4

免责声明:我知道调整这类东西不是最佳实践,因为它可能会随着 Apple 决定改变其内部行为而中断。

有一些解决方案,例如https://stackoverflow.com/a/12511432/271150,它们似乎适用于以前的 iOS 版本,但不适用于 iOS 7。

查看控件层次结构时,我可以看到 UITableViewCellScrollView 中有一个 UITableViewCellDeleteConfirmationView。但是通过查看 layoutSubviews 或 willTransitionToState 中的 SubViews 集合,只有我自己的视图,UITableViewCellDeleteConfirmationView 没有出现。

在此处输入图像描述

那么,有没有人想出如何修改默认删除按钮/视图?

4

3 回答 3

4

我了解您可能不想覆盖 Apple 的整个实现来编辑表格视图单元格,但我的应用程序遇到了类似的问题。就我而言,当用户从左向右滑动时,我需要两个按钮(更多和丢失)来显示,就像在 iOS7 的新提醒应用程序中一样。而不是使用:

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath

我创建了一个自定义单元格,将按钮隐藏在顶层下方,并使用平移手势识别器移动顶层,显示下方的按钮。因此,我可以完全控制显示哪些按钮以及它们是什么颜色等(见下文)。

static CGFloat const kEditButtonWidth = 82.0;

@interface MyCustomCell ()
@property (nonatomic, assign) CGFloat firstX;
@property (nonatomic, assign) CGFloat firstY;
@property (nonatomic, strong) UIView *topLayer;
@property (nonatomic, strong) UIButton *moreButton;
@property (nonatomic, strong) UIButton *lostButton;
@property (nonatomic, strong) UILabel *titleLabel;
@end

@implementation MyCustomCell

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier];
    if (self) {

        // BOTTOM LAYER (MORE AND LOST BUTTONS)
        UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [aButton setFrame:CGRectZero];
        [aButton setTitle:@"More" forState:UIControlStateNormal];
        [aButton setTitleShadowColor:[UIColor clearColor] forState:UIControlStateNormal];
        [aButton setBackgroundColor:[UIColor colorWithRed:0.78 green:0.78 blue:0.78 alpha:1.0]];
        [[self contentView] addSubview:aButton];
        [self setMoreButton:aButton];

        aButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [aButton setFrame:CGRectZero];
        [aButton setTitle:@"Lost" forState:UIControlStateNormal];
        [aButton setTitleShadowColor:[UIColor clearColor] forState:UIControlStateNormal];
        [aButton setBackgroundColor:[UIColor colorWithRed:1.00f green:0.23f blue:0.19f alpha:1.00f]];
        [[self contentView] addSubview:aButton];
        [self setLostButton:aButton];

        // TOP LAYER
        UIView *aView = [[UIView alloc] initWithFrame:CGRectZero];
        [aView setBackgroundColor:[UIColor whiteColor]];
        [[self contentView] addSubview:aView];
        [self setTopLayer:aView];

        UIPanGestureRecognizer *aPanRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureAction:)];
        [aPanRecognizer setMinimumNumberOfTouches:1];
        [aPanRecognizer setMaximumNumberOfTouches:1];
        [aView addGestureRecognizer:aPanRecognizer];

        // title label
        UILabel *aLabel = [[UILabel alloc] initWithFrame:CGRectZero];
        [aView addSubview:aLabel];
        [self setTitleLabel:aLabel];
    }
    return self;
}

- (void)layoutSubviews {

    [super layoutSubviews];

    CGRect bounds = [[self contentView] bounds];
    CGRect frame = CGRectZero;

    // BOTTOM LAYER (MORE AND LOST BUTTONS)
    frame.origin.x = bounds.size.width-(kEditButtonWidth+kEditButtonWidth); // two buttons wide
    frame.size.width = kEditButtonWidth;
    frame.size.height = bounds.size.height;
    [[self moreButton] setFrame:frame];

    frame.origin.x += kEditButtonWidth;
    [[self lostButton] setFrame:frame];

    // TOP LAYER
    frame = bounds;
    CGPoint anchorPoint = CGPointMake(0.0f, [[[self topLayer] layer] anchorPoint].y);
    [[[self topLayer] layer] setAnchorPoint:anchorPoint];
    [[self topLayer] setFrame:frame];

    // title label
    frame.origin.x = 20.0;
    frame.origin.y = 4.0;
    frame.size.width = bounds.size.width-40.0;
    frame.size.height = 21.0;
    [[self titleLabel] setFrame:frame];
}

- (void)panGestureAction:(id)sender {

    // on the first touch, get the center coordinates (x and y) of the view
    CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self];
    if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
        [self setFirstX:[[sender view] center].x];
        [self setFirstY:[[sender view] center].y];
    }

    // add translated point to reference points
    translatedPoint = CGPointMake([self firstX]+translatedPoint.x, [self firstY]);
    [[sender view] setCenter:translatedPoint];

    // when pan ends (set final x to be either back to zero or showing buttons)
    if ([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
        CGFloat finalX = translatedPoint.x+(0.30*[(UIPanGestureRecognizer*)sender velocityInView:self].x);
        if (finalX < -1.0f*FMEditButtonWidth) {
            finalX = -2.0f*FMEditButtonWidth;
            [self setEditMode:YES];
        } else {
            finalX = 0.0f;
            [self setEditMode:NO];
        }

        // animate view
        [UIView animateWithDuration:1.0 delay:0.0 usingSpringWithDamping:1.0f initialSpringVelocity:1.0f options:UIViewAnimationOptionCurveEaseOut | UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionBeginFromCurrentState animations:^{
            [[sender view] setCenter:CGPointMake(finalX, [self firstY])];
        } completion:NULL];
    }
}

@end

希望这可以帮助。

于 2013-10-17T06:46:17.673 回答
0

您看不到内部视图的原因是删除按钮视图尚不存在,或者它还不是视图层次结构的一部分layoutSubviewswillTransitionToState:为了“看到”它,您需要推迟一点浏览视图层次结构的代码,并允许操作系统同时创建/添加视图:

- (void)willTransitionToState:(UITableViewCellStateMask)state
{
    [super willTransitionToState:state];

    if (state & UITableViewCellStateShowingDeleteConfirmationMask)
    {
        [self performSelector:@selector(findDeleteButtonViewThroughViewHierarchy:) withObject:self.subviews afterDelay:0];
    }
}

请注意,这是一个脆弱的解决方案,因为它基于可能随时更改的 Apple 内部实现。

在这里看到一个(几乎)完整的例子:

自定义 iOS 7 删除按钮

于 2014-01-09T13:24:26.957 回答
-1

不确定这是否适用于 ios 7,但请看一下:

(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{

  if (editingStyle == UITableViewCellEditingStyleDelete)

   {

    //   Your Code

    }
}
于 2013-10-09T20:29:25.210 回答