我试图使用json结果填充UITableView
。我可以轻松从plist
数组加载它,甚至可以看到我的json数据。但是问题在于UITableView
永远无法看到json结果。请原谅我,因为这是我第一次使用Objective-C。
在我的.h文件中:
@interface TableViewViewController : UIViewController <UITableViewDataSource, UITableViewDelegate> {
NSArray *exercises;
NSMutableData *responseData;
}
在我的.m文件中
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return exercises.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//create a cell
UITableViewCell *cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:@"cell"];
// fill it with contnets
cell.textLabel.text = [exercises objectAtIndex:indexPath.row];
// return it
return cell;
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
responseData = [[NSMutableData data] retain];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://url_to_json"]];
[[NSURLConnection alloc] initWithRequest:request delegate:self ];
// load from plist
//NSString *myfile = [[NSBundle mainBundle] pathForResource:@"exercise" ofType:@"plist"];
//exercises = [[NSArray alloc] initWithContentsOfFile:myfile];
[super viewDidLoad];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[responseData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(@"Connection failed: %@", [error description]);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[connection release];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
[responseData release];
NSDictionary *dictionary = [responseString JSONValue];
NSArray *response = [dictionary objectForKey:@"response"];
exercises = [[NSArray alloc] initWithArray:response];
}