我搜索了高低,似乎找不到答案。我见过的最接近的是: UITextView cursor below frame when changed frame
抱歉,没有截图,因为我(几乎)没有声誉,但它看起来类似于链接的 SO 帖子。
当我在 iOS6 上运行应用程序时,一切正常(内容随光标滚动以保持在屏幕上),但在 iOS7 上,光标超出 UITextView 的末尾一行。我尝试添加 UIEdgeInsets 来移动内容,但是当用户主动输入文本时,它只会不断添加新行,直到光标位于文本视图的末尾下方。
我的布局由一个标签(headerText)和一个 UITextView(textView)组成。此视图从标签栏显示。添加了一个键盘输入附件,但在调用该函数之前,它的高度会自动计算为键盘高度。
这是我用来调整视图大小的函数,从键盘显示/隐藏委托、旋转、初始布局等调用:
-(void)resizeViewsWithKbdHeight:(float)kbHeight
{
//set the header label frame
//set constraints
//total view width - 30 (15 each for left and right padding)
CGFloat labelWidth = ([[[self navigationController] view] bounds].size.width - 30);
CGSize constraintSize = {labelWidth, CGFLOAT_MAX};
//calculate needed height for header label
CGSize textSize = [[self headerText] sizeWithFont:[UIFont systemFontOfSize:17.0f]
constrainedToSize:constraintSize
lineBreakMode:NSLineBreakByWordWrapping];
//build and set frame for header label:
//make it the same as the old
CGRect headerTempSize = [[self headerLabel] frame];
//except for the height
headerTempSize.size.height = textSize.height;
//and set it
[[self headerLabel] setFrame:headerTempSize];
//correct the placement of the UITextView, so it's under the header label
//build a new frame based on current textview frame
CGRect newFrame = [[self textView] frame];
//get the y position of the uitextview, the +8 is the padding between header and uitextview
CGFloat vertPadding = [[self headerLabel] frame].origin.y + [[self headerLabel] frame].size.height + 8;
//bump it down vertically
newFrame.origin.y = vertPadding;
//bump things down by the amount of the navigation bar and status bar
float offscreenBump = [[[self navigationController] navigationBar] frame].origin.y + [[[self navigationController] navigationBar] frame].size.height;
//if we aren't showing the keyboard, add the height of the tab bar
if(kbHeight == 0) {
offscreenBump += [[[self tabBarController] tabBar] frame].size.height;
}
//calculate the new height of the textview, the +9 is for padding below the text view
CGFloat newHeight = [[[self navigationController] view] bounds].size.height - ([[self textView] frame].origin.y + 9 + kbHeight + offscreenBump);
//resize the height as calculated
newFrame.size.height = newHeight;
//set textview frame to this new frame
[[self textView] setFrame:newFrame];
}
我正在尝试支持 iOS5,所以没有 AutoLayout。
有可能我对自己做事的方式非常天真。
提前致谢!