动态加载实例NSSelectorFromString

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    _dataArray = [NSMutableArray array];
    //不带参数的方法
//    [_dataArray addObject:@[@"第一行",@"load1"]];
//    [_dataArray addObject:@[@"第二行",@"load2"]];
    //带有参数的方法,带几个参数就添加几个 :
    [_dataArray addObject:@[@"第一行",@"load1::"]];
    [_dataArray addObject:@[@"第二行",@"load2::"]];
    _mytableview = [[UITableView alloc] initWithFrame:CGRectMake(0, 64, 375, 500) style:UITableViewStylePlain];
    _mytableview.dataSource = self;
    _mytableview.delegate = self;
    [self.view addSubview:_mytableview];
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return _dataArray.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *cells = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cells];
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cells];
    }
    NSArray *arr = _dataArray[indexPath.row];
    cell.textLabel.text = arr[0];
    return cell;
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 50;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
        SEL funSel = NSSelectorFromString(self.dataArray[indexPath.row][1]);
        if (funSel) {
            //以下代码作用是 忽略警告
            #pragma clang diagnostic push
            #pragma clang diagnostic ignored "-Warc-performSelector-leaks"
            [self performSelector:funSel withObject:@"4" withObject:@"5"];
            #pragma clang diagnostic pop
        }
}

//不带参数的书写方法
-(void)load1{
    NSLog(@"1");
}
-(void)load2{
    NSLog(@"2");
}
//带有参数的方法 注意第二个参数的书写方法
-(void)load1:(NSString *)str :(NSString *)str2{
    NSLog(@"1%@%@",str,str2);
}
-(void)load2:(NSString *)str :(NSString *)str2{
    NSLog(@"2%@%@",str,str2);
}

以上即为动态加载实例的方法,使用起来非常方便,节省代码量

posted @ 2020-06-23 15:58  NSJELLY  阅读(318)  评论(0编辑  收藏  举报