我正在开发一个新的 iPhone 应用程序,在这里我从本地解析了一个 'csv' 文件,它与我一起工作。当我尝试以编程方式从服务器下载“csv”文件时,它并没有为我锻炼。请你帮助我好吗?
从本地文件加载数据(工作正常)
- (void)viewDidLoad
{
[super viewDidLoad];
NSString * file = [[NSBundle bundleForClass:[self class]] pathForResource:@"sample" ofType:@"csv"];
NSStringEncoding encoding = 0;
NSString * csv = [NSString stringWithContentsOfFile:file usedEncoding:&encoding error:nil];
NSArray *fields = [csv CSVComponents];
NSLog(@"fields: %@", fields); //getting the result content
}
从服务器下载文件(失败)
-(void) connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"connectionDidFinishLoading"); //nothing showing here
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fullName = [NSString stringWithFormat:@"quotes.csv"];
NSString *fullFilePath = [NSString stringWithFormat:@"%@/%@",docDir,fullName];
[receivedData writeToFile:fullFilePath atomically:YES];
}
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSLog(@"data: %@", data); //nothing showing here
if (receivedData)
[receivedData appendData:data];
else
receivedData = [[NSMutableData alloc] initWithData:data];
}
- (void)loadDatafromURL
{
NSURL *url = [NSURL URLWithString:@"http://download.finance.yahoo.com/d/quotes.csv?s=^GSPC,^IXIC,^dji,^GSPC,^BVSP,^GSPTSE,^FTSE,^GDAXI,^FCHI,^STOXX50E,^AEX,^IBEX,^SSMI,^N225,^AXJO,^HSI,^NSEI&f=sl1d1t1c1ohgv&e=.csv"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection connectionWithRequest:request delegate:self];
}