EXC_BAD_ACCESS @synthesize

Question

.h文件中

#import <UIKit/UIKit.h> 
#import "Tardies.h" 
#import "DBAccess.h" 

@interface TardiesViewController : UITableViewController 
<UITableViewDelegate, UITableViewDataSource, UIPrintInteractionControllerDelegate> { 
    NSMutableArray *tardiesAry; 
    UITableView *table; 
} 

@property (nonatomic, retain) NSMutableArray *tardiesAry; 
@property (nonatomic, retain) IBOutlet UITableView *table; 

@end 

.m文件

#import "TardiesViewController.h" 


@implementation TardiesViewController 

@synthesize tardiesAry; 
@synthesize table; 

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 
    DBAccess *dbAccess = [[DBAccess alloc] init]; 
    self.tardiesAry = [dbAccess getTardies]; 
    [dbAccess closeDatabase]; 
    [dbAccess release]; 
    [table reloadData]; 
} 

- (void)viewDidUnload { 
    [super viewDidUnload]; 
    self.tardiesAry = nil; 
} 


- (void)dealloc { 
    [tardiesAry release]; 
} 

@end 

- (NSMutableArray *) getTardies 
{ 
// [self deleteFromTardies:@""]; 
NSLog (@"DBAccess - getTardies - 1"); 
NSMutableArray *tardies = [[[NSMutableArray alloc] init] autorelease]; 

const char *sql = "SELECT tardies.studentId, tardyDate, tardyTime, lastName, firstName, middleName FROM tardies LEFT JOIN students ON tardies.studentId = students.studentId ORDER BY tardyDate desc, tardyTime desc, lastName, firstName, middleName"; 

sqlite3_stmt *statement; 

int sqlResult = sqlite3_prepare_v2(database, sql, -1, &statement, NULL); 

if (sqlResult == SQLITE_OK) 
{ 
    NSLog (@"DBAccess - getTardies - 6"); 
    while (sqlite3_step(statement) == SQLITE_ROW) 
    { 
     Tardies *tardy = [[Tardies alloc] init]; 

     char *stuId = (char *) sqlite3_column_text(statement, 0); 
     char *trdyDate = (char *) sqlite3_column_text(statement, 1); 
     char *trdyTime = (char *) sqlite3_column_text(statement, 2); 
     char *lName = (char *) sqlite3_column_text(statement, 3); 
     char *fName = (char *) sqlite3_column_text(statement, 4); 
     char *mName = (char *) sqlite3_column_text(statement, 5); 

     tardy.studentId = (stuId) ? [NSString stringWithUTF8String:stuId] : @" "; 
     tardy.tardyDate = (trdyDate) ? [NSString stringWithUTF8String:trdyDate] : @" "; 
     tardy.tardyTime = (trdyTime) ? [NSString stringWithUTF8String:trdyTime] : @" "; 

     NSString *lNm = (lName) ? [NSString stringWithUTF8String:lName] : @" "; 
     NSString *fNm = (fName) ? [NSString stringWithUTF8String:fName] : @" "; 
     NSString *mNm = (mName) ? [NSString stringWithUTF8String:mName] : @" "; 
     tardy.fullName = [NSString stringWithFormat:@"%@, %@ %@", lNm, fNm, mNm]; 

     NSDictionary *tardyDict = [[NSDictionary alloc] initWithObjectsAndKeys:tardy.studentId, @"studentId", 
            tardy.tardyDate, @"tardyDate", 
            tardy.tardyTime, @"tardyTime", 
            tardy.fullName, @"fullName", 
            nil]; 
     [tardies addObject:tardyDict]; 

     [tardy release]; 
     [tardyDict release]; 
    } 
    // Finalize the statement to release its resources 
    sqlite3_finalize(statement);   
} 
else 
{ 
    NSLog (@"Problem with the database:"); 
    NSLog (@"%d", sqlResult); 
} 
return tardies; 
} 

- (void) closeDatabase 
{ 
    // Close the database 
    if (sqlite3_close(database) != SQLITE_OK) 
    { 
    // NSAssert1(0, @"Error: failed to close database: '%s' .", sqlite3_errmsg(database)); 
    } 
} 

的Xcode 4.0版编译4A304a

第一次setTardiesAry运行，它是好的，第二这时，程序上错误的@synthesize tardiesAry行失败： 线程1：程序接收到的信号“EXC_BAD_ACCESS”。

我试图重写方法setTardiesAry，未能在该方法而不是@synthesize行模式。

请帮帮忙，我不知道如何继续。

有人曾在getTardies自动释放。

Answer 1

修改

这里与乌尔的dealloc

- (void)dealloc { 

    [self.tardiesAry release]; 

}