应用场景:登录界面或者填写信息的时候点击空白退出键盘
- 一般解决方案:
1.监听scrollView实时滚动代理方法调用[self.view endEditing:YES]或者[self.textField resignFirstResponse];
2.touchBegin方法里,调用[self.view endEditing:YES]或者[self.textField resignFirstResponse];
这里介绍另外一种解决方案
- 1.给viewController写一个分类
- 2.利用键盘弹出和退出发出通知调用相应的方法
- 3.给当前控制器添加点击手势
@interface UIViewController (DismissKeyboard)
-(void)setupForDismissKeyboard;
@end
@implementation UIViewController (DismissKeyboard)
- (void)setupForDismissKeyboard {
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
UITapGestureRecognizer *singleTapGR =
[[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(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)tapAnywhereToDismissKeyboard:(UIGestureRecognizer *)gestureRecognizer {
//此method会将self.view里所有的subview的first responder都resign掉
[self.view endEditing:YES];
}
用法
#import "UIViewController+DismissKeyboard.h"
- (void)viewDidLoad {
[super viewDidLoad];
[self setupForDismissKeyboard];
}
