Initial commit

2017-08-15 16:59:01 +08:00
commit bdc83e07ef
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+//
+//  IfishDBHelper.m
+//  Ifish
+//
+//  Created by imac on 16/1/26.
+//  Copyright © 2016年 imac. All rights reserved.
+//
+
+#import "IfishDBHelper.h"
+
+@implementation IfishDBHelper
+static FMDatabaseQueue *databaseQueue = nil;
+(FMDatabaseQueue *) getDatabaseQueue
+{
+        if (!databaseQueue) {
+        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
+        NSString *documentDirectory = [paths objectAtIndex:0];
+        NSString *dbPath = [documentDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"IfishDB"]];
+        databaseQueue = [FMDatabaseQueue databaseQueueWithPath:dbPath];
+    }
+    
+    return databaseQueue;
+    
+}
+
+ (BOOL) isTableOK:(NSString *)tableName withDB:(FMDatabase *)db
+{
+    BOOL isOK = NO;
+    
+    FMResultSet *rs = [db executeQuery:@"select count(*) as 'count' from sqlite_master where type ='table' and name = ?",tableName];
+    while ([rs next])
+    {
+        NSInteger count = [rs intForColumn:@"count"];
+        
+        if (0 == count)
+        {
+            isOK =  NO;
+        }
+        else
+        {
+            isOK = YES;
+        }
+    }
+    [rs close];
+    
+    return isOK;
+}
+
+@end