Question

我想在UITextView中禁用文本编辑，只留下光标。我已经禁用了键盘，剪切复制粘贴菜单和缩放编辑模式。但是还有一个问题 - 如果我双击TextView它会选择整个单词。还有一件事，我怎样才能让光标选择任何地方，而不仅仅是结束或开始？

我做了截图，更好地描述了我的问题，但因为声誉而无法发布。所以我希望你明白我的意思。

UITextView的子类：

#import "UIUneditableTextView.h"

@implementation UIUneditableTextView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
    UIMenuController *menuController = [UIMenuController sharedMenuController];
    if (menuController) {
        [UIMenuController sharedMenuController].menuVisible = NO;
    }
    return NO;
}

-(void)addGestureRecognizerForLongPress:(UIGestureRecognizer *)gestureRecognizer
{
    if ([gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]]){
        gestureRecognizer.enabled = NO;
    }
    [super addGestureRecognizer:gestureRecognizer];
    return;
}

@end

Answer 1

由于你已经在重载文本视图，请实现gestureRecognizerShouldBegin：我做了这样的实现。

-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    // Check for gestures to prevent
    if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {
        // Check for double tap
        if (((UITapGestureRecognizer *)gestureRecognizer).numberOfTapsRequired == 2) {
            // Prevent the double tap
            return NO;
        }
    }

    // Always anything that makes it here
    return YES;
}

您可能需要考虑在这里检查长手势识别器，这不是一个黑客攻击。

Answer 2

查看UITextInput中的方法，因为这是控制选择的地方。您可以充当inputDelegate以查找何时selectionWillChange:并覆盖selectedTextRange来控制选择和插入符号。

文档：http://developer.apple.com/library/ios/documentation/UIKit/Reference/UITextInput_Protocol/Reference/Reference.html#//apple_ref/occ/intfp/UITextInput

Answer 3

这是Swift的工作示例

class TextView: UITextView {

    override func canPerformAction(action: Selector, withSender sender: AnyObject!) -> Bool {
        return false
    }

    override func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer!) -> Bool {
        if gestureRecognizer.isKindOfClass(UITapGestureRecognizer) && ((gestureRecognizer as UITapGestureRecognizer).numberOfTapsRequired == 1) {
            let touchPoint = gestureRecognizer.locationOfTouch(0, inView: self)
            let cursorPosition = closestPositionToPoint(touchPoint)
            selectedTextRange = textRangeFromPosition(cursorPosition, toPosition: cursorPosition)
            return true
        }
        else {
            return false
        }
    }

}

禁用UITextView中的文本选择

3 个答案: