MoveTableView：是一个长按拖动当前行切换位置
//// ViewController.m// MoveTableViewCell//
// Created by Evan on 16/7/6.
// Copyright © 2016年 Evan. All rights reserved.
//#import "ViewController.h"
static NSString * const MoveTableViewCellID = @"MoveTableViewCellID";
@interface ViewController ()
@property (nonatomic, weak) UITableView *tableView;
@property (nonatomic , strong) NSMutableArray *objects;
@end
@implementation ViewController
#pragma mark - Data
- (NSMutableArray *)objects {
if (!_objects) {
_objects = [NSMutableArray array];
}
return _objects;
}
#pragma mark - Control
- (UITableView *)tableView {
if (!_tableView) {
UITableView *tableView = [[UITableView alloc] init];
tableView.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height);
tableView.rowHeight = 200.f;
[tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:MoveTableViewCellID];
tableView.backgroundColor = [UIColor grayColor];
self.tableView = tableView;
[self.view addSubview:tableView];
}
return _tableView;
}
#pragma mark - LfileCycle
- (void)viewDidLoad {
[super viewDidLoad];
self.title = @"MoveTableViewCell";
NSMutableArray *listTop = [[NSMutableArray alloc] initWithArray:@[@"推荐",@"热点",@"杭州",@"社会",@"娱乐",@"科技",@"汽车",@"体育",@"订阅",@"财经",@"军事",@"国际",@"正能量",@"段子",@"趣图",@"美女",@"健康",@"教育",@"特卖",@"彩票",@"辟谣"]];
self.objects = listTop;
self.tableView.delegate = self;
self.tableView.dataSource = self;
// 给tableView添加手势
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGestureRecognized:)];
[self.tableView addGestureRecognizer:longPress];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addButtonPressed:)];
}
#pragma mark - Touch Event
- (void)longPressGestureRecognized:(id)sender {
UILongPressGestureRecognizer *longPress = (UILongPressGestureRecognizer *)sender;// 手势
UIGestureRecognizerState state = longPress.state;// 触摸事件
CGPoint location = [longPress locationInView:self.tableView];// 获取触摸事件的位置
NSIndexPath *indextPath = [self.tableView indexPathForRowAtPoint:location];// 获取位置当前的行
static UIView *snapshot = nil;// 行用户的快照正在移动View。
static NSIndexPath *sourceIndexPath = nil;//初始索引路径，在那里手势开始。
switch (state) {
case UIGestureRecognizerStateBegan: {// 长按状态
if (indextPath) {
sourceIndexPath = indextPath;
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indextPath];
snapshot = [self customSnapshoFromView:cell];
__block CGPoint center = cell.center;// 获取当前Cell的中心点
snapshot.center = center;
snapshot.alpha = 0.0;
[self.tableView addSubview:snapshot];// 把映照View添加到tableView中
[UIView animateWithDuration:0.5 animations:^{
center.y = location.y;
snapshot.transform = CGAffineTransformMakeScale(1.05, 1.05);
snapshot.alpha = 0.98;
cell.alpha = 0;
cell.hidden = YES;
}];
}
}
case UIGestureRecognizerStateChanged: {// 移动状态
CGPoint center = snapshot.center;
center.y = location.y;
snapshot.center = center;
if (indextPath && ![indextPath isEqual:sourceIndexPath]) {
[self.objects exchangeObjectAtIndex:indextPath.row withObjectAtIndex:sourceIndexPath.row];// 交换对象索引
[self.tableView moveRowAtIndexPath:sourceIndexPath toIndexPath:indextPath];// 移动tableiewCell
sourceIndexPath = indextPath;
}
}
break;
default:
{
// Clean up.
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indextPath];
cell.alpha = 0.0;
[UIView animateWithDuration:0.5 animations:^{
snapshot.center = cell.center;
snapshot.transform = CGAffineTransformIdentity;
snapshot.alpha = 0.0;
cell.alpha = 1.0;
} completion:^(BOOL finished) {
cell.hidden = NO;
sourceIndexPath = nil;
[snapshot removeFromSuperview];
snapshot = nil;
}];
}
break;
}
}
#pragma mark - Layout
// 长按时候出现Cell效果
- (UIView *)customSnapshoFromView:(UIView *)inputView {
// 用户界面图形开始图像上下文与选项
UIGraphicsBeginImageContextWithOptions(inputView.bounds.size, NO, 0);
[inputView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIView *snapshot = [[UIImageView alloc] initWithImage:image];
snapshot.layer.masksToBounds = NO;
snapshot.layer.cornerRadius = 0.0;
snapshot.layer.shadowOffset = CGSizeMake(-5.0, 0.0);
snapshot.layer.shadowRadius = 5.0;
snapshot.layer.shadowOpacity = 0.4;
return snapshot;
}
#pragma mark - UItableView Dategate && DataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return _objects.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MoveTableViewCellID forIndexPath:indexPath];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.textLabel.text = _objects[indexPath.row];
return cell;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
/**< 这里会告诉你删除第几行，然后删除，刷新 */
[self.objects removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
- (NSString *)tableView:(UITableView *)tableView titleForDeleteConfirmationButtonForRowAtIndexPath:(NSIndexPath *)indexPath {
return @"删除";
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
CATransform3D transform = CATransform3DMakeScale(0.5, 0.5, 1.0);
cell.layer.transform = transform;
[UIView beginAnimations:@"transform" context:NULL];
[UIView setAnimationDuration:0.5];
cell.layer.transform = CATransform3DIdentity;
cell.alpha = 1.0;
cell.layer.shadowOffset = CGSizeMake(0, 0);// 回到原点
[UIView commitAnimations];
}
@end
github:https://github.com/EvanYeShao/MoveTableViewCell
