ios – iPad撤消按钮(a-la Keynote和其他应用程序)

概述在Keynote(和其他应用程序)中,我注意到做撤销/重做的“标准”界面是通过在工具栏上提供撤消按钮. 单击按钮(始终启用)取消最近的 *** 作. (如果没有最近的撤消 *** 作,它将显示撤消/重做菜单). 长按“撤消”按钮可打开“撤消/重做”菜单. 我搜索了实现这个的方法,到目前为止我找到的最佳答案是在following link. 我想知道是否有人知道更简单的方法？ 谢谢！ 在回顾了所有方法并与朋友讨论之 @H_502_4@ 在Keynote(和其他应用程序)中,我注意到做撤销/重做的“标准”界面是通过在工具栏上提供撤消按钮.

单击按钮(始终启用)取消最近的 *** 作.
(如果没有最近的撤消 *** 作,它将显示撤消/重做菜单).

长按“撤消”按钮可打开“撤消/重做”菜单.

我搜索了实现这个的方法,到目前为止我找到的最佳答案是在following link.

我想知道是否有人知道更简单的方法？

谢谢！

@H_502_4@解决方法 在回顾了所有方法并与朋友讨论之后,下面是我使用的解决方案,对于UIbarbuttonItem,它响应两个点击并长按(TapOrLongPressbarbuttonItem).

它基于以下原则：

>子类UIbarbuttonItem
>使用自定义视图(因此处理长按非常简单 – 因为我们的自定义视图对长按手势处理程序没有问题…)

…到目前为止 – 这种方法是在other SO thread – 我不喜欢这种方法,因为我找不到足够简单的方法使自定义视图看起来像iPad导航栏按钮… Soooo …

使用水娄UIGlossyButton(感谢水！).这个用法封装在子类中……

结果代码如下：

@protocol TapOrPressbuttonDelegate;@interface TapOrPressbarbuttonItem : UIbarbuttonItem {      UIGlossybutton* _tapOrPressbutton;    __weak ID<TapOrPressbuttonDelegate> _delegate;}- (ID)initWithTitle:(Nsstring*)Title andDelegate:(ID<TapOrPressbuttonDelegate>)delegate;@end@protocol TapOrPressbuttonDelegate<NSObject>- (voID)buttonTapped:(UIbutton*)button withbarbuttonItem:(UIbarbuttonItem*)barbuttonItem;- (voID)buttonLongpressed:(UIbutton*)button withbarbuttonItem:(UIbarbuttonItem*)barbuttonItem;@end@implementation TapOrPressbarbuttonItem- (voID)buttonLongpressed:(UILongPressGestureRecognizer*)gesture {    if (gesture.state != UIGestureRecognizerStateBegan)        return;    if([_delegate respondsToSelector:@selector(buttonLongpressed:withbarbuttonItem:)]) {        [_delegate buttonLongpressed:_tapOrPressbutton withbarbuttonItem:self];    }}- (voID)buttonTapped:(ID)sender {    if (sender != _tapOrPressbutton) {        return;    }    if([_delegate respondsToSelector:@selector(buttonTapped:withbarbuttonItem:)]) {        [_delegate buttonTapped:_tapOrPressbutton withbarbuttonItem:self];    }   }- (ID)initWithTitle:(Nsstring*)Title andDelegate:(ID<TapOrPressbuttonDelegate>)delegate {    if (self = [super init]) {        // Store delegate reference        _delegate = delegate;        // Create the customm button that will have the iPad-nav-bar-default appearance         _tapOrPressbutton = [UIGlossybutton buttonWithType:UIbuttonTypeCustom];        [_tapOrPressbutton setTitle:Title forState:UIControlStatenormal];        [_tapOrPressbutton setNavigationbuttonWithcolor:[UIcolor colorWithRed:123.0/255 green:130.0/255 blue:139.0/255 Alpha:1.0]];        // Calculate wIDth...        CGSize labelSize = CGSizeMake(1000,30);        labelSize = [Title sizeWithFont:_tapOrPressbutton.TitleLabel.Font constrainedToSize:labelSize lineBreakMode:UIlineBreakModeMIDdleTruncation];        _tapOrPressbutton.frame = CGRectMake(0,labelSize.wIDth+20,30);        // Add a handler for a tap        [_tapOrPressbutton addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventtouchUpInsIDe];        // Add a handler for a long-press        UILongPressGestureRecognizer* buttonLongPress_ = [[UILongPressGestureRecognizer alloc] initWithTarget:self                                                                                                       action:@selector(buttonLongpressed:)];        [_tapOrPressbutton addGestureRecognizer:buttonLongPress_];        // Set this button as the custom vIEw of the bar item...        self.customVIEw = _tapOrPressbutton;    }    return self;}// Safe guards...- (ID)initWithImage:(UIImage *)image style:(UIbarbuttonItemStyle)style target:(ID)target action:(SEL)action {    NSLog(@"%s not supported!",__FUNCTION__);    return nil;}- (ID)initWithImage:(UIImage *)image landscapeImagePhone:(UIImage *)landscapeImagePhone style:(UIbarbuttonItemStyle)style target:(ID)target action:(SEL)action {    NSLog(@"%s not supported!",__FUNCTION__);    return nil;}- (ID)initWithTitle:(Nsstring *)Title style:(UIbarbuttonItemStyle)style target:(ID)target action:(SEL)action {    NSLog(@"%s not supported!",__FUNCTION__);    return nil;}- (ID)initWithbarbuttonSystemItem:(UIbarbuttonSystemItem)systemItem target:(ID)target action:(SEL)action {    NSLog(@"%s not supported!",__FUNCTION__);    return nil;}- (ID)initWithCustomVIEw:(UIVIEw *)customVIEw {    NSLog(@"%s not supported!",__FUNCTION__);    return nil;}@end

你需要做的就是：

1.实例化如下：

TapOrPressbarbuttonItem* undoMenubutton = [[TapOrPressbarbuttonItem alloc] initWithTitle:NSLocalizedString(@"Undo",@"Undo Menu Title") andDelegate:self];

2.将按钮连接到导航栏：

[self.navigationItem setleftbarbuttonItem:undoMenubutton animated:NO];

3.实现TapOrPressbuttonDelegate协议,你就完成了……

-(voID)buttonTapped:(UIbutton*)button withbarbuttonItem:(UIbarbuttonItem*)barbuttonItem {    [self menuItemUndo:barbuttonItem];}-(voID)buttonLongpressed:(UIbutton*)button withbarbuttonItem:(UIbarbuttonItem*)barbuttonItem {    [self undoMenuClicked:barbuttonItem];}

希望这有助于其他人……

@H_502_4@ @H_502_4@ @H_502_4@ @H_502_4@ 总结

以上是内存溢出为你收集整理的ios – iPad撤消按钮(a-la Keynote和其他应用程序)全部内容，希望文章能够帮你解决ios – iPad撤消按钮(a-la Keynote和其他应用程序)所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。