当用户在表格视图中滑动单元格时，如何创建一个“更多”按钮(就像ios 7中的邮件应用程序)
我一直在这里和Cocoa Touch论坛上寻找这些信息，但我似乎找不到答案，我希望比我更聪明的人能给我一个解决方案。
我希望当用户滑动一个表格视图单元格时，显示多个编辑按钮(默认是删除按钮)。 在iOS 7的邮件应用程序中，你可以滑动删除，但会出现一个“更多”按钮。
当前回答
以下内容可能会帮到你:
-(NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewRowAction *button = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Button 1" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
{
NSLog(@"Action to perform with Button 1");
}];
button.backgroundColor = [UIColor greenColor]; //arbitrary color
UITableViewRowAction *button2 = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Button 2" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
{
NSLog(@"Action to perform with Button2!");
}];
button2.backgroundColor = [UIColor blueColor]; //arbitrary color
return @[button, button2]; //array with all the buttons you want. 1,2,3, etc...
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
// you need to implement this method too or nothing will work:
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
return YES; //tableview must be editable or nothing will work...
}
其他回答
这里有一个简单的解决办法。它能够在UITableViewCell中显示和隐藏自定义UIView。 显示逻辑包含在从UITableViewCell, BaseTableViewCell扩展的类中。
BaseTableViewCell.h
#import <UIKit/UIKit.h>
@interface BaseTableViewCell : UITableViewCell
@property(nonatomic,strong)UIView* customView;
-(void)showCustomView;
-(void)hideCustomView;
@end
BaseTableViewCell。米
#import "BaseTableViewCell.h"
@interface BaseTableViewCell()
{
BOOL _isCustomViewVisible;
}
@end
@implementation BaseTableViewCell
- (void)awakeFromNib {
// Initialization code
}
-(void)prepareForReuse
{
self.customView = nil;
_isCustomViewVisible = NO;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
-(void)showCustomView
{
if(nil != self.customView)
{
if(!_isCustomViewVisible)
{
_isCustomViewVisible = YES;
if(!self.customView.superview)
{
CGRect frame = self.customView.frame;
frame.origin.x = self.contentView.frame.size.width;
self.customView.frame = frame;
[self.customView willMoveToSuperview:self.contentView];
[self.contentView addSubview:self.customView];
[self.customView didMoveToSuperview];
}
__weak BaseTableViewCell* blockSelf = self;
[UIView animateWithDuration:.5 animations:^(){
for(UIView* view in blockSelf.contentView.subviews)
{
CGRect frame = view.frame;
frame.origin.x = frame.origin.x - blockSelf.customView.frame.size.width;
view.frame = frame;
}
}];
}
}
}
-(void)hideCustomView
{
if(nil != self.customView)
{
if(_isCustomViewVisible)
{
__weak BaseTableViewCell* blockSelf = self;
_isCustomViewVisible = NO;
[UIView animateWithDuration:.5 animations:^(){
for(UIView* view in blockSelf.contentView.subviews)
{
CGRect frame = view.frame;
frame.origin.x = frame.origin.x + blockSelf.customView.frame.size.width;
view.frame = frame;
}
}];
}
}
}
@end
要获得此功能，只需从BaseTableViewCell扩展您的表视图单元格。
接下来, 在UIViewController中，它实现了UITableViewDelegate，创建了两个手势识别器来处理左右滑动。
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self.tableView registerNib:[UINib nibWithNibName:CUSTOM_CELL_NIB_NAME bundle:nil] forCellReuseIdentifier:CUSTOM_CELL_ID];
UISwipeGestureRecognizer* leftSwipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleLeftSwipe:)];
leftSwipeRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
[self.tableView addGestureRecognizer:leftSwipeRecognizer];
UISwipeGestureRecognizer* rightSwipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleRightSwipe:)];
rightSwipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[self.tableView addGestureRecognizer:rightSwipeRecognizer];
}
然后添加两个滑动处理程序
- (void)handleLeftSwipe:(UISwipeGestureRecognizer*)recognizer
{
CGPoint point = [recognizer locationInView:self.tableView];
NSIndexPath* index = [self.tableView indexPathForRowAtPoint:point];
UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:index];
if([cell respondsToSelector:@selector(showCustomView)])
{
[cell performSelector:@selector(showCustomView)];
}
}
- (void)handleRightSwipe:(UISwipeGestureRecognizer*)recognizer
{
CGPoint point = [recognizer locationInView:self.tableView];
NSIndexPath* index = [self.tableView indexPathForRowAtPoint:point];
UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:index];
if([cell respondsToSelector:@selector(hideCustomView)])
{
[cell performSelector:@selector(hideCustomView)];
}
}
现在，在UITableViewDelegate的cellForRowAtIndexPath中，你可以创建自定义UIView并将它附加到dequeuedcell中。
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
CustomCellTableViewCell* cell = (CustomCellTableViewCell*)[tableView dequeueReusableCellWithIdentifier:@"CustomCellTableViewCell" forIndexPath:indexPath];
NSArray* nibViews = [[NSBundle mainBundle] loadNibNamed:@"CellCustomView"
owner:nil
options:nil];
CellCustomView* customView = (CellCustomView*)[ nibViews objectAtIndex: 0];
cell.customView = customView;
return cell;
}
当然，这种加载自定义UIView的方式只适用于这个例子。按照您的意愿管理它。
你需要子类化UITableViewCell和子类化方法willTransitionToState:(UITableViewCellStateMask)状态，该状态在用户滑动单元格时被调用。状态标志会让你知道是否显示删除按钮，并在那里显示/隐藏更多按钮。
不幸的是，这个方法既没有给你Delete按钮的宽度，也没有给你动画时间。所以你需要观察并将More按钮的帧和动画时间硬编码到你的代码中(我个人认为苹果需要在这方面做些什么)。
Swift 3实际回答
这是你唯一需要的功能。对于自定义操作，您不需要CanEdit或CommitEditingStyle函数。
func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
let action1 = UITableViewRowAction(style: .default, title: "Action1", handler: {
(action, indexPath) in
print("Action1")
})
action1.backgroundColor = UIColor.lightGray
let action2 = UITableViewRowAction(style: .default, title: "Action2", handler: {
(action, indexPath) in
print("Action2")
})
return [action1, action2]
}
约翰尼的答案是正确的。我只是在objective-c中添加了下面的代码，以便初学者(以及那些拒绝学习Swift语法的人:)
确保你声明了uitableviewdelegate并拥有以下方法:
-(NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewRowAction *button = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Button 1" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
{
NSLog(@"Action to perform with Button 1");
}];
button.backgroundColor = [UIColor greenColor]; //arbitrary color
UITableViewRowAction *button2 = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Button 2" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
{
NSLog(@"Action to perform with Button2!");
}];
button2.backgroundColor = [UIColor blueColor]; //arbitrary color
return @[button, button2]; //array with all the buttons you want. 1,2,3, etc...
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
// you need to implement this method too or nothing will work:
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES; //tableview must be editable or nothing will work...
}
斯威夫特4
func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
let delete = UIContextualAction(style: .destructive, title: "Delete") { (action, sourceView, completionHandler) in
print("index path of delete: \(indexPath)")
completionHandler(true)
}
let rename = UIContextualAction(style: .normal, title: "Edit") { (action, sourceView, completionHandler) in
print("index path of edit: \(indexPath)")
completionHandler(true)
}
let swipeActionConfig = UISwipeActionsConfiguration(actions: [rename, delete])
swipeActionConfig.performsFirstActionWithFullSwipe = false
return swipeActionConfig
}
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