ios中Pldatabase的用法(3)

#import "ViewController.h"

@interface ViewController ()
@property(nonatomic,retain)PLSqliteDatabase *db;
@end

@implementation ViewController


#pragma mark -生命周期方法
-(void)dealloc{
    self.db=nil;
    [super dealloc];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self OpenDb];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark -事件
- (IBAction)createTable:(id)sender {
    [self createTable];
}

- (IBAction)ExtistTable:(id)sender {
}

- (IBAction)Insert:(id)sender {
    [self InsertData];
}

- (IBAction)update:(id)sender {
    [self UpdateData];
}

- (IBAction)delete1:(id)sender {
    [self deletedata];
}
- (IBAction)select1:(id)sender {
    [self selectdata1];
}

#pragma mark--数据库操作
-(void)OpenDb{
   NSString *path= [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    path=[path stringByAppendingPathComponent:@"test.db"];
    //open db
    PLSqliteDatabase *sqldb=[[PLSqliteDatabase alloc] initWithPath:path];//没有数据库，会创建一个的

    if(![sqldb open]){
        NSLog(@"没有打开数据库");
        
    }
    self.db=sqldb;
 
    [sqldb release];
}

-(void)createTable{
    if (![self.db tableExists:@"TEST"]) {
        if(![self.db executeUpdate:@"CREATE TABLE TEST (id integer primary key autoincrement,name text,age integer)"]){
            NSLog(@"create table faild");
        }
    }
    else{
        NSLog(@"表已经存在");
    }
   
}

-(void)InsertData{
   NSString *sql=@"INSERT INTO TEST(name,age) values(?,?)";
    
    if([self.db executeUpdate:sql,@"gcb",@12]){//注意参数必须是oc对象
        NSLog(@"insert success");
    }
    else{
        NSLog(@"insert failed");
    }
    
}

-(void)UpdateData{
  NSString *sql=@"UPDATE TEST SET name=?,age=? where id=?";
    if([self.db executeUpdate:sql,@"ios",@2013,@2]){//注意参数必须是oc对象
        NSLog(@"update success");
    }
    else{
        NSLog(@"updata failed");
    }
}

-(void)selectdata{
     NSString *sql=@"SELECT id,name,age FROM TEST WHERE id=?";
    id<PLResultSet> result=[self.db executeQuery:sql,@1];
    while ([result next]) {
    int pid=[result intForColumn:@"id"];
        NSString *name=[result stringForColumn:@"name"];
        int32_t age=[result intForColumn:@"age"];
        NSLog(@"id=%zi,name=%@,age=%zi",pid,name,age);
    }
}

-(void)selectdata1{
   // NSString *sql=@"SELECT id,name,age FROM TEST WHERE (id like '%%%@%%' OR age like '%%@%%' ";
    NSString *sql=[NSString stringWithFormat:@"SELECT id,name,age FROM TEST WHERE (id like'%%%@%%' OR age like '%%%@%%')",@1,@2];
    
    id<PLResultSet> result=[self.db executeQuery:sql];
    while ([result next]) {
        int pid=[result intForColumn:@"id"];
        NSString *name=[result stringForColumn:@"name"];
        int32_t age=[result intForColumn:@"age"];
        NSLog(@"id=%zi,name=%@,age=%zi",pid,name,age);
    }
}

-(void)deletedata{
    NSString *sql=@"DELETE FROM TEST WHERE id=?";
    if([self.db executeUpdate:sql,@1]){
        NSLog(@"delete success");
    }
    else{
        NSLog(@"delete failed");
    }
}

 插入的另一种方法(如果是要封装，可以考虑下面）

-(void)InsertData1{
    NSString *sql=@"INSERT INTO TEST(name,age) values(:name,:age)";
    
    id<PLPreparedStatement> stm=[self.db prepareStatement:sql];
    NSMutableDictionary *dic=[NSMutableDictionary dictionary];
    [dic setObject:@"tt" forKey:@"name"];
    [dic setObject:@12 forKey:@"age"];
    [stm bindParameterDictionary:dic];
    
    if([stm executeUpdate]){
        NSLog(@"ss");
    }
    

-(void) selectdate2{
    NSString *sql=@"SELECT id,name,age FROM TEST WHERE id=:id";
    id<PLPreparedStatement> stmp=[self.db prepareStatement:sql];
    NSMutableDictionary *dic=[NSMutableDictionary dictionary];
    [dic setObject:@1 forKey:@"id"];
    [stmp bindParameterDictionary:dic];
    id<PLResultSet> result=[stmp executeQuery];
    while ([result next]) {
        int pid=[result intForColumn:@"id"];
        NSString *name=[result stringForColumn:@"name"];
        int age=[result  intForColumn:@"age"];
        NSLog(@"name=%@,age=%zi,id=%zi",name,age,pid);
    }
}