UITableVIew与UICollectionView带动画删除cell时崩溃的处理
-会崩溃的原因是因为没有处理好数据源与cell之间的协调关系-
效果:
tableView的源码:
ModelCell.h + ModelCell.m
//
// ModelCell.h
// Set
//
// Created by YouXianMing on 14/11/24.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import <UIKit/UIKit.h>
@class ModelCell; @protocol ModelCellDelegate <NSObject>
@optional
- (void)modelCellButton:(ModelCell *)cell;
@end @interface ModelCell : UITableViewCell @property (nonatomic, weak) id<ModelCellDelegate> delegate; @property (nonatomic, strong) UILabel *title; @end
//
// ModelCell.m
// Set
//
// Created by YouXianMing on 14/11/24.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import "ModelCell.h" @implementation ModelCell - (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
UIButton *button = [[UIButton alloc] initWithFrame:self.bounds];
[button addTarget:self
action:@selector(buttonsEvent:)
forControlEvents:UIControlEventTouchUpInside];
[self addSubview:button]; _title = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
_title.textAlignment = NSTextAlignmentLeft;
_title.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:.f];
[self addSubview:_title];
} return self;
} - (void)buttonsEvent:(UIButton *)button {
if (_delegate && [_delegate respondsToSelector:@selector(modelCellButton:)]) {
[_delegate modelCellButton:self];
}
} @end
控制器源码:
//
// ViewController.m
// Set
//
// Created by YouXianMing on 14/11/24.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import "ViewController.h"
#import "ModelCell.h" @interface ViewController ()<UITableViewDelegate, UITableViewDataSource, ModelCellDelegate>
@property (nonatomic, strong) UITableView *tableView;
@property (nonatomic, strong) NSMutableArray *dataArray;
@end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad]; // 初始化数据源
_dataArray = [NSMutableArray array];
[_dataArray addObject:@"YouXianMing"];
[_dataArray addObject:@"Job"];
[_dataArray addObject:@"NoZuoNoDie"];
[_dataArray addObject:@"XiaoMing"];
[_dataArray addObject:@"Smith"];
[_dataArray addObject:@"K.K.K."]; // 初始化tableView
_tableView = [[UITableView alloc] initWithFrame:self.view.bounds
style:UITableViewStylePlain];
_tableView.delegate = self;
_tableView.dataSource = self;
_tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
[self.view addSubview:_tableView];
[_tableView registerClass:[ModelCell class] forCellReuseIdentifier:@"YouXianMing"];
} #pragma mark - 代理
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [_dataArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
ModelCell *cell = [tableView dequeueReusableCellWithIdentifier:@"YouXianMing"];
cell.delegate = self;
cell.title.text = _dataArray[indexPath.row]; return cell;
} - (void)modelCellButton:(ModelCell *)cell {
// 获取到cell的indexPath
NSIndexPath *indexPath = [_tableView indexPathForCell:cell]; // 删除数据源
[_dataArray removeObjectAtIndex:indexPath.row]; // 执行删除动画效果
[_tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationLeft];
} @end
UICollectionView源码:
ModelCell.h + ModelCell.m
//
// ModelCell.h
// collection
//
// Created by YouXianMing on 14/11/25.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import <UIKit/UIKit.h>
@class ModelCell; @protocol ModelCellDelegate <NSObject>
@optional
- (void)modelCellEvent:(ModelCell *)cell;
@end @interface ModelCell : UICollectionViewCell @property (nonatomic, weak) id<ModelCellDelegate> delegate;
@property (nonatomic, strong) UILabel *title; @end
//
// ModelCell.m
// collection
//
// Created by YouXianMing on 14/11/25.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import "ModelCell.h" @implementation ModelCell - (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
_title = [[UILabel alloc] initWithFrame:self.bounds];
_title.textAlignment = NSTextAlignmentCenter;
[self addSubview:_title];
self.layer.borderWidth = .f; UIButton *button = [[UIButton alloc] initWithFrame:self.bounds];
[button addTarget:self
action:@selector(buttonEvent:)
forControlEvents:UIControlEventTouchUpInside];
[self addSubview:button];
}
return self;
} - (void)buttonEvent:(UIButton *)button {
if (_delegate && [_delegate respondsToSelector:@selector(modelCellEvent:)]) {
[_delegate modelCellEvent:self];
}
} @end
CellLayout.h + CellLayout.m
//
// CellLayout.h
// collection
//
// Created by YouXianMing on 14/11/25.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import <UIKit/UIKit.h> @interface CellLayout : UICollectionViewFlowLayout @end
//
// CellLayout.m
// collection
//
// Created by YouXianMing on 14/11/25.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import "CellLayout.h" @implementation CellLayout - (instancetype)init {
self = [super init];
if (self) {
self.itemSize = CGSizeMake([UIScreen mainScreen].bounds.size.width / .f, ); // 单元格尺寸
self.sectionInset = UIEdgeInsetsMake(, , , ); // 单元格边缘
self.minimumInteritemSpacing = ; // 横排单元格最小间隔
self.minimumLineSpacing = ; // 单元格最小行间距
}
return self;
} @end
控制器源码:
//
// ViewController.m
// collection
//
// Created by YouXianMing on 14/11/25.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import "ViewController.h"
#import "CellLayout.h"
#import "ModelCell.h" @interface ViewController ()<UICollectionViewDataSource, UICollectionViewDelegate, ModelCellDelegate>
@property (nonatomic, strong) UICollectionView *collectionView;
@property (nonatomic, strong) NSMutableArray *dataArray;
@end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad]; // 初始化数据源
_dataArray = [NSMutableArray array];
[_dataArray addObject:@"YouXianMing"];
[_dataArray addObject:@"Job"];
[_dataArray addObject:@"NoZuoNoDie"];
[_dataArray addObject:@"XiaoMing"];
[_dataArray addObject:@"Smith"];
[_dataArray addObject:@"K.K.K."]; // 创建出UICollectionView
_collectionView = [[UICollectionView alloc] initWithFrame:self.view.bounds
collectionViewLayout:[CellLayout new]];
_collectionView.backgroundColor = [UIColor whiteColor];
_collectionView.delegate = self;
_collectionView.dataSource = self;
[_collectionView registerClass:[ModelCell class] forCellWithReuseIdentifier:@"YouXianMing"];
[self.view addSubview:_collectionView];
} #pragma mark - 代理
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return [_dataArray count];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
ModelCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"YouXianMing"
forIndexPath:indexPath];
cell.title.text = _dataArray[indexPath.row];
cell.delegate = self; return cell;
}
- (void)modelCellEvent:(ModelCell *)cell {
// 获取到cell的indexPath
NSIndexPath *indexPath = [_collectionView indexPathForCell:cell]; // 删除数据源
[_dataArray removeObjectAtIndex:indexPath.row]; // 执行删除动画效果
[_collectionView deleteItemsAtIndexPaths:@[indexPath]];
} @end
分析:
注意:
1. 先取得cell的indexPath
2. 删除数据源
3. 执行删除cell的操作,带动画
执行delete操作的时候,并不会刷新数据源,不会执行reloadData,注意.