UITableViewControllerから複数のビューコントローラへのアクセス方法
https://stackoverflow.com//questions/20019066
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21-12-2019 - |
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私は新しいiOS開発者であり、私がレシピのプロジェクトを作成するとき、私は各セルから別のビューコントローラへ行く必要があります。各ビューコントローラには画像の配列があり、UIPageViewControllerとして表示されます。
これは最初のビューコントローラのマイ配列です（RecipeViewController）
- (void)viewDidLoad
{
[super viewDidLoad];
// Initialize table data
Recipe *recipe1 = [Recipe new];
recipe1.name = @"Egg Benedict";
recipe1.prepTime = @"30 min";
recipe1.imageFile = @"egg_benedict.jpg";
recipe1.ingredients = [NSArray arrayWithObjects:@"2 fresh English muffins", @"4 eggs", @"4 rashers of back bacon", @"2 egg yolks", @"1 tbsp of lemon juice", @"125 g of butter", @"salt and pepper", nil];
Recipe *recipe2 = [Recipe new];
recipe2.name = @"Mushroom Risotto";
recipe2.prepTime = @"30 min";
recipe2.imageFile = @"mushroom_risotto.jpg";
recipe2.ingredients = [NSArray arrayWithObjects:@"1 tbsp dried porcini mushrooms", @"2 tbsp olive oil", @"1 onion, chopped", @"2 garlic cloves", @"350g/12oz arborio rice", @"1.2 litres/2 pints hot vegetable stock", @"salt and pepper", @"25g/1oz butter", nil];
Recipe *recipe3 = [Recipe new];
recipe3.name = @"Full Breakfast";
recipe3.prepTime = @"20 min";
recipe3.imageFile = @"full_breakfast.jpg";
recipe3.ingredients = [NSArray arrayWithObjects:@"2 sausages", @"100 grams of mushrooms", @"2 rashers of bacon", @"2 eggs", @"150 grams of baked beans", @"Vegetable oil", nil];
Recipe *recipe4 = [Recipe new];
recipe4.name = @"Hamburger";
recipe4.prepTime = @"30 min";
recipe4.imageFile = @"hamburger.jpg";
recipe4.ingredients = [NSArray arrayWithObjects:@"400g of ground beef", @"1/4 onion (minced)", @"1 tbsp butter", @"hamburger bun", @"1 teaspoon dry mustard", @"Salt and pepper", nil];
Recipe *recipe5 = [Recipe new];
recipe5.name = @"Ham and Egg Sandwich";
recipe5.prepTime = @"10 min";
recipe5.imageFile = @"ham_and_egg_sandwich.jpg";
recipe5.ingredients = [NSArray arrayWithObjects:@"1 unsliced loaf (1 pound) French bread", @"4 tablespoons butter", @"2 tablespoons mayonnaise", @"8 thin slices deli ham", @"1 large tomato, sliced", @"1 small onion", @"8 eggs", @"8 slices cheddar cheese", nil];
Recipe *recipe6 = [Recipe new];
recipe6.name = @"Creme Brelee";
recipe6.prepTime = @"1 hour";
recipe6.imageFile = @"creme_brelee.jpg";
recipe6.ingredients = [NSArray arrayWithObjects:@"1 quart heavy cream", @"1 vanilla bean, split and scraped", @"1 cup vanilla sugar", @"6 large egg yolks", @"2 quarts hot water", nil];
Recipe *recipe7 = [Recipe new];
recipe7.name = @"White Chocolate Donut";
recipe7.prepTime = @"45 min";
recipe7.imageFile = @"white_chocolate_donut.jpg";
recipe7.ingredients = [NSArray arrayWithObjects:@"3 1/4 cups flour", @"2 teaspoons baking powder", @"1/4 teaspoon salt", @"2 beaten eggs", @"2/3 cup sugar", @"2 ounces melted white chocolate", @"1/2 cup milk", nil];
Recipe *recipe8 = [Recipe new];
recipe8.name = @"White Chocolate Mocha";
recipe8.prepTime = @"5 min";
recipe8.imageFile = @"starbucks_coffee.jpg";
recipe8.ingredients = [NSArray arrayWithObjects:@"2/3 cup whole milk", @"6 tablespoons white chocolate chips", @"coffee", @"whipped cream", nil];
Recipe *recipe9 = [Recipe new];
recipe9.name = @"Vegetable Curry";
recipe9.prepTime = @"30 min";
recipe9.imageFile = @"vegetable_curry.jpg";
recipe9.ingredients = [NSArray arrayWithObjects:@"1 tablespoon olive oil", @"1 onion, chopped", @"2 cloves garlic", @"2 1/2 tablespoons curry powder", @"2 quarts hot water", nil];
Recipe *recipe10 = [Recipe new];
recipe10.name = @"Instant Noodle with Egg";
recipe10.prepTime = @"8 min";
recipe10.imageFile = @"instant_noodle_with_egg.jpg";
recipe10.ingredients = [NSArray arrayWithObjects:@"1 pack of Instant Noodle", @"2 eggs", nil];
Recipe *recipe11 = [Recipe new];
recipe11.name = @"Noodle with BBQ Pork";
recipe11.prepTime = @"20 min";
recipe11.imageFile = @"noodle_with_bbq_pork.jpg";
recipe11.ingredients = [NSArray arrayWithObjects:@"1 pack of Instant Noodle", @"BBQ pork", @"Salt and Pepper", nil];
Recipe *recipe12 = [Recipe new];
recipe12.name = @"Japanese Noodle with Pork";
recipe12.prepTime = @"20 min";
recipe12.imageFile = @"japanese_noodle_with_pork.jpg";
recipe12.ingredients = [NSArray arrayWithObjects:@"1 pack of Japanese Noodle", @"2 green onions", @"2 garlic cloves, minced", @"4 boneless pork loin chops", nil];
Recipe *recipe13 = [Recipe new];
recipe13.name = @"Green Tea";
recipe13.prepTime = @"5 min";
recipe13.imageFile = @"green_tea.jpg";
recipe13.ingredients = [NSArray arrayWithObjects:@"Green tea", nil];
Recipe *recipe14 = [Recipe new];
recipe14.name = @"Thai Shrimp Cake";
recipe14.prepTime = @"1.5 hours";
recipe14.imageFile = @"thai_shrimp_cake.jpg";
recipe14.ingredients = [NSArray arrayWithObjects:@"8 oz (250g) peeled and deveined raw shrimp", @"2 tablespoons red curry paste", @"1 large egg", @"2 teaspoon fish sauce", @"1 tablespoon sugar", @"2 tablespoons coconut milk", @"2 tablespoons roughly chopped Thai basil leaves", nil];
Recipe *recipe15 = [Recipe new];
recipe15.name = @"Angry Birds Cake";
recipe15.prepTime = @"4 hours";
recipe15.imageFile = @"angry_birds_cake.jpg";
recipe15.ingredients = [NSArray arrayWithObjects:@"12 tablespoons (1 1/2 sticks) unsalted butter", @"2 1/2 cups all-purpose flour", @"1 tablespoon baking powder", @"1 teaspoon salt", @"1 3/4 cups sugar", @"2 large eggs, plus 3 large egg yolks", @"1 cup of milk", nil];
Recipe *recipe16 = [Recipe new];
recipe16.name = @"Ham and Cheese Panini";
recipe16.prepTime = @"10 min";
recipe16.imageFile = @"ham_and_cheese_panini.jpg";
recipe16.ingredients = [NSArray arrayWithObjects:@"2 tablespoons unsalted butter", @"4 cups thinly sliced shallots", @"2 teaspoons fresh thyme", @"1/4 cup grainy Dijon mustard", @"8 slices rustic white bread", @"8 slices Gruyere cheese", @"8 ounces sliced cooked ham", nil];
recipes = [NSArray arrayWithObjects:recipe1, recipe2, recipe3, recipe4, recipe5, recipe6, recipe7, recipe8, recipe9, recipe10, recipe11, recipe12, recipe13, recipe14, recipe15, recipe16, nil];
}
SO「Egg BeneDict」を押すと、画像配列を使ってビューコントローラに移動する必要があります。 そして、コードを次の
として使用します。- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([segue.identifier isEqualToString:@"themeDetails"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
ThemeDetailViewController *destViewController = segue.destinationViewController;
destViewController.theme = [titleLabel objectAtIndex:indexPath.row];
}
この正しいか変更する必要がある場合 My（ `reciepeviewcontroller.h）は次のとおりです
@property (nonatomic, strong) ReciepeDetailViewController *reciepeDetailController;
私を助けてください。私はGoogleとYouTubeで何度も検索しますが、何も得られませんでした
解決
動的テーブルビューを作成する必要があります。
あなたのコードの以下の改善を提案するでしょう：
最初に、私はあなたのレシピを含むJSONファイルを作成します。これはアプリケーションバンドル内のリソースファイルになります。
次の内容でファイル "recipes.json"を作成します。
[
{
"preparation_time": 30,
"image_url": "egg_benedict.jpg",
"name": "Egg Benedict",
"ingredients": [
"2 fresh English muffins",
"4 eggs",
"4 rashers of back bacon",
"2 egg yolks",
"1 tbsp of lemon juice",
"125 g of butter",
"salt and pepper"
]
},
{
"preparation_time": 30,
"image_url": "mushroom_risotto.jpg",
"name": "Mushroom Risotto",
"ingredients": [
"1 tbsp dried porcini mushrooms",
"2 tbsp olive oil",
"1 onion, chopped",
"2 garlic cloves",
"350g/12oz arborio rice",
"1.2 litres/2 pints hot vegetable stock",
"salt and pepper",
"25g/1oz butter"
]
}
]
（注：コードサンプルからJSONファイルに2つのレシピを入れるだけ）
それでは、viewDidLoadのView ControllerをRecipesにロードし、辞書の配列であるJSON表現を作成します。
NSBundle* mainBundle = [NSBundle mainBundle];
NSURL* recipesDataURL = [mainBundle URLForResource:@"recipes" withExtension:@"json"];
if (recipesDataURL) {
NSData* data = [NSData dataWithContentsOfURL: recipesDataURL];
if (data) {
NSError* error;
NSArray* recipes = [NSJSONSerialization JSONObjectWithData:data
options:0
error:&error];
if (recipes == nil) {
// error: couldn't parse the JSON
return;
}
self.recipes = recipes;
}
else {
// error: couldn't load the data with the given URL
return;
}
}
else {
// error: couldn't locate the resource in the bundle
return;
}
self.recipesは、レシピの配列であるビューコントローラのプロパティです（NSDictionary）。
レシピ自体はNSDictionaryです。必要に応じて、専用クラスRecipeを作成してレシピオブジェクトを初期化できます（例えば、「パラメータ」を含むその辞書を使用してinitWithParameters:）。ただし、レシピオブジェクトとしてNSDictionaryを使用するのに完全に十分な場合があります。
動的テーブルビューを使用する場合は、いくつかの委任メソッドを実装する必要があります。 IOS
基本的に、およびジャンプ開始として、セルを設定するときに、TableViewDataSource Delegateはの数と Recipeオブジェクトのプロパティを取得するために配列self.recipesにアクセスします。 。例えば：
uitaicleviewdatasourceデリゲート：
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.recipes count];
}
- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
UITableViewCell* cell = [tableView dequeueReusableCellWithIdentifier:@"MyIdentifier"];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:@"MyIdentifier"];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
NSDictionary* recipe = [self.recipes objectAtIndex:indexPath.row];
cell.textLabel.text = recipe[@"name];
return cell;
}
編集：
詳細ビューを表示することができます。これは、他の回答で表示されているようにレシピのすべての詳細を表示できます。私は次のように提案するでしょう：
詳細ビューコントローラには、PublicプロパティrecipeがNSDictionary：
@property (nonatomic, strong) NSDictionary* recipe;
ストーリーボードを活用しない場合は、詳細ビューコントローラを次のように表示できます。
あなたの tableviewcontroller.m ：
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSDictionary* recipe = [self.recipes objectAtIndex:[indexPath row]];
ShowRecipeViewController* viewController = (ShowRecipeViewController*)[[ShowRecipeViewController alloc] initWithNibName:@"ShowRecipeViewController" bundle:nil];
viewController.recipe = recipe;
[[self navigationController] pushViewController: viewController animated:YES];
}
私はストーリーボードを使うことをお勧めします。この場合、詳細ビューコントローラはrecipeで設定されたプロパティprepareForSegue:sender:を取得します。
他のヒント
オプションが良い場合は、単一のViewControllerに移動して、それぞれのデータをそれぞれのデータにします。しかし、それぞれのデータに対して複数のViewControllerに行きたいのと同じように、以下のようにしてください...
Recipeインターフェイスにプロパティを追加してそれを合成する
@property (nonatomic, retain) UIViewController *MyViewController;
今あなたのviewDidLoadメソッドには以下の
-(void)viewDidLoad
{
[super viewDidLoad];
ObjectHolderArray=[[NSMutableArray alloc] init]; // it's mutable array for holding all the object of recipe which we are going to create
Recipe *recipe1 = [Recipe new];
recipe1.name = @"Egg Benedict";
recipe1.prepTime = @"30 min";
recipe1.imageFile = @"egg_benedict.jpg";
recipe1.ingredients = [NSArray arrayWithObjects:@"2 fresh English muffins", @"4 eggs", @"4 rashers of back bacon", @"2 egg yolks", @"1 tbsp of lemon juice", @"125 g of butter", @"salt and pepper", nil];
recipe1.MyViewController=[[eggBenedictViewController alloc] init]; //set your respective viewController
[ObjectHolderArray addObject:recipe1]; // add your object to your array
Recipe *recipe2 = [Recipe new];
recipe2.name = @"Mushroom Risotto";
recipe2.prepTime = @"30 min";
recipe2.imageFile = @"mushroom_risotto.jpg";
recipe2.ingredients = [NSArray arrayWithObjects:@"1 tbsp dried porcini mushrooms", @"2 tbsp olive oil", @"1 onion, chopped", @"2 garlic cloves", @"350g/12oz arborio rice", @"1.2 litres/2 pints hot vegetable stock", @"salt and pepper", @"25g/1oz butter", nil];\
recipe1.MyViewController=[[mushroomRisottoViewController alloc] init]; //set your respective viewController
[ObjectHolderArray addObject:recipe2]; // add your object to your array
// and so on
}
In DidSelectrowatIndexPath以下の
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
Recipe *recipeObject=[ObjectHolderArray objectAtIndex:[indexpath row]]; //get the selected recipe object
UIViewController *myController=(UIViewController *)[recipeObject MyViewController];
// Now you have your respective viewcotroller and also all the required data for going to next viewController
// then what you are waiting for? simply push your viewcontroller
}
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