ios - 选择里面没有选择文本的textView？

Question

我在 UITableViewCell 中有一个 UITextView。我希望 UITextView 可以选择，但不能向其发送文本。当 Menu Controller 出现并且我想执行复制操作时，复制里面的所有文本，而不仅仅是一部分。

我想要像 Messenger 应用这样的东西:

目前我有:

提前致谢!

Answer 1

事实上这并不那么容易，因为在路上会出现一些奇怪的东西，但我设法创建了一个定制的。

步骤如下:

1. 创建UITextView的子类
2. 覆盖 canPerformAction: withSender: 用于过滤菜单的默认 Action 弹出。
3. 配置 textView 以便无法编辑 或 选择。
4. 编辑在菜单上提供操作和按钮的 UIMenuController 项
5. 为每个 UIMenuItem 添加不同的选择器 ****(这是因为选择器的发送者不是 UIMenuItem，而是 UIMenuController 这导致了另一件事。查看 here 了解更多信息。我为此提供了一个 gist)

代码

废话不多说，上代码:

EBCustomTextView.h

//
//  EBCustomTextView.h
//  TestProject
//
//  Created by Erid Bardhaj on 3/8/16.
//  Copyright © 2016 Erid Bardhaj. All rights reserved.
//

#import <UIKit/UIKit.h>

typedef NS_ENUM(NSInteger, EBCustomTextViewMenuAction) {
    EBCustomTextViewMenuActionCopy,
    EBCustomTextViewMenuActionDefine,
    EBCustomTextViewMenuActionRead
};

@class EBCustomTextView;
@protocol EBCustomTextViewMenuActionDelegate <NSObject>

- (void)customTextView:(EBCustomTextView *)textView didSelectMenuAction:(EBCustomTextViewMenuAction)action;

@end

@interface EBCustomTextView : UITextView

@property (weak, nonatomic) id<EBCustomTextViewMenuActionDelegate> menuActionDelegate;

@end

EBCustomTextView.m

//
//  EBCustomTextView.m
//  TestProject
//
//  Created by Erid Bardhaj on 3/8/16.
//  Copyright © 2016 Erid Bardhaj. All rights reserved.
//

#import "EBCustomTextView.h"

@implementation EBCustomTextView {
    EBCustomTextViewMenuAction currentAction;
}

- (void)awakeFromNib {
    [super awakeFromNib];

    // Configure the textView
    self.editable = NO;
    self.selectable = NO;
}

#pragma mark - Datasource

- (NSArray *)items {
    UIMenuItem *item = [[UIMenuItem alloc] initWithTitle:@"Copy" action:@selector(copyMenuItemPressed)];
    UIMenuItem *item1 = [[UIMenuItem alloc] initWithTitle:@"Define" action:@selector(defineMenuItemPressed)];
    UIMenuItem *item2 = [[UIMenuItem alloc] initWithTitle:@"Read" action:@selector(readMenuItemPressed)];

    return @[item, item1, item2];
}


#pragma mark - Actions

- (void)copyMenuItemPressed {
    if ([self.menuActionDelegate respondsToSelector:@selector(customTextView:didSelectMenuAction:)]) {
        [self.menuActionDelegate customTextView:self didSelectMenuAction:EBCustomTextViewMenuActionCopy];
    }
}

- (void)defineMenuItemPressed {
    if ([self.menuActionDelegate respondsToSelector:@selector(customTextView:didSelectMenuAction:)]) {
        [self.menuActionDelegate customTextView:self didSelectMenuAction:EBCustomTextViewMenuActionDefine];
    }
}

- (void)readMenuItemPressed {
    if ([self.menuActionDelegate respondsToSelector:@selector(customTextView:didSelectMenuAction:)]) {
        [self.menuActionDelegate customTextView:self didSelectMenuAction:EBCustomTextViewMenuActionRead];
    }
}

#pragma mark - Private

- (void)menuItemPressedAtIndex:(NSInteger)index {
    currentAction = index;

    if ([self.menuActionDelegate respondsToSelector:@selector(customTextView:didSelectMenuAction:)]) {
        [self.menuActionDelegate customTextView:self didSelectMenuAction:currentAction];
    }
}

#pragma mark Helpers

- (void)showMenuController {
    UIMenuController *theMenu = [UIMenuController sharedMenuController];
    theMenu.menuItems = [self items];
    [theMenu update];

    CGRect selectionRect = CGRectMake (0, 0, self.contentSize.width, self.contentSize.height);
    [theMenu setTargetRect:selectionRect inView:self];
    [theMenu setMenuVisible:(theMenu.isMenuVisible) ? NO : YES animated:YES];
}

#pragma mark - Overridings

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    // Filter any action for this textView except our custom ones
    if (action == @selector(copyMenuItemPressed) || action == @selector(defineMenuItemPressed) || action == @selector(readMenuItemPressed)) {
        return YES;
    }
    return NO;
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *theTouch = [touches anyObject];

    if ([theTouch tapCount] == 1  && [self becomeFirstResponder]) {
        [self showMenuController];
    }
}


@end

实现

将您的 textView 的类设置为 EBCustomTextView 并符合 EBCustomTextViewMenuActionDelegate

界面

@interface ViewController () <EBCustomTextViewMenuActionDelegate>

viewDidLoad

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    self.textView.menuActionDelegate = self;
}

协议(protocol)一致性

#pragma mark - Delegation

#pragma mark EBCustomTextViewMenuActionDelegate 

- (void)customTextView:(EBCustomTextView *)textView didSelectMenuAction:(EBCustomTextViewMenuAction)action {
    switch (action) {
        case EBCustomTextViewMenuActionCopy:
            NSLog(@"Copy Action");
            break;

        case EBCustomTextViewMenuActionRead:
            NSLog(@"Read Action");
            break;

        case EBCustomTextViewMenuActionDefine:
            NSLog(@"Define Action");
            break;

        default:
            break;
    }
}

输出

享受 :)