FMDatabase 数据库
1.下载FMDatabase
导入下载里面的src文件，删了fmdb.m文件
2.引入framework:libsqlite3.dylib
3.引入头文件
#import "FMDatabase.h”
数据库文件要兼容iPhone4和iPhone5需要放在Document或Library目录中,先判断Document/Library中数据库文件(一般是.sqlite后缀)是否存在,如果不存在则从工程(bundle)中把数据库文件拷贝到Document中或Library中。
以下是我是我工程中用过的一个数据库操作代码，记下来，免得忘记了：
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-(void)operateDB:(NSInteger)num andRow:(NSInteger)row status:(NSInteger)status{
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self.deleteOld = YES;
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self.dbFile = @"shopCar_db.sqlite";
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NSFileManager *manager = [NSFileManager defaultManager];
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NSString *dbPath = [Utilities documentsPath:self.dbFile];
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if (![manager fileExistsAtPath:dbPath]) {
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NSString *bundlePath = [Utilities bundlePath:self.dbFile];
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if ([manager copyItemAtPath:bundlePath toPath:dbPath error:nil]) {
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NSLog(@"copy ok...");
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}
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else
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{
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NSLog(@"copy error...");
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}
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}
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else{
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if (self.deleteOld) {
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NSLog(@"delete old and create new..");
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NSString *bundlePath = [Utilities bundlePath:self.dbFile];
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[manager removeItemAtPath:dbPath error:nil];
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[manager copyItemAtPath:bundlePath toPath:dbPath error:nil];
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}
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else
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{
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NSLog(@"do nothing...");
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}
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}
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FMDatabase *db = [FMDatabase databaseWithPath:dbPath];
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NSLog(@"begin to db...");
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if ([db open]) {
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if(status == 1){
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NSLog(@"增减.......");
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}
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if(status == 2){
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NSString *sql = [NSString stringWithFormat:@"delete from shopCar_tb where id = %i",row];
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[db executeUpdate:sql];
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}
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if(status == 3){
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NSLog(@"查询........");
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}
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if(status == 4){
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NSString *sql = [NSString stringWithFormat:@"UPDATE shopCar_tb SET num = ‘%d‘ WHERE id = %d",num,row];
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[db executeUpdate:sql];
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}
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NSString *sql = @"select * from shopCar_tb";
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FMResultSet *result = [db executeQuery:sql];
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_mutableArrayData = [[NSMutableArray alloc] init];
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[_mutableArrayData removeAllObjects];
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[_mutableDictionayData removeAllObjects];
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while ([result next]) {
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_mutableDictionayData = [[NSMutableDictionary alloc] init];
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NSString *sid = [result stringForColumn:@"id"];
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[_mutableDictionayData setObject:sid forKey:@"id"];
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NSString *name = [result stringForColumn:@"name"];
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[_mutableDictionayData setObject:name forKey:@"name"];
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NSString *gid = [result stringForColumn:@"gid"];
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[_mutableDictionayData setObject:gid forKey:@"gid"];
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NSString *num = [result stringForColumn:@"num"];
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[_mutableDictionayData setObject:num forKey:@"num"];
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NSLog(@"num = %i",[num intValue]);
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NSString *price = [result stringForColumn:@"price"];
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[_mutableDictionayData setObject:price forKey:@"price"];
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NSString *path = [result stringForColumn:@"path"];
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[_mutableDictionayData setObject:path forKey:@"path"];
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[_mutableArrayData addObject:_mutableDictionayData];
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}
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}
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[db close];
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NSLog(@"end db...");
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}
iOS数据库操作fmdb1： FMDB数据库使用
原文：http://blog.csdn.net/sammyieveo/article/details/41680675
