iOS菜鸟之FMDB的二次封装简单易用

闲来无事写点东西，希望大家多多指正！

大家先去git下载FMDB，然后将其中source文件夹中的fmdb文件夹拖入自己的项目中。最后就可以引用下面的代码对fmdb进行一次简单的封装。

这样可以更直观的使用数据库进行增删改操作。

/**

* 可以存储数据类型 text integer blob boolean date

* keyTypes 存储的字段 以及对应数据类型

* keyValues 存储的字段 以及对应的值

*/

#import <Foundation/Foundation.h>

#import <UIKit/UIKit.h>

#import "FMDB.h"

@interface YZKDBTool : NSObject

/**

* 数据库工具单例

*

* @return 数据库工具对象

*/

+(YZKDBTool *)tool;

/**

* 创建数据库

*

* @param dbName 数据库名称(带后缀.sqlite)

*/

-(FMDatabase *)getDBWithDBName:(NSString *)dbName;

/**

* 给指定数据库建表

*

* @param db 指定数据库对象

* @param tableName 表的名称

* @param keyTypes 所含字段以及对应字段类型 字典

*/

-(void)DataBase:(FMDatabase *)db createTable:(NSString *)tableName keyTypes:(NSDictionary *)keyTypes;

/**

* 给指定数据库的表添加值

*

* @param db 数据库名称

* @param keyValues 字段及对应的值

* @param tableName 表名

*/

-(void)DataBase:(FMDatabase *)db insertKeyValues:(NSDictionary *)keyValues intoTable:(NSString *)tableName;

/**

* 给指定数据库的表更新值

*

* @param db 数据库名称

* @param keyValues 要更新字段及对应的值

* @param tableName 表名

*/

-(void)DataBase:(FMDatabase *)db updateTable:(NSString *)tableName setKeyValues:(NSDictionary *)keyValues;

/**

* 条件更新

*

* @param db 数据库名称

* @param tableName 表名称

* @param keyValues 要更新的字段及对应值

* @param condition 条件

*/

-(void)DataBase:(FMDatabase *)db updateTable:(NSString *)tableName setKeyValues:(NSDictionary *)keyValues whereCondition:(NSDictionary *)condition;

/**

* 查询数据库表中的所有值 限制数据条数10

*

* @param db 数据库名称

* @param keysTypes 查询字段以及对应字段类型 字典

* @param tableName 表名称

* @return 查询得到数据

*/

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName;

/**

* 条件查询数据库中的数据 限制数据条数10

*

* @param db 数据库名称

* @param keysTypes 查询字段以及对应字段类型 字典

* @param tableName 表名称

* @param condition 条件

*

* @return 查询得到数据 限制数据条数10

*/

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName whereCondition:(NSDictionary *)condition;

/**

* 模糊查询 某字段以指定字符串开头的数据 限制数据条数10

*

* @param db 数据库名称

* @param keysTypes 查询字段以及对应字段类型 字典

* @param tableName 表名称

* @param key 条件字段

* @param str 开头字符串

*

* @return 查询所得数据 限制数据条数10

*/

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName whereKey:(NSString *)key beginWithStr:(NSString *)str;

/**

* 模糊查询 某字段包含指定字符串的数据 限制数据条数10

*

* @param db 数据库名称

* @param keysTypes 查询字段以及对应字段类型 字典

* @param tableName 表名称

* @param key 条件字段

* @param str 所包含的字符串

*

* @return 查询所得数据

*/

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName whereKey:(NSString *)key containStr:(NSString *)str;

/**

* 模糊查询 某字段以指定字符串结尾的数据 限制数据条数10

*

* @param db 数据库名称

* @param keysTypes 查询字段以及对应字段类型 字典

* @param tableName 表名称

* @param key 条件字段

* @param str 结尾字符串

*

* @return 查询所得数据

*/

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName whereKey:(NSString *)key endWithStr:(NSString *)str;

/**

* 清理指定数据库中的数据 （只删除数据不删除数据库）

*

* @param db 指定数据库

*/

-(void)clearDatabase:(FMDatabase *)db from:(NSString *)tableName;

@end

#import "YZKDBTool.h"

static YZKDBTool *tool = nil;

@implementation YZKDBTool

+(YZKDBTool *)tool

{

static dispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

if (tool == nil) {

tool = [[self alloc] init];

}

});

return tool;

}

+(instancetype)allocWithZone:(struct _NSZone *)zone

{

static dispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

if (tool == nil) {

tool = [super allocWithZone:zone];

}

});

return tool;

}

#pragma mark --创建数据库

-(FMDatabase *)getDBWithDBName:(NSString *)dbName

{

NSArray *library = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);

NSString *dbPath = [library[0] stringByAppendingPathComponent:dbName];

NSLog(@"%@", dbPath);

FMDatabase *db = [FMDatabase databaseWithPath:dbPath];

if (![db open]) {

NSLog(@"无法获取数据库");

return nil;

}

return db;

}

#pragma mark --给指定数据库建表

-(void)DataBase:(FMDatabase *)db createTable:(NSString *)tableName keyTypes:(NSDictionary *)keyTypes

{

if ([self isOpenDatabese:db]) {

NSMutableString *sql = [[NSMutableString alloc] initWithString:[NSString stringWithFormat:@"CREATE TABLE IF NOT EXISTS %@ (",tableName]];

int count = 0;

for (NSString *key in keyTypes) {

count++;

[sql appendString:key];

[sql appendString:@" "];

[sql appendString:[keyTypes valueForKey:key]];

if (count != [keyTypes count]) {

[sql appendString:@", "];

}

}

[sql appendString:@")"];

// NSLog(@"%@", sql);

[db executeUpdate:sql];

}

}

#pragma mark --给指定数据库的表添加值

-(void)DataBase:(FMDatabase *)db insertKeyValues:(NSDictionary *)keyValues intoTable:(NSString *)tableName

{

if ([self isOpenDatabese:db]) {

// int count = 0;

// NSString *Key = [[NSString alloc] init];

// for (NSString *key in keyValues) {

// if(count == 0){

// NSMutableString *sql = [[NSMutableString alloc] initWithString:[NSString stringWithFormat:@"INSERT INTO %@ (%@) VALUES (?)",tableName, key]];

// [db executeUpdate:sql,[keyValues valueForKey:key]];

// Key = key;

// }else

// {

// NSMutableString *sql = [[NSMutableString alloc] initWithString:[NSString stringWithFormat:@"UPDATE %@ SET %@ = ? WHERE %@ = ?", tableName, key, Key]];

// [db executeUpdate:sql,[keyValues valueForKey:key],[keyValues valueForKey:Key]];

// }

// count++;

// }

NSArray *keys = [keyValues allKeys];

NSArray *values = [keyValues allValues];

NSMutableString *sql = [[NSMutableString alloc] initWithString:[NSString stringWithFormat:@"INSERT INTO %@ (", tableName]];

NSInteger count = 0;

for (NSString *key in keys) {

[sql appendString:key];

count ++;

if (count < [keys count]) {

[sql appendString:@", "];

}

}

[sql appendString:@") VALUES ("];

for (int i = 0; i < [values count]; i++) {

[sql appendString:@"?"];

if (i < [values count] - 1) {

[sql appendString:@","];

}

}

[sql appendString:@")"];

NSLog(@"%@", sql);

[db executeUpdate:sql withArgumentsInArray:values];

}

}

#pragma mark --给指定数据库的表更新值

-(void)DataBase:(FMDatabase *)db updateTable:(NSString *)tableName setKeyValues:(NSDictionary *)keyValues

{

if ([self isOpenDatabese:db]) {

for (NSString *key in keyValues) {

NSMutableString *sql = [[NSMutableString alloc] initWithString:[NSString stringWithFormat:@"UPDATE %@ SET %@ = ?", tableName, key]];

[db executeUpdate:sql,[keyValues valueForKey:key]];

}

}

}

#pragma mark --条件更新

-(void)DataBase:(FMDatabase *)db updateTable:(NSString *)tableName setKeyValues:(NSDictionary *)keyValues whereCondition:(NSDictionary *)condition

{

if ([self isOpenDatabese:db]) {

for (NSString *key in keyValues) {

NSMutableString *sql = [[NSMutableString alloc] initWithString:[NSString stringWithFormat:@"UPDATE %@ SET %@ = ? WHERE %@ = ?", tableName, key, [condition allKeys][0]]];

[db executeUpdate:sql,[keyValues valueForKey:key],[keyValues valueForKey:[condition allKeys][0]]];

}

}

}

#pragma mark --查询数据库表中的所有值

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName

{

FMResultSet *result = [db executeQuery:[NSString stringWithFormat:@"SELECT * FROM %@ LIMIT 10",tableName]];

return [self getArrWithFMResultSet:result keyTypes:keyTypes];

}

#pragma mark --条件查询数据库中的数据

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName whereCondition:(NSDictionary *)condition;

{

if ([self isOpenDatabese:db]) {

FMResultSet *result = [db executeQuery:[NSString stringWithFormat:@"SELECT * FROM %@ WHERE %@ = ? LIMIT 10",tableName, [condition allKeys][0]], [condition valueForKey:[condition allKeys][0]]];

return [self getArrWithFMResultSet:result keyTypes:keyTypes];

}else

return nil;

}

#pragma mark --模糊查询 某字段以指定字符串开头的数据

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName whereKey:(NSString *)key beginWithStr:(NSString *)str

{

if ([self isOpenDatabese:db]) {

FMResultSet *result = [db executeQuery:[NSString stringWithFormat:@"SELECT * FROM %@ WHERE %@ LIKE %@%% LIMIT 10",tableName, key, str]];

return [self getArrWithFMResultSet:result keyTypes:keyTypes];

}else

return nil;

}

#pragma mark --模糊查询 某字段包含指定字符串的数据

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName whereKey:(NSString *)key containStr:(NSString *)str

{

if ([self isOpenDatabese:db]) {

FMResultSet *result = [db executeQuery:[NSString stringWithFormat:@"SELECT * FROM %@ WHERE %@ LIKE %%%@%% LIMIT 10",tableName, key, str]];

return [self getArrWithFMResultSet:result keyTypes:keyTypes];

}else

return nil;

}

#pragma mark --模糊查询 某字段以指定字符串结尾的数据

-(NSArray *)DataBase:(FMDatabase *)db selectKeyTypes:(NSDictionary *)keyTypes fromTable:(NSString *)tableName whereKey:(NSString *)key endWithStr:(NSString *)str

{

if ([self isOpenDatabese:db]) {

FMResultSet *result = [db executeQuery:[NSString stringWithFormat:@"SELECT * FROM %@ WHERE %@ LIKE %%%@ LIMIT 10",tableName, key, str]];

return [self getArrWithFMResultSet:result keyTypes:keyTypes];

}else

return nil;

}

#pragma mark --清理指定数据库中的数据

-(void)clearDatabase:(FMDatabase *)db from:(NSString *)tableName

{

if ([self isOpenDatabese:db]) {

[db executeUpdate:[NSString stringWithFormat:@"DELETE FROM %@",tableName]];

}

}

#pragma mark --CommonMethod

-(NSArray *)getArrWithFMResultSet:(FMResultSet *)result keyTypes:(NSDictionary *)keyTypes

{

NSMutableArray *tempArr = [NSMutableArray array];

while ([result next]) {

NSMutableDictionary *tempDic = [NSMutableDictionary dictionary];

for (int i = 0; i < keyTypes.count; i++) {

NSString *key = [keyTypes allKeys][i];

NSString *value = [keyTypes valueForKey:key];

if ([value isEqualToString:@"text"]) {

// 字符串

[tempDic setValue:[result stringForColumn:key] forKey:key];

}else if([value isEqualToString:@"blob"])

{

// 二进制对象

[tempDic setValue:[result dataForColumn:key] forKey:key];

}else if ([value isEqualToString:@"integer"])

{

// 带符号整数类型

[tempDic setValue:[NSNumber numberWithInt:[result intForColumn:key]]forKey:key];

}else if ([value isEqualToString:@"boolean"])

{

// BOOL型

[tempDic setValue:[NSNumber numberWithBool:[result boolForColumn:key]] forKey:key];

}else if ([value isEqualToString:@"date"])

{

// date

[tempDic setValue:[result dateForColumn:key] forKey:key];

}

}

[tempArr addObject:tempDic];

}

return tempArr;

}

-(BOOL)isOpenDatabese:(FMDatabase *)db

{

if (![db open]) {

[db open];

}

return YES;

}

@end