我在我的iOS应用程序中将多个值存储在Sqlite数据库中。
我需要检索“cellForRowAtIndexPath”
下的值int main()
{
int a = 10;
int b = 34;
int c = a + b;
return c;
}
从这段代码中，我需要在test@test-desktop:~/Desktop/c$ ls -l
total 4
-rw-rw-r-- 1 test test 68 Jul 15 15:04 simple.c
test@test-desktop:~/Desktop/c$ gcc simple.c
test@test-desktop:~/Desktop/c$ ls -l
total 12
-rwxrwxr-x 1 test test 7151 Jul 15 15:04 a.out
-rw-rw-r-- 1 test test 68 Jul 15 15:04 simple.c
当我在- (NSString *) retrieveDetailText :(NSString *) emailAddress :(NSString *) uidText :(NSString *) folderName {
NSString *detailText = nil;
const char *dbpath = [databasePath UTF8String];
//SQLIte Statement
NSString *selettablequery = [NSString stringWithFormat:@"select * from MailFolderDBTable"];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
if (sqlite3_prepare(database, [selettablequery UTF8String], -1, &statement, NULL) ==SQLITE_OK)
{
while(sqlite3_step(statement) == SQLITE_ROW)
{
char *uidfield = (char *) sqlite3_column_text(statement, 5);
NSString *uidStr = [[NSString alloc] initWithUTF8String: uidfield];
NSLog(@"retrieveDetailText: uidStr: %@", uidStr);
if([uidStr isEqualToString:uidText]) {
char *emailstring = (char *) sqlite3_column_text(statement, 6);
NSString *detailTextData = [[NSString alloc] initWithUTF8String: emailstring];
NSData *data = [[NSData alloc] initWithBase64EncodedString:detailTextData options:NSDataBase64DecodingIgnoreUnknownCharacters];
detailText = [NSKeyedUnarchiver unarchiveObjectWithData:data];
}
下呼叫while(sqlite3_step(statement) == SQLITE_ROW)时，它未在retrieveDetailText循环播放，它只检查cellForRowAtIndexPath一次。
如何遍历while(sqlite3_step(statement) == SQLITE_ROW)，直到检查完所有行并获取值。