新建一个类继承自UIScrollView 并重写下面的方法
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
[super touchesBegan:touches withEvent:event];
if ( !self.dragging )
{
[[self nextResponder] touchesBegan:touches withEvent:event];
}
}
-(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
[super touchesEnded:touches withEvent:event];
if ( !self.dragging )
{
[[self nextResponder] touchesEnded:touches withEvent:event];
}
}
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