嵌套NSArray的UITableView中的不同节头

Question

我正在尝试学习如何编写UITableView，并且对该部分的编程存在一些问题。

我已经声明了3个带字符串的数组和1个带有3个数组的数组。

firstSection = [NSArray arrayWithObjects:@"Red", @"Blue", nil];
secondSection = [NSArray arrayWithObjects:@"Orange", @"Green", @"Purple", nil];
thirdSection = [NSArray arrayWithObject:@"Yellow"];

array = [[NSMutableArray alloc] initWithObjects:firstSection, secondSection, thirdSection, nil];

显示标题

-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section{

NSString * title;
title = [NSString stringWithFormat:@"%@" , [array objectAtIndex:section]];

return title;
}

将数组本身显示为标题

因此是否可以使用诸如firstSection和secondSection等数组的名称来实际显示部分的名称？

Answer 1

在您的情况下，最好将数组存储在NSDictionary中。例如，如果您声明并合成名为NSDictionary的{​​{1}}变量和名为tableContents的{​​{1}}变量，则可以执行以下操作：

NSArray

然后在表视图中使用控制器方法：

titleOfSections

然后使用 - (void)viewDidLoad { [super viewDidLoad]; //These will automatically be released. You won't be needing them anymore (You'll be accessing your data through the NSDictionary variable) NSArray *firstSection = [NSArray arrayWithObjects:@"Red", @"Blue", nil]; NSArray *secondSection = [NSArray arrayWithObjects:@"Orange", @"Green", @"Purple", nil]; NSArray *thirdSection = [NSArray arrayWithObject:@"Yellow"]; //These are the names that will appear in the section header self.titleOfSections = [NSArray arrayWithObjects:@"Name of your first section",@"Name of your second section",@"Name of your third section", nil]; NSDictionary *temporaryDictionary = [[NSDictionary alloc]initWithObjectsAndKeys:firstSection,@"0",secondSection,@"1",thirdSection,@"2",nil]; self.tableContents = temporaryDictionary; [temporaryDictionary release]; } 方法访问每个数组的内容：

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return [self.titleOfSections count];
}
- (NSInteger)tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section {
    return [[self.tableContents objectForKey:[NSString stringWithFormat:@"%d",section]] count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    //Setting the name of your section
    return [self.titleOfSections objectAtIndex:section]; 
}

Answer 2

你可以这样做吗

  NSArray   *SectionArray = [[NSArray alloc]initwithArray:[array objectAtIndex:section]];

  NSString * title;

  title = [NSString stringWithFormat:@"%@" , [SectionArray objectAtIndex:section]];

   return title;