Question

大家。现在我正在尝试创建一个UITableView，其中按字母排序的联系人姓名和个人资料图片。就像这张图片一样： Contact list 提供此图像的网站向我展示了如何制作这样的内容，但我遇到了问题，因为在我的应用程序中我们没有静态图像，但使用MySQL数据库来提供保存的联系人。我能够通过Web服务获取所需的数据并将其放在名为dataDict的NSDictionary中。在NSLog中，它显示如下：

animal={(id="1",name="BEAR",images="bear321.jpg"),(id="2",name="Dog",images="puppy.jpg"),(id="3",name="GOOSE",images="null"),...so on}

由于我不知道如何解析我所拥有的字典，所以现在我还在使用这段代码： -

(void)viewDidLoad
{
    [super viewDidLoad];

    animals = @{@"B" : @[@"Bear", @"Black Swan", @"Buffalo"],
                @"C" : @[@"Camel", @"Cockatoo"],
                @"D" : @[@"Dog", @"Donkey"],
                @"E" : @[@"Emu"],
                @"G" : @[@"Giraffe", @"Greater Rhea"],
                @"H" : @[@"Hippopotamus", @"Horse"],
                @"K" : @[@"Koala"],
                @"L" : @[@"Lion", @"Llama"],
                @"M" : @[@"Manatus", @"Meerkat"],
                @"P" : @[@"Panda", @"Peacock", @"Pig", @"Platypus", @"Polar Bear"],
                @"R" : @[@"Rhinoceros"],
                @"S" : @[@"Seagull"],
                @"T" : @[@"Tasmania Devil"],
                @"W" : @[@"Whale", @"Whale Shark", @"Wombat"]};

    animalSectionTitles = [[animals allKeys] sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
}

- (NSString *)getImageFilename:(NSString *)animal
{
    NSString *imageFilename = [[animal lowercaseString] stringByReplacingOccurrencesOfString:@" " withString:@"_"];
    imageFilename = [imageFilename stringByAppendingString:@".jpg"];

    return imageFilename;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    NSString *sectionTitle = [animalSectionTitles objectAtIndex:section];
    NSArray *sectionAnimals = [animals objectForKey:sectionTitle];
    return [sectionAnimals count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    // Configure the cell...
    NSString *sectionTitle = [animalSectionTitles objectAtIndex:indexPath.section];
    NSArray *sectionAnimals = [animals objectForKey:sectionTitle];
    NSString *animal = [sectionAnimals objectAtIndex:indexPath.row];
    cell.textLabel.text = animal;
    cell.imageView.image = [UIImage imageNamed:[self getImageFilename:animal]];

    return cell;
}

完全相同like this site所以请帮我解决我的问题，告诉我我需要修改的内容，这样我就可以根据我的动态字典添加图片名称和图片，而不是像上面那样硬编码。非常感谢提前^^

Answer 1

以下是您尝试做的一个示例。

@interface ViewController ()
  @property (nonatomic, strong) NSMutableArray *animals;
  @property (nonatomic, strong) NSArray *sections;
@end

@implementation ViewController

static NSString *const CellIdentifier = @"CellIdentifier";
- (void)viewDidLoad {
  [super viewDidLoad];
  [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:CellIdentifier];
  NSArray *allAnimals = @[@{@"name": @"Bear"}, @{@"name": @"Black Swan"}, @{@"name": @"Buffalo"}, @{@"name": @"Camel"}, @{@"name": @"Cockatoo"}, @{@"name": @"Dog"}, @{@"name": @"Donkey"}, @{@"name": @"Emu"},
    @{@"name": @"Giraffe"},@{@"name":  @"Greater Rhea"}, @{@"name": @"Hippopotamus"}, @{@"name": @"Horse"}, @{@"name": @"Koala"}, @{@"name": @"Lion"}, @{@"name": @"Llama"}, @{@"name": @"Manatus"}, @{@"name": @"Meerkat"}, @{@"name": @"Panda"}, @{@"name": @"Peacock"}, @{@"name": @"Pig"}, @{@"name": @"Platypus"}, @{@"name": @"Polar Bear"}, @{@"name": @"Rhinoceros"}, @{@"name": @"Seagull"}, @{@"name": @"Tasmania Devil"}, @{@"name": @"Whale"}, @{@"name": @"Whale Shark"}, @{@"name": @"Wombat"}];


  UILocalizedIndexedCollation *collation = [UILocalizedIndexedCollation currentCollation];


  NSArray *sectionIndexTitles = [collation sectionIndexTitles];

  _animals = [NSMutableArray array];

  for(int i = 0 ; i < sectionIndexTitles.count; i++){
    [self.animals addObject:[NSMutableArray array]];
  }

  for(NSDictionary *anAnimal in allAnimals){

    NSString *name = anAnimal[@"name"];

    NSUInteger section = [collation sectionForObject:name collationStringSelector:@selector(capitalizedString)];

    NSMutableArray *array = [self.animals objectAtIndex:section];

    [array addObject:anAnimal];


  }

}

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

  UILocalizedIndexedCollation *collation = [UILocalizedIndexedCollation currentCollation];
  if([self.animals[section] count] > 0 ) return [collation sectionIndexTitles][section];
  return 0;

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
  UILocalizedIndexedCollation *collation = [UILocalizedIndexedCollation currentCollation];
  return [[collation sectionIndexTitles] count];

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
  NSArray *animalsInSection = [self.animals objectAtIndex:section];
  return animalsInSection.count;
}


- (NSArray*)sectionIndexTitlesForTableView:(UITableView *)tableView{
  UILocalizedIndexedCollation *collation =  [UILocalizedIndexedCollation currentCollation];
  return [collation sectionIndexTitles];
}


- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
  UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];


  NSArray  *animalsInSection = [self.animals objectAtIndex:indexPath.section];
  cell.textLabel.text = animalsInSection[indexPath.row][@"name"];
  return cell;
}

  @end

我希望你正在尝试这样做。

使用MySQL中的已排序名称和图像创建联系人列表

1 个答案: