(receivesKeyBordHiddenNotification:) name:UIKeyboardWillHideNotification object:nil];

}

-(void)receivesKeyBordShowNotification:(NSNotification *)noti

{

//取出键盘的弹起时间

NSTimeInterval time = [[noti.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue];

//在键盘的这段时间内将界面上的控件上移

//使用动画

[UIView animateWithDuration:time delay:0 options:0 animations:^{

//将界面整体上移

CGRect boubds = self.view.bounds;

boubds.origin.y = 170;

self.view.bounds = boubds;

} completion:^(BOOL finished) {

}];

}

-(void)receivesKeyBordHiddenNotification:(NSNotification *)notifi

{

//从通知信息体取出键盘收回的时间

NSTimeInterval time = [[notifi.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue];

//用动画将界面下移

[UIView animateWithDuration:time delay:0 options:0 animations:^{

CGRect bounds = self.view.bounds;

bounds.origin.y = 0;

self.view.bounds = bounds;

} completion:^(BOOL finished) {

}];

}