将 UITableView 分成 Objective-C in Xcode11 的部分

Question

我是 iOS Xcode 11 和 Objective-C 开发的新手，所以请多多包涵。

我的目标是创建两个页面，其中第一页有一个按钮，按下后会转到第二页。在第二页中，我有一个包含一些数据的简单列表。

我试图将此 TableView 分成几个部分。到目前为止，我已经创建了一个按钮，并且可以 "jump" 从一页到另一页 Segue。但是在用数据归档列表时遇到了麻烦。我正试图制作这个页面：

但是我得到的是没有任何数据的列表：

这是我的 main.storyboard:

对于第二个视图，我创建了一个新的 class SecondControllerView.m 并将此 class 附加到第二页

  //SecondControllerView.m  
#import "SecondViewController.h"

@interface SecondViewController (){
NSMutableArray *numArray;
NSMutableArray *numArray1;
NSMutableArray *numArray2;
NSMutableArray *numArray3;
NSMutableArray *numArray4;
NSMutableArray *numArray5;
NSMutableArray *numArray6;
NSMutableArray *numArray7;

NSMutableArray * sectionArray;
}
@end

@implementation SecondViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    numArray = [NSMutableArray arrayWithObjects:@"unit 1",@"unit 2",@"unit 3",@"unit 4",nil];
    numArray1 = [NSMutableArray arrayWithObjects:@"unit 1",@"unit 2",@"unit 3",@"unit 4",nil];
    numArray2 = [NSMutableArray arrayWithObjects:@"unit 1",@"unit 2",@"unit 3",@"unit 4",nil];
    numArray3 = [NSMutableArray arrayWithObjects:@"unit 1",@"unit 2",@"unit 3",@"unit 4",nil];
    numArray4 = [NSMutableArray arrayWithObjects:@"unit 1",@"unit 2",@"unit 3",@"unit 4",nil];
    numArray5 = [NSMutableArray arrayWithObjects:@"unit 1",@"unit 2",@"unit 3",@"unit 4",nil];
    numArray6 = [NSMutableArray arrayWithObjects:@"unit 1",@"unit 2",@"unit 3",@"unit 4",nil];
    numArray7 = [NSMutableArray arrayWithObjects:@"unit 1",@"unit 2",@"unit 3",@"unit 4",nil];

    sectionArray = [NSMutableArray arrayWithObjects:@"tour 1",@"tour 2",@"tour 3",@"tour 4",@"tour 5",@"tour 6",@"tour 7",@"tour 8",nil];
    NSLog(@"Hello world");
}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return sectionArray.count;
}

-(NSString * )tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section{
    return sectionArray[section];
}

-(NSInteger)tableView:(nonnull UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    int count = 0;
    if(section == 0){
        return numArray.count;
    }else if (section == 1){
        return numArray1.count;
    }else if (section == 2){
        return numArray2.count;
    }else if(section == 3){
        return numArray3.count;
    }else if(section == 4){
        return numArray4.count;
    }else if(section == 5){
        return numArray5.count;
    }else if(section == 6){
        return numArray6.count;
    }else if(section == 7){
        return numArray7.count;
    }
    return count;
}

-(nonnull UITableViewCell *)tableView:(nonnull UITableView *)tableView cellForRowAtIndexPath:(nonnull NSIndexPath *)indexPath{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    if(indexPath.section == 0){
        cell.textLabel.text = numArray[indexPath.row];
    }else if(indexPath.section == 1){
        cell.textLabel.text = numArray1[indexPath.row];
    }else if(indexPath.section == 2){
        cell.textLabel.text = numArray2[indexPath.row];
    }else if(indexPath.section == 3){
        cell.textLabel.text = numArray3[indexPath.row];
    }else if(indexPath.section == 4){
        cell.textLabel.text = numArray4[indexPath.row];
    }else if(indexPath.section == 5){
        cell.textLabel.text = numArray5[indexPath.row];
    }else if(indexPath.section == 6){
        cell.textLabel.text = numArray6[indexPath.row];
    }else if(indexPath.section == 7){
        cell.textLabel.text = numArray7[indexPath.row];
    }
    return cell;
}

@end

这里有什么问题吗？

Answer 1

首先，使 SecondViewController 成为 table 视图的委托和数据源 https://guides.codepath.com/ios/Table-View-Guide

其次，在viewDidLoad

的最后做[self.tableView reloadData]

将 UITableView 分成 Objective-C in Xcode11 的部分

Divide UITableView into sections with Objective-C in Xcode11

ios

objective-c

uitableview

xcode11