更新 UIScrollView 的子视图而不更新滚动句柄

Question

好的，所以我有一个子类 UIScrollView，里面有一些子视图，当设备方向发生变化时，我想更新内部子视图的位置，以便它们适应新的方向。

当我刚刚更新了子视图的位置然后开始滚动时，我注意到滚动句柄是巨大的......我遍历所有子视图并更新它们的框架的循环也设置了滚动句柄的框架。 ..

所以为了解决这个问题.. 每当我添加子视图时，我都会在它们上设置一个标签。当方向改变时，我的设置框架周围有一个条件，它检查视图上的标签是否与我添加的子视图匹配。如果是，则设置框架...

int i = 0;

for (UIView *gridViewItem in self.subviews) {

    if (gridViewItem.tag == GRID_CELL) {
        gridViewItem.frame = [self calculateCellPosition:i];
    }

    i++;

}

但是现在我想检测子视图上的触摸，我能想到的最简单的方法是使用标签属性，这样我就知道正在点击哪个子视图......但是标签目前被用来帮我将滚动句柄与其他子视图区分开来...

当我退出 UIScrollView 的子视图时，我得到了这个：

2011-05-08 16:07:56.266 XXXXXX[2096:207] (
"<UIView: 0x5a0d3f0; frame = (16 16; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a09250>>",
"<UIView: 0x5a19d70; frame = (167 16; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a17660>>",
"<UIView: 0x5a1d4f0; frame = (16 137; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a1d520>>",
"<UIView: 0x5a1e300; frame = (167 137; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a1e330>>",
"<UIView: 0x5a1e4f0; frame = (16 258; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a1e520>>",
"<UIView: 0x5a1f320; frame = (167 258; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a1f350>>",
"<UIView: 0x5a20120; frame = (16 379; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a20150>>",
"<UIView: 0x5a20fb0; frame = (167 379; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a20fe0>>",
"<UIView: 0x5a21dd0; frame = (16 500; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a21e00>>",
"<UIView: 0x5a22bb0; frame = (167 500; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a22be0>>",
"<UIView: 0x5a239a0; frame = (16 621; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a239d0>>",
"<UIView: 0x5a247b0; frame = (167 621; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a247e0>>",
"<UIView: 0x5a20f30; frame = (16 742; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a20f80>>",
"<UIView: 0x5a26460; frame = (167 742; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a26490>>",
"<UIView: 0x5a27220; frame = (16 863; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a27250>>",
"<UIView: 0x5a20dd0; frame = (167 863; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a28080>>",
"<UIView: 0x5a28e60; frame = (16 984; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a28e90>>",
"<UIView: 0x5a29c50; frame = (167 984; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a29c80>>",
"<UIView: 0x5a2aa60; frame = (16 1105; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a2aa90>>",
"<UIView: 0x5a2b870; frame = (167 1105; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a2b8a0>>",
"<UIView: 0x5a255a0; frame = (16 1226; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a255f0>>",
"<UIView: 0x5a262f0; frame = (167 1226; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a2d610>>",
"<UIView: 0x5a2e3c0; frame = (16 1347; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a2e3f0>>",
"<UIView: 0x5a2f1d0; frame = (167 1347; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a2f200>>",
"<UIView: 0x5a2ffc0; frame = (16 1468; 135 105); clipsToBounds = YES; tag = 1; layer = <CALayer: 0x5a2fff0>>"

)

所有的子视图上都有我的标签！我看不到滚动手柄？有谁知道不使用像我这样的标签来识别滚动句柄的方法？

您的帮助将不胜感激！谢谢！

Answer 1

我可能不会为此子类 UIScrollView。将单个 UIView 添加到 UIScrollView 并将您的单元格添加到该视图。然后始终使用该视图。不需要标签，也不会干扰 UIScrollViews 的内部工作。只要内容视图的大小反映其中的单元格，滚动就应该起作用。