本文介绍了UIPicker检测当前所选行上的点击的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个UIPickerView，并且在点击所选行时未调用方法 didSelectRow .我要处理这个案子有什么想法吗?
I have a UIPickerView and The method didSelectRow is not called when tapping on a selected row. I need to handle this case. Any ideas?
推荐答案
首先，使该类符合UIGestureRecognizerDelegate协议
然后，在视图设置中:
UITapGestureRecognizer *tapToSelect = [[UITapGestureRecognizer alloc]initWithTarget:self
action:@selector(tappedToSelectRow:)];
tapToSelect.delegate = self;
[self.pickerView addGestureRecognizer:tapToSelect];
以及其他地方:
#pragma mark - Actions
- (IBAction)tappedToSelectRow:(UITapGestureRecognizer *)tapRecognizer
{
if (tapRecognizer.state == UIGestureRecognizerStateEnded) {
CGFloat rowHeight = [self.pickerView rowSizeForComponent:0].height;
CGRect selectedRowFrame = CGRectInset(self.pickerView.bounds, 0.0, (CGRectGetHeight(self.pickerView.frame) - rowHeight) / 2.0 );
BOOL userTappedOnSelectedRow = (CGRectContainsPoint(selectedRowFrame, [tapRecognizer locationInView:self.pickerView]));
if (userTappedOnSelectedRow) {
NSInteger selectedRow = [self.pickerView selectedRowInComponent:0];
[self pickerView:self.pickerView didSelectRow:selectedRow inComponent:0];
}
}
}
#pragma mark - UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return true;
}
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