ios sqlite3数据库仅在某些ios版本上没有此类表
我的sqlite3数据库有一个奇怪的问题 它在以下版本的模拟器中工作:ios sqlite3数据库仅在某些ios版本上没有此类表,ios,objective-c,iphone,ipad,sqlite,Ios,Objective C,Iphone,Ipad,Sqlite,我的sqlite3数据库有一个奇怪的问题 它在以下版本的模拟器中工作: ipad 2 ios 8.4 ipad 视网膜ios 8.4 iPhone4iOS8.4 iPhone5 ios 8.4 iPhone6iOS 8.4 但它在ipad Air ios 8.4上不起作用,我收到了一个错误,没有这样的表格收藏夹 类似地,我已经在ios 8.1上进行了测试,它可以在除iphone 5之外的所有设备上运行,但在ios 5s上也可以运行 当我在TextEdit中打开sql数据库文件时,它看起来像这
- ipad 2 ios 8.4 ipad
- 视网膜ios 8.4
- iPhone4iOS8.4
- iPhone5 ios 8.4
- iPhone6iOS 8.4
SQLite format 3@ -Ê
mmÅ!!ÅktablefavouritesfavouritesCREATE TABLE favourites(favouriteID integer primary key, tomhaisID integer, tomhaisText text, answered integer)
我从控制台创建了数据库,只有当我打开文件时,我才能看到这些额外的字符:在控制台的SQLite3模式下,我输入了如下Create Table命令:
`CREATE TABLE favourites(favouriteID integer primary key, tomhaisID integer, tomhaisText text, answered integer);`
//
// DBManager.m
// Facts
//
// Created by Linda Keating on 28/05/2015.
// Copyright (c) 2015 LindaKeating. All rights reserved.
//
#import "DBManager.h"
@interface DBManager()
@property (nonatomic, strong) NSString *documentsDirectory;
@property (nonatomic, strong) NSString *databaseFilename;
@property (nonatomic, strong) NSMutableArray *arrResults;
-(void)runQuery:(const char *)query isQueryExecutable:(BOOL)queryExecutable;
-(void)copyDatabaseIntoDocumentsDirectory;
@end
@implementation DBManager
-(instancetype)initWithDatabaseFilename:(NSString *)dbFilename{
self = [super init];
if (self) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
self.documentsDirectory = [paths objectAtIndex:0];
self.databaseFilename = dbFilename;
[self copyDatabaseIntoDocumentsDirectory];
}
return self;
}
-(void)copyDatabaseIntoDocumentsDirectory{
NSString *destinationPath = [self.documentsDirectory stringByAppendingPathComponent:self.databaseFilename];
if (![[NSFileManager defaultManager] fileExistsAtPath:destinationPath]) {
NSString *sourePath = [[[NSBundle mainBundle]resourcePath] stringByAppendingPathComponent:self.databaseFilename];
NSError *error;
[[NSFileManager defaultManager] copyItemAtPath:sourePath toPath:destinationPath error:&error];
if (error != nil) {
NSLog(@"%@", [error localizedDescription]);
}
}
}
-(void) runQuery:(const char *)query isQueryExecutable:(BOOL)queryExecutable{
sqlite3 *sqlite3Database;
NSString *databasePath = [self.documentsDirectory stringByAppendingPathComponent:self.databaseFilename];
if (self.arrResults != nil) {
[self.arrResults removeAllObjects];
self.arrResults = nil;
}
self.arrResults = [[NSMutableArray alloc] init];
if (self.arrColumnNames != nil) {
[self.arrColumnNames removeAllObjects];
self.arrColumnNames = nil;
}
self.arrColumnNames = [[NSMutableArray alloc] init];
BOOL openDatabaseResult = sqlite3_open([databasePath UTF8String], &sqlite3Database);
if (openDatabaseResult == SQLITE_OK){
sqlite3_stmt *compiledStatement;
BOOL prepareStatementResult = sqlite3_prepare_v2(sqlite3Database, query, -1, &compiledStatement, NULL);
if (prepareStatementResult == SQLITE_OK) {
if (!queryExecutable) {
NSMutableArray *arrDataRow;
while (sqlite3_step(compiledStatement) == SQLITE_ROW) {
arrDataRow = [[NSMutableArray alloc]init];
int totalColumns = sqlite3_column_count(compiledStatement);
for (int i=0; i<totalColumns; i++) {
char *dbDataAsChars = (char *)sqlite3_column_text(compiledStatement, i);
if (dbDataAsChars != NULL) {
[arrDataRow addObject:[NSString stringWithUTF8String:dbDataAsChars]];
}
if (self.arrColumnNames.count != totalColumns) {
dbDataAsChars = (char *)sqlite3_column_name(compiledStatement, i);
[self.arrColumnNames addObject:[NSString stringWithUTF8String:dbDataAsChars]];
}
}
if (arrDataRow.count >0) {
[self.arrResults addObject:arrDataRow];
}
}
}
else{
// BOOL executeQueryResults = sqlite3_step(compiledStatement);
if (sqlite3_step(compiledStatement)== SQLITE_DONE) {
self.affectedRows = sqlite3_changes(sqlite3Database);
self.lastInsertedRowID = sqlite3_last_insert_rowid(sqlite3Database);
}
else{
NSLog(@"DB Error: %s", sqlite3_errmsg(sqlite3Database));
}
}
}
else{
NSLog(@"%s", sqlite3_errmsg(sqlite3Database));
}
sqlite3_finalize(compiledStatement);
}
sqlite3_close(sqlite3Database);
}
-(NSArray *)loadDataFromDB:(NSString *)query{
[self runQuery:[query UTF8String] isQueryExecutable:NO];
return (NSArray *)self.arrResults;
}
-(void)executeQuery:(NSString *)query{
[self runQuery:[query UTF8String] isQueryExecutable:YES];
}
@end
你知道我为什么会看到这种不一致的行为吗
我的DBManager文件如下所示:
`CREATE TABLE favourites(favouriteID integer primary key, tomhaisID integer, tomhaisText text, answered integer);`
//
// DBManager.m
// Facts
//
// Created by Linda Keating on 28/05/2015.
// Copyright (c) 2015 LindaKeating. All rights reserved.
//
#import "DBManager.h"
@interface DBManager()
@property (nonatomic, strong) NSString *documentsDirectory;
@property (nonatomic, strong) NSString *databaseFilename;
@property (nonatomic, strong) NSMutableArray *arrResults;
-(void)runQuery:(const char *)query isQueryExecutable:(BOOL)queryExecutable;
-(void)copyDatabaseIntoDocumentsDirectory;
@end
@implementation DBManager
-(instancetype)initWithDatabaseFilename:(NSString *)dbFilename{
self = [super init];
if (self) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
self.documentsDirectory = [paths objectAtIndex:0];
self.databaseFilename = dbFilename;
[self copyDatabaseIntoDocumentsDirectory];
}
return self;
}
-(void)copyDatabaseIntoDocumentsDirectory{
NSString *destinationPath = [self.documentsDirectory stringByAppendingPathComponent:self.databaseFilename];
if (![[NSFileManager defaultManager] fileExistsAtPath:destinationPath]) {
NSString *sourePath = [[[NSBundle mainBundle]resourcePath] stringByAppendingPathComponent:self.databaseFilename];
NSError *error;
[[NSFileManager defaultManager] copyItemAtPath:sourePath toPath:destinationPath error:&error];
if (error != nil) {
NSLog(@"%@", [error localizedDescription]);
}
}
}
-(void) runQuery:(const char *)query isQueryExecutable:(BOOL)queryExecutable{
sqlite3 *sqlite3Database;
NSString *databasePath = [self.documentsDirectory stringByAppendingPathComponent:self.databaseFilename];
if (self.arrResults != nil) {
[self.arrResults removeAllObjects];
self.arrResults = nil;
}
self.arrResults = [[NSMutableArray alloc] init];
if (self.arrColumnNames != nil) {
[self.arrColumnNames removeAllObjects];
self.arrColumnNames = nil;
}
self.arrColumnNames = [[NSMutableArray alloc] init];
BOOL openDatabaseResult = sqlite3_open([databasePath UTF8String], &sqlite3Database);
if (openDatabaseResult == SQLITE_OK){
sqlite3_stmt *compiledStatement;
BOOL prepareStatementResult = sqlite3_prepare_v2(sqlite3Database, query, -1, &compiledStatement, NULL);
if (prepareStatementResult == SQLITE_OK) {
if (!queryExecutable) {
NSMutableArray *arrDataRow;
while (sqlite3_step(compiledStatement) == SQLITE_ROW) {
arrDataRow = [[NSMutableArray alloc]init];
int totalColumns = sqlite3_column_count(compiledStatement);
for (int i=0; i<totalColumns; i++) {
char *dbDataAsChars = (char *)sqlite3_column_text(compiledStatement, i);
if (dbDataAsChars != NULL) {
[arrDataRow addObject:[NSString stringWithUTF8String:dbDataAsChars]];
}
if (self.arrColumnNames.count != totalColumns) {
dbDataAsChars = (char *)sqlite3_column_name(compiledStatement, i);
[self.arrColumnNames addObject:[NSString stringWithUTF8String:dbDataAsChars]];
}
}
if (arrDataRow.count >0) {
[self.arrResults addObject:arrDataRow];
}
}
}
else{
// BOOL executeQueryResults = sqlite3_step(compiledStatement);
if (sqlite3_step(compiledStatement)== SQLITE_DONE) {
self.affectedRows = sqlite3_changes(sqlite3Database);
self.lastInsertedRowID = sqlite3_last_insert_rowid(sqlite3Database);
}
else{
NSLog(@"DB Error: %s", sqlite3_errmsg(sqlite3Database));
}
}
}
else{
NSLog(@"%s", sqlite3_errmsg(sqlite3Database));
}
sqlite3_finalize(compiledStatement);
}
sqlite3_close(sqlite3Database);
}
-(NSArray *)loadDataFromDB:(NSString *)query{
[self runQuery:[query UTF8String] isQueryExecutable:NO];
return (NSArray *)self.arrResults;
}
-(void)executeQuery:(NSString *)query{
[self runQuery:[query UTF8String] isQueryExecutable:YES];
}
@end
//
//DBManager.m
//事实
//
//由Linda Keating于2015年5月28日创建。
//版权所有(c)2015 LindaKeating。版权所有。
//
#导入“DBManager.h”
@接口DBManager()
@属性(非原子,强)NSString*documentsDirectory;
@属性(非原子,强)NSString*数据库文件名;
@属性(非原子,强)NSMutableArray*arrResults;
-(void)runQuery:(const char*)查询可执行:(BOOL)查询可执行;
-(作废)复制数据库到文档目录;
@结束
@实现数据库管理器
-(instancetype)initWithDatabaseFilename:(NSString*)dbFilename{
self=[super init];
如果(自我){
NSArray*Path=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,是);
self.documentsDirectory=[path objectAtIndex:0];
self.databaseFilename=dbFilename;
[自复制数据库到文档目录];
}
回归自我;
}
-(无效)CopyDatabaseInDocuments目录{
NSString*destinationPath=[self.documentsDirectoryStringByAppendingPathComponent:self.databaseFilename];
如果(![[NSFileManager defaultManager]fileExistsAtPath:destinationPath]){
NSString*sourePath=[[[NSBundle mainBundle]resourcePath]stringByAppendingPathComponent:self.databaseFilename];
n错误*错误;
[[NSFileManager defaultManager]copyItemAtPath:sourePath-toPath:destinationPath错误:&错误];
如果(错误!=nil){
NSLog(@“%@,[错误本地化描述]);
}
}
}
-(void)runQuery:(const char*)查询可执行:(BOOL)可执行查询{
sqlite3*sqlite3数据库;
NSString*databasePath=[self.documentsDirectoryStringByAppendingPathComponent:self.databaseFilename];
如果(self.arresults!=nil){
[self.arrveallobjects];
self.arresults=nil;
}
self.arrResults=[[NSMutableArray alloc]init];
if(self.arrColumnNames!=nil){
[self.arrColumnNames removeAllObjects];
self.arrColumnNames=nil;
}
self.arrColumnNames=[[NSMutableArray alloc]init];
BOOL openDatabaseResult=sqlite3_open([databasePath UTF8String],&sqlite3Database);
如果(openDatabaseResult==SQLITE_OK){
sqlite3_stmt*编译语句;
BOOL prepareStatementResult=sqlite3\u prepare\u v2(sqlite3Database,query,-1,&compiledStatement,NULL);
如果(prepareStatementResult==SQLITE_OK){
如果(!queryExecutable){
NSMutableArray*arrDataRow;
while(sqlite3_步骤(compiledStatement)==SQLITE_行){
arrDataRow=[[NSMutableArray alloc]init];
int totalColumns=sqlite3\u column\u count(compiledStatement);
对于(int i=0;i0){
[self.arrdesults addObject:arrDataRow];
}
}
}
否则{
//BOOL executeQueryResults=sqlite3\u步骤(compiledStatement);
if(sqlite3_步骤(compiledStatement)=SQLITE_完成){
self.affectedRows=sqlite3\u变更(sqlite3Database);
self.lastInsertedRowID=sqlite3\u last\u insert\u rowid(sqlite3Database);
}
否则{
NSLog(@“数据库错误:%s”,sqlite3_errmsg(sqlite3Database));
}
}
}
否则{
NSLog(@“%s”,sqlite3_errmsg(sqlite3Database));
}
sqlite3_最终确定(编译语句);
}
sqlite3_close(sqlite3Database);
}
-(NSArray*)loadDataFromDB:(NSString*)查询{
[自运行查询:[query UTF8String]isQueryExecutable:否];
返回(NSArray*)self.arresults;
}
-(void)executeQuery:(NSString*)查询{
[自运行查询:[query UTF8String]isQueryExecutable:是];
}
@结束
我不认为这与设备有关,而是与时间有关
release
模式,而不是debug
李>
openDatabaseResult
或queryExecutable
设置为NO