reason: -[UIKBBlurredKeyView candidateList]: unrecognized selector sent to instance

最新推荐文章于 2017-10-17 18:19:20 发布

原创最新推荐文章于 2017-10-17 18:19:20 发布 · 3.5k 阅读

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#手写输入Crash #UIKBBlurre

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本文探讨了iOS应用中因重写UIScrollView触摸方法而导致的键盘崩溃问题。通过添加额外的UIView和手势识别器来实现键盘隐藏功能，解决了手写输入时的崩溃现象。

reason: -[UIKBBlurredKeyView candidateList]: unrecognized selector sent to instance

发现上线的app一直会有这个crash信息，直到最近才去重视这个问题，发现是在手写输入的时候会crash，原因是因为我在UIScrollview的category中重写了三个方法如下：

 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [[self nextResponder] touchesBegan:touches withEvent:event];
    [super touchesBegan:touches withEvent:event];
}

 -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    [[self nextResponder] touchesMoved:touches withEvent:event];
    [super touchesMoved:touches withEvent:event];
}

 -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    [[self nextResponder] touchesEnded:touches withEvent:event];
    [super touchesEnded:touches withEvent:event];
}

按照自己的和网上的方法进行整理一下：

1.在UIScrollView上面加一个UIView,通过在view上面的手势来改变键盘

UITapGestureRecognizer *tapGr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard:)];
tapGr.cancelsTouchesInView = NO;
[backView addGestureRecognizer:tapGr];

2.在UITableView上改变键盘

UITapGestureRecognizer *tapGr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard:)];
//记得加这句，不然会屏蔽到TableView的点击事件等
tapGr.cancelsTouchesInView = NO;
[tableView addGestureRecognizer:tapGr];