50 lines
1.2 KiB
Objective-C
50 lines
1.2 KiB
Objective-C
//
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// IfishDBHelper.m
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// Ifish
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//
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// Created by imac on 16/1/26.
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// Copyright © 2016年 imac. All rights reserved.
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//
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#import "IfishDBHelper.h"
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@implementation IfishDBHelper
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static FMDatabaseQueue *databaseQueue = nil;
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+(FMDatabaseQueue *) getDatabaseQueue
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{
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if (!databaseQueue) {
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NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
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NSString *documentDirectory = [paths objectAtIndex:0];
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NSString *dbPath = [documentDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"IfishDB"]];
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databaseQueue = [FMDatabaseQueue databaseQueueWithPath:dbPath];
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}
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return databaseQueue;
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}
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+ (BOOL) isTableOK:(NSString *)tableName withDB:(FMDatabase *)db
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{
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BOOL isOK = NO;
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FMResultSet *rs = [db executeQuery:@"select count(*) as 'count' from sqlite_master where type ='table' and name = ?",tableName];
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while ([rs next])
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{
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NSInteger count = [rs intForColumn:@"count"];
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if (0 == count)
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{
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isOK = NO;
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}
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else
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{
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isOK = YES;
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}
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}
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[rs close];
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return isOK;
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}
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@end
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