问题描述
我正在使用 UIMenuItem
和 UIMenuController
将 highlight 功能添加到我的 UITextView
,因此用户可以改变所选文本的背景颜色,如下图所示:
I'm using UIMenuItem
and UIMenuController
to add a highlight feature to my UITextView
, so the user can change the background color of the selected text, as shown in the pictures bellow:
- 在
UITextView
中设置文本,用户可以使用 highlight 功能:
- Setected text in
UITextView
with the highlight feature available to the user:
UITextView">
- 在
UITextView
中突出显示的文本具有新的背景颜色,由用户在点击 突出显示 功能后选择:
- Highlighted text in
UITextView
with a new background color, chosen by the user after tapping on the highlight feature:
在 iOS 7 中,以下代码工作可以完美地完成此任务:
In iOS 7 the following code is working perfectly to accomplish this task:
- (void)viewDidLoad {
[super viewDidLoad];
UIMenuItem *highlightMenuItem = [[UIMenuItem alloc] initWithTitle:@"Highlight" action:@selector(highlight)];
[[UIMenuController sharedMenuController] setMenuItems:[NSArray arrayWithObject:highlightMenuItem]];
}
- (void)highlight {
NSRange selectedTextRange = self.textView.selectedRange;
[attributedString addAttribute:NSBackgroundColorAttributeName
value:[UIColor redColor]
range:selectedTextRange];
// iOS 7 fix, NOT working in iOS 8
self.textView.scrollEnabled = NO;
self.textView.attributedText = attributedString;
self.textView.scrollEnabled = YES;
}
但在 iOS 8 中,文本选择正在跳跃.当我使用 UIMenuItem
和 UIMenuController
中的 highlight 功能时,它也会跳转到另一个 UITextView
偏移量.
But in iOS 8 the text selection is jumping. When I use the highlight feature from the UIMenuItem
and UIMenuController
it jumps also to another UITextView
offset.
如何在 iOS 8 中解决这个问题?
How do I solve this problem in iOS 8?
推荐答案
我最终是这样解决了我的问题,如果其他人有更优雅的解决方案,请告诉我:
I ended up solving my problem like this, and if someone else has a more elegant solution please let me know:
- (void)viewDidLoad {
[super viewDidLoad];
UIMenuItem *highlightMenuItem = [[UIMenuItem alloc] initWithTitle:@"Highlight" action:@selector(highlight)];
[[UIMenuController sharedMenuController] setMenuItems:[NSArray arrayWithObject:highlightMenuItem]];
float sysVer = [[[UIDevice currentDevice] systemVersion] floatValue];
if (sysVer >= 8.0) {
self.textView.layoutManager.allowsNonContiguousLayout = NO;
}
}
- (void)highlight {
NSRange selectedTextRange = self.textView.selectedRange;
[attributedString addAttribute:NSBackgroundColorAttributeName
value:[UIColor redColor]
range:selectedTextRange];
float sysVer = [[[UIDevice currentDevice] systemVersion] floatValue];
if (sysVer < 8.0) {
// iOS 7 fix
self.textView.scrollEnabled = NO;
self.textView.attributedText = attributedString;
self.textView.scrollEnabled = YES;
} else {
self.textView.attributedText = attributedString;
}
}
这篇关于iOS 8 中的 UITextView 文本选择和高亮跳转的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!