self.refreshControl = [[UIRefreshControl alloc]init];
[self.objDiscussiontopic addSubview:self.refreshControl];
[self.refreshControl addTarget:self action:@selector(refreshTable) forControlEvents:UIControlEventValueChanged];
- (void)refreshTable {
//TODO: refresh your data
[self.refreshControl endRefreshing];
}
这是我用来在我的 ScrollView 中添加刷新 Controller 的代码。 但是当我下拉 ScrollView 时，刷新控件没有显示，目标方法也没有被调用，为什么？
我搜索了一段时间，但没有得到任何合适的答案。
还有一件事 scrollview 有像这样的 VFL 约束:
//Pin scrolview to Parent View
[VFLConstraint allignSubViewViewHorizentallyWithSubView:self.objDiscussiontopic OverSuperView:[self view]];
[VFLConstraint allignSubViewViewVerticallyWithSubView:self.objDiscussiontopic OverSuperView:[self view] WithTopPading:[CommonFunction convertIphone6ToIphone5:0] AndBotomPading:[CommonFunction convertIphone6ToIphone5:57]];
+ (void)allignSubViewViewHorizentallyWithSubView:(UIView *)subView OverSuperView:(UIView *)superView{
NSDictionary *viewDict= NSDictionaryOfVariableBindings(subView);
[superView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[subView]|" options:0 metrics: 0 views:viewDict]];
}
+ (void)allignSubViewViewVerticallyWithSubView:(UIView *)subView OverSuperView:(UIView *)superView WithTopPading:(float)topPading AndBotomPading:(float)bottomPading{
NSDictionary *viewDict= NSDictionaryOfVariableBindings(subView);
NSDictionary *metrics=[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithFloat:topPading],@"topPading",[NSNumber numberWithFloat:bottomPading],@"bottomPading", nil];
[superView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-topPading-[subView]-bottomPading-|" options:0 metrics: metrics views:viewDict]];
}
最佳答案
尝试:
[self.scrollView insertSubview:self.refreshControl atIndex:0];
检查 contentSize 它可以小于帧大小，如果是这样使用这行代码:
self.scrollView.alwaysBounceVertical = true
关于ios - UIScrollview 拉动刷新不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33493470/