帮助在自定义类中创建NSURLConnection
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嘿，我正在尝试使用Yahoo \的PlaceFinder对我正在制作的应用程序进行反向地理编码。问题是我需要使用NSURLConnection来调用我的数据库。因此，我决定制作一个使用用户的纬度和经度初始化的自定义类，并且仅存储包含用户所处状态的字符串变量。
更新以下代码现在可以正常工作了。
这是.h
#import <Foundation/Foundation.h>
#import \"CJSONDeserializer.h\"
@interface StateFinder : NSObject
{
NSString *userState;
NSURLConnection *connection;
}
-(id)initwithLatitude:(NSString *)latitude andLongitude:(NSString *)longitude;
@property (nonatomic, retain) NSString *userState;
@property (nonatomic, retain) NSURLConnection *connection;
@end
#import \"StateFinder.h\"
@implementation StateFinder
@synthesize userState;
@synthesize connection;
-(id)initwithLatitude:(NSString *)latitude andLongitude:(NSString *)longitude
{
if(self = [super init])
{
NSString *lat = latitude;
NSString *lon = longitude;
NSString *stateURLFinder = [NSString stringWithFormat:@\"http://where.yahooapis.com/geocode?q=%@,+%@&gflags=R&flags=J&appid=zqoGxo7k\", lat, lon];
//NSLog(stateURLFinder);
NSURL *stateURL = [NSURL URLWithString:stateURLFinder];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL: stateURL];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[request release];
}
return self;
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(@\"didReceiveResponse\");
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@\"didFinishLoading\");
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@\"didFailWithError\");
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
// Store incoming data into a string
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(jsonString);
// Yes, this is incomplete, but I was waiting for the method to fire before going
// any further. This will at least show me the JSON data being returned from yahoo
// in string format so I can output it to the console via NSLog
}
- (void)dealloc
{
[userState release];
[connection release];
[super dealloc];
}
@end
没有找到相关结果
已邀请:
4 个回复
岭取
导力疵谜
消息，否则连接将无法运行。不要那样做。关于JSON，您说的从服务器返回的字符串是JSON。您还期待其他吗？贸会
使用请求初始化连接后，它将自动运行。您还有其他问题。您对NSURLConnectionDelegate协议的实现是错误的。您需要将在“ 4”中接收的数据递增地添加到NSMutableData对象。您可以在“ connectionDidFinishLoading：\”中将其转换为JSON。 至于内存泄漏，请以或的方式释放连接。一定会收到一个，但不能同时收到。 您需要知道的一切都在这里 [编辑：添加了NSURLConnection代码示例]// Attach this to the touchUpInside event of a UIButton // Note that all objects will be autoreleased // Note that you can comment out any or all of the NSURLConnection delegate methods // and the request will execute - (IBAction)initiateRequest { NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL urlWithString:@\"http://www.google.com\"]]; NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self]; } - (void)connection:(NSURLConnection *)connection didRecieveData:(NSData *)date { NSLog(@\"connection:didReceiveData\"); } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSLog(@\"connection:didReceiveResponse:\"); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@\"connectionDidFinishLoading:\"); } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@\"connection:didFailWithError:\"); }恋卡
或这两种方法，,10ѭ和都开始被使用。谢谢大家的提示，建议和建议，希望这对以后的人有所帮助。