收回键盘几种方式

1. 点击键盘的return键收回键盘

//需要实现UITextFieldDelegate协议中的方法  
-(BOOL)textFieldShouldReturn:(UITextField *)textField  
{  
    [textField resignFirstResponder];  
    return YES;  
}  

• 点击屏幕空白处收回键盘

 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self.view endEditing:YES];
}

手势现实

- (void)viewDidLoad
{    
   self.view.userInteractionEnabled = YES;   
   UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(fingerTapped:)];    
   [self.view addGestureRecognizer:singleTap];
   
}
- (void)fingerTapped:(UITapGestureRecognizer *)gestureRecognizer
{   
   [self.view endEditing:YES];  
}

• 拖拽收回键盘

 - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    [self.view endEditing:YES];
}