iOS开发第三方键盘处理实例代码
最近项目中遇到了键盘处理通知被调用多次的情况,废了好半天时间才找到解决办法,今天就给小伙伴儿们唠唠第三方键盘处理的那些坑!
详情请看:『https://github.com/boai/BAKeyboardDemo』 !
1、聊天评论框的封装
先聊聊我项目中遇到的奇葩情况吧,一个直播界面,上面播放器,下面是分段控制器5个button,5个界面,其中三个界面最下面都是评论框,所以就封装了一个评论框公用。
但是本来用的『IQKeyboardManager』,开源键盘处理框架,可是在同一个界面有多个评论框就出现问题了。
2、先看看『IQKeyboardManager』的使用吧:
#import "AppDelegate.h" AppDelegate 中添加这段代码,就可以全局不用管键盘的弹起收回了! #pragma mark - 键盘处理 - (void)completionHandleIQKeyboard { IQKeyboardManager *manager = [IQKeyboardManager sharedManager]; manager.enable = YES; manager.shouldResignOnTouchOutside = YES; manager.shouldToolbarUsesTextFieldTintColor = YES; manager.enableAutoToolbar = YES; }
3、具体解决办法
但是我项目中得复杂情况就不行了,键盘弹起异常,收回也异常,尤其是用了聊天室这种view,处理的更麻烦,不要急,看看博爱这些年踩过的坑吧:
先看看键盘处理事件吧:
- 1、首先注册通知: - (void)registNotification { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardWillShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasHidden:) name:UIKeyboardWillHideNotification object:nil]; } - 2、再把后路想好:移除通知 - (void)removeNotification { [[NSNotificationCenter defaultCenter] removeObserver:self]; } - 3、通知事件处理: /*! 键盘显示要做什么 */ - (void)keyboardWasShown:(NSNotification *)notification { NSDictionary *info = [notification userInfo]; double duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; CGFloat curkeyBoardHeight = [[info objectForKey:@"UIKeyboardBoundsUserInfoKey"] CGRectValue].size.height; CGRect begin = [[info objectForKey:@"UIKeyboardFrameBeginUserInfoKey"] CGRectValue]; CGRect end = [[info objectForKey:@"UIKeyboardFrameEndUserInfoKey"] CGRectValue]; CGFloat keyBoardHeight; /*! 第三方键盘回调三次问题,监听仅执行最后一次 */ if(begin.size.height > 0 && (begin.origin.y - end.origin.y > 0)) { keyBoardHeight = curkeyBoardHeight; [UIView animateWithDuration:duration animations:^{ CGRect viewFrame = [self getCurrentViewController].view.frame; viewFrame.origin.y -= keyBoardHeight; [self getCurrentViewController].view.frame = viewFrame; }]; } } - (void)keyboardWasHidden:(NSNotification *)notification { NSDictionary *info = [notification userInfo]; double duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; [UIView animateWithDuration:duration animations:^{ CGRect viewFrame = [self getCurrentViewController].view.frame; viewFrame.origin.y = 0; [self getCurrentViewController].view.frame = viewFrame; }]; } /*! * 获取当前View的VC * * @return 获取当前View的VC */ - (UIViewController *)getCurrentViewController { for (UIView *view = self; view; view = view.superview) { UIResponder *nextResponder = [view nextResponder]; if ([nextResponder isKindOfClass:[UIViewController class]]) { return (UIViewController *)nextResponder; } } return nil; }
具体情况是这样的,在测试过程中,其他界面的评论框都没问题,就直播这个VC有问题,就一步步往下找,后来发现:iOS的第三方键盘会在【- (void)keyboardWasShown:(NSNotification *)notification】这个方法中来回调用多次,不止三次好像,然后就想到一个办法,
/*! 第三方键盘回调三次问题,监听仅执行最后一次 */ if(begin.size.height > 0 && (begin.origin.y - end.origin.y > 0)) { keyBoardHeight = curkeyBoardHeight; [UIView animateWithDuration:duration animations:^{ CGRect viewFrame = [self getCurrentViewController].view.frame; viewFrame.origin.y -= keyBoardHeight; [self getCurrentViewController].view.frame = viewFrame; }]; }
在这里处理这个键盘弹起事件中第一次获取键盘的高度,然后就直接把上面的view给弹上去,这样就避免了第三方键盘会来回调用多次方法,造成键盘弹起异常的问题就迎刃而解了!
4、如果这样还不能解决你的键盘问题,还有中万能方法:
平时可能遇到这种需求:点击一个按钮,弹出评论框和键盘,这时你就需要这样处理了:
1、创建一个 TextField、TextField2,把TextField位置放到屏幕外面看不到的地方,TextField 有个属性,用法如下:
self.replyTextField.inputAccessoryView = self.replyTextField2;
需要添加target 事件:
[self.replyTextField addTarget:self action:@selector(replyTextFieldChanged:) forControlEvents:UIControlEventEditingChanged];
事件方法处理:
- (void)replyTextFieldChanged:(UITextField *)textField { NSLog(@"textFieldShouldBeginEditing输入内容****:%@", textField.text); if (textField != self.replyTextField2) { self.replyTextField2.text = textField.text; } NSLog(@"textFieldShouldBeginEditing输入内容1:%@", self.replyTextField.text); NSLog(@"textFieldShouldBeginEditing输入内容2:%@", self.replyTextField2.text); } - (BOOL)textFieldShouldReturn:(UITextField *)textField { [self.replyTextField resignFirstResponder]; [self.replyTextField2 resignFirstResponder]; [[self getCurrentViewController].view endEditing:YES]; if (self.clickIndexBlock) { self.clickIndexBlock(self.replyTextField2.text); self.replyTextField.text = @""; self.replyTextField2.text = @""; } return YES; }
这样处理,不管你的键盘在哪里,输入框都会跟着你的键盘走,而且不会再出现错位,计算不准确的地方!
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