之前想在cell左滑的时候添加更多的按钮而不是只有‘删除’按钮如下所示，貌似不是一件简单的事。但是现在只要实现几个方法就行了。
代码写的比较垃圾，重在理解这个知识。。
具体代码：
//
// TableViewController.m
// ios8_tableview(左滑添加按钮)
//
// Created by mudy on 15/8/21.
// Copyright (c) 2015年 mudy. All rights reserved.
//
#import "TableViewController.h"
@interface TableViewController ()
@property (nonatomic,strong)NSMutableArray *dataSource;
@end
@implementation TableViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.dataSource = [NSMutableArray array];
self.dataSource = [@[@"mudy1",@"mudy2",@"mudy3",@"mudy4",@"mudy5",@"mudy6"]mutableCopy];
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
self.navigationItem.rightBarButtonItem = self.editButtonItem;
self.refreshControl = [UIRefreshControl new];
self.refreshControl.tintColor = [UIColor redColor];
[self.refreshControl addTarget:self action:@selector(refreshControl:) forControlEvents:UIControlEventValueChanged];
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]
initWithTarget:self action:@selector(longPressGestureRecognized:)];
[self.tableView addGestureRecognizer:longPress];
}
- (IBAction)longPressGestureRecognized:(UILongPressGestureRecognizer *)sender {
UILongPressGestureRecognizer *longPress = (UILongPressGestureRecognizer *)sender;
UIGestureRecognizerState state = longPress.state;
CGPoint location = [longPress locationInView:self.tableView];
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:location];
static UIView *snapshot = nil; ///< A snapshot of the row user is moving.
static NSIndexPath *sourceIndexPath = nil; ///< Initial index path, where gesture begins.
switch (state) {
case UIGestureRecognizerStateBegan: {
if (indexPath) {
sourceIndexPath = indexPath;
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
// Take a snapshot of the selected row using helper method.
snapshot = [self customSnapshotFromView:cell];
// Add the snapshot as subview, centered at cell's center...
__block CGPoint center = cell.center;
snapshot.center = center;
snapshot.alpha = 0.0;
[self.tableView addSubview:snapshot];
[UIView animateWithDuration:0.25 animations:^{
// Offset for gesture location.
center.y = location.y;
snapshot.center = center;
snapshot.transform = CGAffineTransformMakeScale(1.05, 1.05);
snapshot.alpha = 0.98;
// Black out.
cell.backgroundColor = [UIColor blackColor];
} completion:nil];
}
break;
}
case UIGestureRecognizerStateChanged: {
CGPoint center = snapshot.center;
center.y = location.y;
snapshot.center = center;
// Is destination valid and is it different from source?
if (indexPath && ![indexPath isEqual:sourceIndexPath]) {
// ... update data source.
[self.dataSource exchangeObjectAtIndex:indexPath.row withObjectAtIndex:sourceIndexPath.row];
// ... move the rows.
[self.tableView moveRowAtIndexPath:sourceIndexPath toIndexPath:indexPath];
// ... and update source so it is in sync with UI changes.
sourceIndexPath = indexPath;
}
break;
}
default: {
// Clean up.
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:sourceIndexPath];
[UIView animateWithDuration:0.25 animations:^{
snapshot.center = cell.center;
snapshot.transform = CGAffineTransformIdentity;
snapshot.alpha = 0.0;
// Undo the black-out effect we did.
cell.backgroundColor = [UIColor whiteColor];
} completion:^(BOOL finished) {
[snapshot removeFromSuperview];
snapshot = nil;
}];
sourceIndexPath = nil;
break;
}
}
}
- (UIView *)customSnapshotFromView:(UIView *)inputView {
UIView *snapshot = [inputView snapshotViewAfterScreenUpdates:YES];
snapshot.layer.masksToBounds = NO;
snapshot.layer.cornerRadius = 0.0;
snapshot.layer.shadowOffset = CGSizeMake(-1.0, 0.0);
snapshot.layer.shadowRadius = 1.0;
snapshot.layer.shadowOpacity = 0.4;
return snapshot;
}
-(void)refreshControl:(id)sender{
[NSThread sleepForTimeInterval:5.0];//刷新5秒钟
self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"刷新ing"];
[self.tableView reloadData];
[self.refreshControl endRefreshing];
NSLog(@"really?");
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
return self.dataSource.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
cell.textLabel.text = [NSString stringWithFormat:@"%@",self.dataSource[indexPath.row]];
// Configure the cell...
return cell;
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
// Override to support editing the table view.
//这个方法并没有走，但是也不能删掉这个方法
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
-(NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath{
//设置删除按钮
UITableViewRowAction *deleteRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:@"删除" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
//要先删除数据源里的数据
[self.dataSource removeObjectAtIndex:indexPath.row];
[self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"删除" message:@"删除成功" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alertView show];
}];
//设置收藏按钮
UITableViewRowAction *collection = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"收藏" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"收藏" message:@"收藏成功" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alertView show];
[self.tableView reloadData];
}];
//设置置顶按钮
UITableViewRowAction *topRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"置顶" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
topRowAction.backgroundColor = [UIColor yellowColor];
[self.dataSource exchangeObjectAtIndex:indexPath.row withObjectAtIndex:0];
NSIndexPath *first = [NSIndexPath indexPathForRow:0 inSection:indexPath.section];
// NSIndexPath *f =[NSIndexPath inde]
[tableView moveRowAtIndexPath:indexPath toIndexPath:first];
}];
deleteRowAction.backgroundEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
topRowAction.backgroundColor = [UIColor blueColor];
deleteRowAction.backgroundColor = [UIColor grayColor];
collection.backgroundColor = [UIColor brownColor];
return @[deleteRowAction,collection,topRowAction];
}
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
[tableView moveRowAtIndexPath:fromIndexPath toIndexPath:toIndexPath];
}
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the item to be re-orderable.
return YES;
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
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