Question

构建一个iOS应用程序，它从本地JSON数组中解析关键“成分”，然后在tableview中显示“成分”值。问题是每个成分键都有多个值。每个值都需要分成他们自己的tableview单元格，我无法弄清楚如何完成。我的知识非常有限，我只能将组合成分值显示在tableview单元格中。

如何分离值，以便成分中的每个值都有自己的tableview单元格？

仅有2个JSON数组中的数据示例：

{
  "locations": [


{"name" : "Drop Biscuits and Sausage Gravy", "ingredients" :     "Biscuits\n3 cups All-purpose Flour\n2 Tablespoons Baking Powder\n1/2 teaspoon Salt\n1-1/2 stick (3/4 Cup) Cold Butter, Cut Into Pieces\n1-1/4 cup Butermilk\n SAUSAGE GRAVY\n1 pound Breakfast Sausage, Hot Or Mild\n1/3 cup All-purpose Flour\n4 cups Whole Milk\n1/2 teaspoon Seasoned Salt\n2 teaspoons Black Pepper, More To Taste", "cookTime" : "PT30M"},

{"name" : "Hot Roast Beef Sandwiches", "ingredients" : "12 whole Dinner Rolls Or Small Sandwich Buns (I Used Whole Wheat)\n1 pound Thinly Shaved Roast Beef Or Ham (or Both!)\n1 pound Cheese (Provolone, Swiss, Mozzarella, Even Cheez Whiz!)\n1/4 cup Mayonnaise\n3 Tablespoons Grated Onion (or 1 Tbsp Dried Onion Flakes))\n1 Tablespoon Poppy Seeds\n1 Tablespoon Spicy Mustard\n1 Tablespoon Horseradish Mayo Or Straight Prepared Horseradish\n Dash Of Worcestershire, "cookTime" : "PT20M"}
  ]
}

这是tableview代码：

#import "FilterViewController.h"
#import "LocationsViewController.h"
#import "Location.h"
#import "JSONLoader.h"

@implementation FilterViewController {
NSArray *_locations;


}



- (void)viewDidLoad {
[super viewDidLoad];

// Create a new JSONLoader with a local file URL
JSONLoader *jsonLoader = [[JSONLoader alloc] init];
NSURL *url = [[NSBundle mainBundle] URLForResource:@"locations" withExtension:@"json"];

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    _locations = [jsonLoader locationsFromJSONFile:url];

    [self.tableView performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:YES];


});
}


- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
LocationsViewController *vc = segue.destinationViewController;
NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
vc.location = [_locations objectAtIndex:indexPath.row];
}

#pragma mark - Table View Controller Methods

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

Location *location = [_locations objectAtIndex:indexPath.row

cell.textLabel.text = location.ingredients;

cell.imageView.image = [UIImage imageNamed:@"ingredientsicon3232.png"];

return cell;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [_locations count];
}

@end

这是Location.h文件

#import <Foundation/Foundation.h>

@interface Location : NSObject

- (id)initWithJSONDictionary:(NSDictionary *)jsonDictionary;



@property (readonly) NSString *name;
@property (readonly) NSString *ingredients;
@property (readonly) NSString *cookTime;



@end

和Location.m文件

#import "Location.h"

@implementation Location

// Init the object with information from a dictionary
- (id)initWithJSONDictionary:(NSDictionary *)jsonDictionary {
    if(self = [self init]) {
        // Assign all properties with keyed values from the dictionary


        _name = [jsonDictionary objectForKey:@"name"];
        _ingredients = [jsonDictionary objectForKey:@"ingredients"];
        _cookTime = [jsonDictionary objectForKey:@"cookTime"];

    }

    return self;
}

@end

Answer 1

试试这个： -

 NSString *str_Calories_List = [[responseObject valueForKeyPath:@"location.name"] componentsJoinedByString:@", "];

Answer 2

我尝试过使用你的json数据

NSDictionary *setObject = @{
        @"name": @"Drop Biscuits and Sausage Gravy",
        @"ingredients": @"Biscuits\n3 cups All-purpose Flour\n2 Tablespoons Baking Powder\n1/2 teaspoon Salt\n1-1/2 stick (3/4 Cup) Cold Butter, Cut Into Pieces\n1-1/4 cup Butermilk\n SAUSAGE GRAVY\n1 pound Breakfast Sausage, Hot Or Mild\n1/3 cup All-purpose Flour\n4 cups Whole Milk\n1/2 teaspoon Seasoned Salt\n2 teaspoons Black Pepper, More To Taste",
        @"cookTime": @"PT30M"
        };


    NSArray *getArrayRespose =[NSArray arrayWithObjects:setObject,setObject, nil];
    NSMutableDictionary *dic = [[NSMutableDictionary alloc]init];
    [dic setObject:getArrayRespose forKey:@"locations"];
    NSLog(@"%@",dic);

    //I am tested to separate the string like below  

    NSArray *getObject = [dic objectForKey:@"locations"];
    NSDictionary *getFirstObject = [getObject objectAtIndex:0];
    NSString *name = [getFirstObject objectForKey:@"name"];
    NSString *ingred = [getFirstObject objectForKey:@"ingredients"];
    NSString *cook = [getFirstObject objectForKey:@"cookTime"];



- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return  1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
   NSArray *getObject = [dic objectForKey:@"locations"];
    return [getObject count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
   //  here you create the tableviewCell
    NSArray *getObject = [dic objectForKey:@"locations"];
    NSDictionary *getFirstObject = [getObject objectAtIndex:indexPath.row];
    NSString *name = [getFirstObject objectForKey:@"name"];
    NSString *ingred = [getFirstObject objectForKey:@"ingredients"];
    NSString *cook = [getFirstObject objectForKey:@"cookTime"];

    // can you use the separated string in your cell

    cell.titleLabel.text = name;
   }

1个JSON键，其中包含多个值，每个值都分为uitableview单元格

2 个答案: