用JSON字典填充UITableView請求iOS

Question

我現在的問題是我在這段代碼上有數組。

需要用URL請求替換UItableView JSON響應對象並替換字典值。

有一種方法可以清理信息並重新裝載表以刷新新數據或可以方便實現的數據？

#import "RecipeTableViewController.h" 
#import "RecipeTableCell.h" 
#import "RecipeDetailViewController.h" 
#import "Recipe.h" 

@interface RecipeTableViewController() 

@end 

@implementation RecipeTableViewController 
{ 
    NSArray *recipes; 
    NSArray *searchResults; 

    NSMutableArray *myObject; 
    // A Dictionary Object 
    NSDictionary *dictionary; 

    NSString *name; 
    NSString *subject; 
    NSString *avatar; 
    NSString *rate; 
    NSString *bio; 
} 


- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    name = @"name"; 
    subject = @"subject"; 
    avatar = @"avatar"; 
    rate = @"rate"; 
    bio = @"bio"; 

    myObject = [[NSMutableArray alloc] init]; 
    NSData *jsonSource = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://latamig.com/data.json"]]; 

    id jsonObjects = [NSJSONSerialization JSONObjectWithData: jsonSource options:NSJSONReadingMutableContainers error:nil]; 


    for (NSDictionary *dataDict in jsonObjects) 
    { 
     NSString *name_data = [dataDict objectForKey:@"name"]; 
     NSString *subject_data = [dataDict objectForKey:@"subjects"]; 
     NSString *avatar_data = [dataDict objectForKey:@"avatar_s"]; 
     NSString *rate_data = [dataDict objectForKey:@"user_rate"]; 
     NSString *bio_data = [dataDict objectForKey:@"bio"]; 

     NSLog(@"Name: %@", name_data); 
     NSLog(@"Subject: %@",subject_data); 
     NSLog(@"Avatar: %@", avatar_data); 
     NSLog(@"Rate: %@",rate_data); 
     NSLog(@"Bio: %@",bio_data); 

     dictionary = [NSDictionary dictionaryWithObjectsAndKeys: 
         name_data,name, 
         subject_data,subject, 
         avatar_data,avatar, 
         rate_data,rate, 
         bio_data, bio, nil]; 

     [myObject addObject:dictionary]; 
    } 



    // API CALL MAKE END 

    /* Initialize the recipes array 
    Recipe *recipe1 = [Recipe new]; 
    recipe1.name = @"Andruw"; 
    recipe1.prepTime = @"$255/h"; 
    recipe1.bio = @"I'm a Web developer working for 3 years as a Programmer on Facebook"; 
    recipe1.image = @"avatar1.jpg"; 


    recipes = [NSArray arrayWithObjects:recipe1, nil]; 

    */ 



} 


- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{ 
    if (tableView == self.searchDisplayController.searchResultsTableView) { 
     return [searchResults count]; 

    } else { 
     return [recipes count]; 
    } 
} 

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    return 71; 
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *CellIdentifier = @"CustomTableCell"; 
    RecipeTableCell *cell = (RecipeTableCell *)[self.tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 

    // Configure the cell... 
    if (cell == nil) { 
     cell = [[RecipeTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; 
    } 

    // Display recipe in the table cell 
    Recipe *recipe = nil; 
    if (tableView == self.searchDisplayController.searchResultsTableView) { 
     recipe = [searchResults objectAtIndex:indexPath.row]; 
    } else { 
     recipe = [recipes objectAtIndex:indexPath.row]; 
    } 

    cell.nameLabel.text = recipe.name; 
    cell.bioLabel.text = recipe.bio; 
    cell.thumbnailImageView.image = [UIImage imageNamed:recipe.image]; 
    cell.thumbnailImageView.clipsToBounds = YES; 
    cell.thumbnailImageView.layer.cornerRadius = cell.thumbnailImageView.frame.size.width /2; 
    cell.prepTimeLabel.layer.cornerRadius = 5; 
    cell.prepTimeLabel.text = recipe.prepTime; 

    return cell; 
} 

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { 
    if ([segue.identifier isEqualToString:@"showRecipeDetail"]) { 
     NSIndexPath *indexPath = nil; 
     Recipe *recipe = nil; 

     if (self.searchDisplayController.active) { 
      indexPath = [self.searchDisplayController.searchResultsTableView indexPathForSelectedRow]; 
      recipe = [searchResults objectAtIndex:indexPath.row]; 
     } else { 
      indexPath = [self.tableView indexPathForSelectedRow]; 
      recipe = [recipes objectAtIndex:indexPath.row]; 
     } 

     RecipeDetailViewController *destViewController = segue.destinationViewController; 
     destViewController.recipe = recipe; 
    } 
} 

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope 
{ 
    NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"name contains[c] %@", searchText]; 
    searchResults = [recipes filteredArrayUsingPredicate:resultPredicate]; 
} 

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString 
{ 
    [self filterContentForSearchText:searchString 
           scope:[[self.searchDisplayController.searchBar scopeButtonTitles] 
             objectAtIndex:[self.searchDisplayController.searchBar 
                selectedScopeButtonIndex]]]; 

    return YES; 
} 


@end 

Answer 1

目前還不清楚你問什麼，但這些代碼片段可以幫助：

@property (nonatomic, strong) NSData *rawFromCloud; 

#define yourUrl [NSURL URLWithString:@"http://blah.com/json/stubs"] 

-(void)fromCloud:(void(^)(void))after 
    { 
    dispatch_async(dispatch_get_main_queue(), 
     ^{ 
     self.rawStubsFromCloud = [NSData dataWithContentsOfURL:yourUrl]; 
     after(); 
     }); 
    } 

NSError* error; 
NSDictionary* jdic = [NSJSONSerialization 
    JSONObjectWithData:self.rawFromCloud 
    options:kNilOptions 
    error:&error]; 

//CRITICAL -- do this, to see what is going on: 
NSLog(@"%@", jdic); //to see the fields available 

NSArray* stubs = [jdic objectForKey:@"stubs"]; 

就是這樣 - 你有一個數組！

for (NSDictionary *stub in stubs) 
    { 
    NSString *nn = [stub objectForKey:@"userName"]; 
    NSLog("one userName %@", nn); 
    } 

（腳註，你也有「新」語法存根[@「username」的]但是「objectForKey」語法是初學者容易，我想。乾杯，希望它幫助。）