ios - 不同 NSURLConnection 的单例

Question

<分区>

Answer 1

您可以做的是拥有一个自定义连接类来表示一个连接、它的数据以及可选的一些关于该连接的信息。我用这个:

@interface MyConnection : NSObject

@property NSURLConnection *connection;
@property id info;
@property NSMutableData *data;

@end

然后只需将连接放入一个数组中，并将实际的 NSURLConnection 对象相互比较，以找出哪个连接接收到数据/失败等。

创建连接:

 NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:someRequest delegate:self];

    if (connection){
        MyConnection *con = [[MyConnection alloc] init];
        con.connection = connection;
        con.data = [NSMutableData data];
        [self.arrayWithConnections addObject:con];
    }

方法:

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    MyConnection *con = [self getConnection:connection]
    [con.data appendData:data];
}

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    MyConnection *con = [self getConnection:connection];
    [con.data setLength:0]; 
}

-(MyConnection *)getConnection:(NSURLConnection *)con
{
    for (MyConnection *myCon in self.arrayWithConnections)
        if ([con isEqual: myCon.connection])
            return myCon;
    return nil;
}