線程參數Objective-C

Question

嘗試在線程中使用類變量並獲取EXC_BAS_ACCESS。 代碼片段：

@interface ViewController : UIViewController {  
    NSString* accountLoginName; 
    NSString* accountPassword; 
} 

實施：

accountLoginName = [NSString stringWithString:textFieldLoginName.text]; 
accountPassword = [NSString stringWithString:textFieldPassword.text]; 
[self performSelectorInBackground:@selector(loginAtBackgroundSelector:) withObject:nil]; 


-(void)loginAtBackgroundSelector:(UIAlertView*)alert 
{ 
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; 
    NSLog(@"%@\n%@", accountLoginName, accountPassword); 
    [self login]; 
    [self dismissAlert:alert]; 
    [pool release]; 
} 

只是想寫信給控制檯，在這部分代碼得到錯誤，但在loginAtBackgroundSelector錯誤的時間出現的時間。在實施

@interface ViewController : UIViewController {  
    NSString* accountLoginName; 
    NSString* accountPassword; 
} 
@property(nonatomic, retain) NSString* accountLoginName; 
@property(nonatomic, retain) NSString* accountPassword; 

這（在地方，你分配值）：Additionaly中的dealloc

self.accountLoginName = [NSString stringWithString:textFieldLoginName.text]; 
self.accountPassword = [NSString stringWithString:textFieldPassword.text]; 
[self performSelectorInBackground:@selector(loginAtBackgroundSelector:) withObject:nil]; 

：

-(AlertType)login 
{ 
    NSLog(@"%@\n%@", accountLoginName, accountPassword); 
} 

Answer 1

接口試試這個

-(void)dealloc { 
    [accountLoginName release]; 
    [accountPassword release]; 
    [super dealloc]; 
} 

讓我知道他是否他LPS。