NSURLConnection問題？

Question

HI， 我使用的示例代碼從來自鏈路multiple url connection

處理多個NSURLConnection的inwhich我所指定的一個的方法，以使

CustomURLConnection *connection = [[CustomURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES tag:tag]; 

通過以下

當我使用CustomURLConnection作爲NSObject的

- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate startImmediately:(BOOL)startImmediately tag:(NSString *)_tag 

{ 
connection = [[NSURLConnection alloc] initWithRequest:request delegate:delegate startImmediately:startImmediately]; 
self.tag = _tag; 
return self; 
    } 

它給出錯誤？

Answer 1

我想你應該嘗試：

- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate startImmediately:(BOOL)startImmediately tag:(NSString *)_tag 
{ 
    if(self = [super initWithRequest:request delegate:delegate]) 
    { 
     self.tag = _tag; 
    } 
    return self; 
    } 

（如果我得到你的權利和CustomURLConnection擴展NSURLConnection的，你貼的代碼是CustomURLConnection的初始化代碼。）

Answer 2

的問題是，有沒有self 。如果從NSObjectCustomURLConnection繼承方法應該是這樣的：

- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate startImmediately:(BOOL)startImmediately tag:(NSString *)_tag { 
     if(self = [super init]) { 
     self.connection = [[[NSURLConnection alloc] initWithRequest:request delegate:delegate startImmediately:startImmediately] autorelease]; 
     self.tag = _tag; 
     } 
     return self; 
} 

你也應該確保connection是類伊娃和dealloc得到正確釋放。同爲tag確保@implementation後添加

@synthesize tag,connection; 

，並申報了Ivar標籤和屬性。