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我有一個iPad應用程序正在使用FMDB作爲包裝的SQLite數據庫。我能夠成功地從數據庫查詢數據;但是，當我嘗試使用executeUpdate插入數據時，該方法會正確觸發（即，我沒有收到錯誤，並返回YES），但實際上沒有任何內容插入到數據庫中。我嘗試立即檢索我剛插入的對象，它是空的。我也嘗試查看我插入的表中的行數，並且表是空的。任何想法我做錯了什麼？下面是一些代碼：它處理我所有的數據庫的工作之類的Sqlite數據庫與FMDB包裝不插入數據
--init方法
-(NSString *)getDbPath {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
return [documentsDirectory stringByAppendingPathComponent:@"iRecipeBox.db"];
}
-(id)init {
self = [super init];
if(self) {
database = [FMDatabase databaseWithPath:[self getDbPath]];
[database open];
}
return self;
}
那些會動我分貝到文檔目錄
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *docsPath = [documentsDirectory stringByAppendingPathComponent:@"iRecipeBox.db"];
if ([fileManager fileExistsAtPath:docsPath] == NO) {
NSString *resourcePath = [[NSBundle mainBundle] pathForResource:@"iRecipeBox" ofType:@"db"];
[fileManager copyItemAtPath:resourcePath toPath:docsPath error:&error];
}
return YES;
--App委託代碼}
- 將數據插入其中一個表的代碼
recipeID = [NSNumber numberWithInt:newRecipeID];
[database beginTransaction];
NSArray *newRow = [[NSArray alloc] initWithObjects:recipeID,title, description, picFile, prepTime, cookTime, ovenTemp, nil];
NSString *sql = @"insert into recipes (id, name, descr, picFile, prepTime, cookTime, ovenTemp) values (?, ?, ?, ?, ?, ?, ?)";
NSLog(@"Before update, the number of args is %i", [newRow count]);
if([database executeUpdate:sql withArgumentsInArray:newRow]) {
[database commit];
NSLog(@"the insert worked");
} else {
[database rollback];
NSLog(@"the insert failed");
}