用嵌入SQLite数据库开发ios应用,我把数据库放到SQlite管理员,然后拖到Xcode工程中。但是当我打开DB的时候,报错 out of memory ,不知道是不是SQlite的bug,因为我的文件很小,应该不会报出内存问题。
初始化数据库的代码:
- (id)initWithPath:(NSString *)path {
if (self = [super init]) {
BOOL success;
NSError *error;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *dbPath = [documentsDirectory stringByAppendingPathComponent:@"SoundLib_DB.sqlite"];
if ([fileManager fileExistsAtPath:dbPath] == NO) {
NSString *resourcePath = [[NSBundle mainBundle] pathForResource:@"SoundLib_DB" ofType:@"sqlite"];
[fileManager copyItemAtPath:resourcePath toPath:dbPath error:&error];
}
success = [fileManager fileExistsAtPath:dbPath];
if(!success)
{
NSLog(@"Cannot locate database file '%@'.", dbPath);
}
sqlite3 *dbConnection;
//Here is when I get the error, at trying to open the DB
if (sqlite3_open_v2("SoundLib", &dbConnection, SQLITE_OPEN_READWRITE, NULL) != SQLITE_OK) {
NSLog(@"[SQLITE] Unable to open database!");
NSLog(@"%s Prepare failure '%s' (%1d)", __FUNCTION__, sqlite3_errmsg(database), sqlite3_errcode(database));
return nil;
}
database = dbConnection;
}
return self;
}
报错可能是由于数据库路径传递为UTF8String
,我看见你传递"SoundLib"
,不能这样直接传递。
if (sqlite3_open([dbPath UTF8String], &databaseHandle) == SQLITE_OK)
{
//dbPath is your full database path you getting above
}
P.S.dbpath
作为const char
`
const char *dbpath
`
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