我在服务器中存储了一些图像。并尝试从URL获取此图像并存储到本地数据库然后尝试访问。但图像不存储到数据库。但是，当我使用日志时，它显示插入所有值。但我不能通过SQLiteManager
显示在db中代码：
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setImage:[UIImage imageNamed:@"button.png"] forState:UIControlStateNormal];
// [overlayButton setFrame:CGRectMake(80, 420, 60, 30)];
[btn setFrame:CGRectMake(50, 50, 30, 30)];
[btn addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
按钮点击：
-(void)click:(id)sender{
NSLog(@"click");
NSString *databasePath=[[NSBundle mainBundle]pathForResource:@"db1" ofType:@"sqlite"];
NSError *err=nil;
NSFileManager *fm=[NSFileManager defaultManager];
NSArray *arrPaths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, -1);
NSString *path=[arrPaths objectAtIndex:0];
NSString *path2= [path stringByAppendingPathComponent:@"db1.sqlite"];
bool success=[fm copyItemAtPath:databasePath toPath:path2 error:&err];
if(!success){
NSLog(@"file copied successfully");
}
/*
if(![fm fileExistsAtPath:path2])
{
bool success=[fm copyItemAtPath:databasePath toPath:path2 error:&err];
if(success)
NSLog(@"file copied successfully");
else
NSLog(@"file not copied");
}
*/
NSURL *URL = [NSURL URLWithString:@"http://myserver.net/projects/mobile/jsonstring.php"];
NSError *error;
NSString *stringFromFileAtURL = [[NSString alloc]
initWithContentsOfURL:URL
encoding:NSUTF8StringEncoding
error:&error];
//NSLog(@"response is %@", stringFromFileAtURL);
// NSString *path = [documentsDirectory stringByAppendingPathComponent:@"db1.sqlite"];
//NSLog(@"filepath %@",path);
NSString *path1 = [path stringByAppendingPathComponent:@"db1.sqlite"];
//NSDictionary *jsonDict = [stringFromFileAtURL JSONValue];
//array
NSArray *userData = [stringFromFileAtURL JSONValue];
[stringFromFileAtURL release];
int i = 0;
BOOL notExist = TRUE;
sqlite3_stmt *statement, *addStmt;
for (NSArray *skarray in userData) {
//NSLog(@"test");
if(i == 0){
//insert all main category
for (NSDictionary *tuser in skarray) {
//write all this in the table
//if already exists in data base id then overwrite the name
//category table
//NSLog(@"CategoryId is %@",[tuser objectForKey:@"cat_id"]);
//NSLog(@"CategoryName is %@",[tuser objectForKey:@"cat_name"]);
if (sqlite3_open([path1 UTF8String], &database) == SQLITE_OK) {
const char *sql = [[NSString stringWithFormat:@"SELECT id FROM categories where id = '%@'",[tuser objectForKey:@"id"]] cStringUsingEncoding:NSUTF8StringEncoding];
NSLog(@"categories select is %s", sql);
if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK) {
notExist = TRUE;
while (sqlite3_step(statement) == SQLITE_ROW) {
notExist = FALSE;
}
}
if(notExist){
//NSLog(@"cat id does not exist");
const char *sqlInsert = [[NSString stringWithFormat:@"insert into categories (id,cat_name,order_by) values('%@','%@','%@')", [tuser objectForKey:@"id"], [tuser objectForKey:@"cat_name"],[tuser objectForKey:@"order_by"]] cStringUsingEncoding:NSUTF8StringEncoding];
NSLog(@"categories insert is %s", sqlInsert);
if(sqlite3_prepare_v2(database, sqlInsert, -1, &addStmt, NULL) == SQLITE_OK)
NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database));
if(SQLITE_DONE == sqlite3_step(addStmt))
NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));
}
}
}
}
if(i == 1){
//insert all main category
for (NSDictionary *tuser in skarray) {
//write all this in the table
//if already exists in data base id then overwrite the name
//category table
//NSLog(@"CategoryId is %@",[tuser objectForKey:@"cat_id"]);
//NSLog(@"CategoryName is %@",[tuser objectForKey:@"cat_name"]);
if (sqlite3_open([path1 UTF8String], &database) == SQLITE_OK) {
const char *sql = [[NSString stringWithFormat:@"SELECT product_image FROM product where cat_id = '%@'",[tuser objectForKey:@"id"]] cStringUsingEncoding:NSUTF8StringEncoding];
// NSLog(@"product select is %s", sql);
if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK) {
notExist = TRUE;
while (sqlite3_step(statement) == SQLITE_ROW) {
notExist = FALSE;
}
}
if(notExist){
//NSLog(@"cat id does not exist");
// imgData = UIImagePNGRepresentation([tuser objectForKey:@"product_image"]);
// sqlite3_bind_blob(addStmt, 6, [imgData bytes], [imgData length], NULL);
const char *sqlInsert = [[NSString stringWithFormat:@"insert into product (id, cat_id,product_image,order_by) values ('%@','%@','%@','%@')", [tuser objectForKey:@"id"], [tuser objectForKey:@"cat_id"],[tuser objectForKey:@"product_image"],[tuser objectForKey:@"order_by"]] cStringUsingEncoding:NSUTF8StringEncoding];
NSLog(@"product insert %s", sqlInsert);
if(sqlite3_prepare_v2(database, sqlInsert, -1, &addStmt, NULL) == SQLITE_OK)
NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database));
if(SQLITE_DONE == sqlite3_step(addStmt))
NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));
}
}
}
}
if(i == 2){
//insert all main category
for (NSDictionary *tuser in skarray) {
NSLog(@"version id is %@",[tuser objectForKey:@"product_id"]);
const char *sqlInsert = [[NSString stringWithFormat:@"insert into version_app (id) values ('%@')", [tuser objectForKey:@"product_id"]] cStringUsingEncoding:NSUTF8StringEncoding];
NSLog(@"stmt is %s", sqlInsert);
if(sqlite3_prepare_v2(database, sqlInsert, -1, &addStmt, NULL) == SQLITE_OK)
NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database));
if(SQLITE_DONE == sqlite3_step(addStmt))
NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));
}
}
i++;
}
}
答案 0 :(得分：0)
你认为这里有什么问题：
bool success=[fm copyItemAtPath:databasePath toPath:path2 error:&err];
if(!success){
NSLog(@"file copied successfully");
}