做侧滑的时候发现一个问题,当一个UITableView的cell有的有侧滑,有的没有,当用editActionsForRowAtIndexPath方法的时候发现有点问题,查看了下api,需要用到canEditRowAtIndexPath这个方法

OC侧滑删除-LMLPHP

#import "SkidSidewaysViewController.h"

@interface SkidSidewaysViewController ()<UITableViewDelegate,UITableViewDataSource>
@property(nonatomic,strong)NSMutableArray *dataArr;
@property(nonatomic,strong)UITableView *tableView;
@end @implementation SkidSidewaysViewController
#define Identifier @"cell"
-(NSMutableArray *)dataArr{
if(!_dataArr){
_dataArr = [NSMutableArray array];
for(int i=0;i<20;i++){
[_dataArr addObject:[NSString stringWithFormat:@"%d",arc4random()%3]];
}
}
return _dataArr;
} - (void)viewDidLoad {
[super viewDidLoad];
self.tableView = [[UITableView alloc]initWithFrame:self.view.bounds];
[self.view addSubview:self.tableView];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:Identifier];
}
#pragma mark UITableViewDelegate,UITableViewDataSource
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return self.dataArr.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Identifier forIndexPath:indexPath];
cell.textLabel.text = self.dataArr[indexPath.row];
return cell;
}
//判断是否有侧滑
-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{
if([self.dataArr[indexPath.row] isEqualToString:@"0"]){
return NO;
}
return YES;
}
//判断侧滑按钮一共有几个
- (nullable NSArray<UITableViewRowAction *> *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath{
NSMutableArray *acitonArr = [NSMutableArray array];
for(int i=0;i<[self.dataArr[indexPath.row] intValue];i++){
UITableViewRowAction *action = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:[NSString stringWithFormat:@"%d",i] handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) { }];
action.backgroundColor = [UIColor redColor];
[acitonArr addObject:action];
} return acitonArr;
}
@end
05-08 08:34