代码改变世界

convertRect, convertPoint

2018-11-21 10:09  法子  阅读(436)  评论(0)  编辑  收藏  举报

参考文章：http://www.cnblogs.com/chenyg32/p/4800420.html

想获取在其他控件里的button相对与整个self.view的frame

    CGRect rect = [self.view convertRect:_button.frame fromView:_button.superview];
    CGRect rect = [_button.superview convertRect:_button.frame toView:self.view];
      let rect = self.view.convert(button.frame, from: button.superview)
      let rect = button.superview?.convert(button.frame, to: self.view)

想获取（相对于屏幕的坐标的）触摸点相对于某个tableView的坐标

   //view参数为nil则表示整个屏幕
    CGPoint tablePT = [_tableView convertPoint:screenPoint fromView:nil];
    CGPoint tablePT = [[UIApplication sharedApplication].delegate.window convertPoint:screenPoint toView:_tableView];
    let point = tableView.convert(screenPoint, from: nil)
    let point = UIApplication.shared.delegate?.window?.convert(screenPoint, to: tableView)