iOS中FMDB的使用【单例】
DYDB.h Objective-C 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 #import <Foundation/Foundation.h> #import <FMDB/FMDatabase.h> @interface DYDB : NSObject { } @property ( nonatomic , readonly ) FMDatabase * database ; + ( DYDB * ) sharedDB ; - ( FMDatabase * ) connect ; - ( void ) clearDB ; @end DYDB.m Objective-C 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 #import “DYDB.h” #define kDYDBObvName @”dyobv.sqlite” @implementation DYDB static DYDB * _sharedDB ; + ( DYDB * ) sharedDB { if ( ! _sharedDB ) { _sharedDB = [[