使用Objective-C iOS以编程方式创建TableVIew [英] Creating A TableVIew Programmatically With Objective-C iOS

问题描述

我是开发iOS应用程序和Objective C本身的新手，所以我有一个非常简单的问题。

I'm new to developing iOS applications and Objective C itself, so I have a probably very simple question.

目前我有以下方法调用工具栏按钮单击。该方法用于在帧变量 fr 中创建表视图。

Currently I have the following method that is called from a ToolBar Button click. The method is designed to create a table view in the frame variable fr.

- (IBAction)addGolfer:(id)sender {
    CGRect fr = CGRectMake(101, 45, 100, 416);

    UITableView *tabrleView = [[UITableView alloc]
      initWithFrame:fr
      style:UITableViewStylePlain];

    tabrleView.autoresizingMask =
      UIViewAutoresizingFlexibleHeight |
      UIViewAutoresizingFlexibleWidth;
    tabrleView.delegate = self;
    tabrleView.dataSource = self;
    [tabrleView reloadData];

    self.view = tableView;
}

调用此方法的结果不是我所期望的。表视图不是在框架fr中创建表视图，而是填充整个屏幕。

The result of calling this method is not what I expect. Instead of creating the Table View in the frame "fr", the table view fills the entire screen.

再次，我是全新的，并且会感谢任何答案和任何建议。谢谢！

Again I'm totally new and would a appreciate any answers and any suggestions. Thanks!

推荐答案

当您设置 dataSource 和委托 UITableView 的属性，这意味着，你必须为 dataSource ：

When you set dataSource and delegate properties for your UITableView, it means, you have to write at least this methods for dataSource:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;

如果你不这样做，那就会崩溃。总结你会得到这个（这段代码可能包含语法或逻辑错误 - 我在记事本中写了它）：

If you wouldn't do this, it will be crash. Summary you'll get this (this code may contain syntax or logic errors - I wrote it in notepad):

@interface YourViewController : UIViewController <UITableViewDataSource, UITableViewDelegate> {
    UITableView *firstTableView;
    UITableView *secondTableView;
}

@end

//

@implementation YourViewController

#pragma mark - Objects Processing

- (void)addGolfer:(UIBarButtonItem *)sender {
    if (secondTableView) {
        [secondTableView removeFromSuperView];
        secondTableView = nil;
    }

    secondTableView = [[UITableView alloc] initWithFrame:CGRectMake(101, 45, 100, 416)];
    secondTableView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    secondTableView.delegate = self;
    tabrleView.dataSource = self;

    [self.view addSubview:secondTableView];
}

#pragma mark - TableView DataSource Implementation

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    if (tableView == firstTableView) { // your tableView you had before
        return 20; // or other number, that you want
    }
    else if (tableView == secondTableView) {
        return 15; // or other number, that you want
    }
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *cellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil)
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];

    cell.backgroundView = [[UIView alloc] init];
    [cell.backgroundView setBackgroundColor:[UIColor clearColor]];
    [[[cell contentView] subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];

    if (tableView == firstTableView) { // your tableView you had before
        // ...
    }
    else if (tableView == secondTableView) {
        cell.titleLabel.text = [NSString stringWithFormat:@"Cell %d", indexPath.row + 1];
    }

    return cell;
}

@end

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