使用FMDB进行数据库操作

#import "ViewController.h"
#import "FMDB.h"

@interface ViewController ()
@property(nonatomic,strong) FMDatabase *db;

- (IBAction)insert:(UIButton *)sender;
- (IBAction)delete:(UIButton *)sender;
- (IBAction)update:(UIButton *)sender;
- (IBAction)select:(UIButton *)sender;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

//数据的路径，放在沙盒的cache下面
NSString *cacheDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
NSString *filePath = [cacheDir stringByAppendingPathComponent:@"contact.sqlite"];

//创建并且打开一个数据库
_db = [FMDatabase databaseWithPath:filePath];

BOOL flag = [_db open];
if (flag) {
NSLog(@"数据库打开成功");
}else{
NSLog(@"数据库打开失败");
}

//创建表
BOOL create =  [_db executeUpdate:@"create table if not exists t_health(id integer primary key  autoincrement, name text,phone text)"];

if (create) {
NSLog(@"创建表成功");
}else{
NSLog(@"创建表失败");
}

}

- (IBAction)insert:(UIButton *)sender {

BOOL insert = [_db executeUpdate:@"insert into t_health (name,phone) values(?,?)",@"jacob",@"138000000000"];
if (insert) {
NSLog(@"插入数据成功");
}else{
NSLog(@"插入数据失败");
}
}

- (IBAction)delete:(UIButton *)sender {
BOOL delete = [_db executeUpdate:@"delete from t_health where name like ?",@"jacob"];
if (delete) {
NSLog(@"删除数据成功");
}else{
NSLog(@"删除数据失败");
}
}

- (IBAction)update:(UIButton *)sender {
BOOL update = [_db executeUpdate:@"update t_health set name = ?  where phone = '%@'",@"jacob111"];
if (update) {
NSLog(@"更新数据成功");
}else{
NSLog(@"更新数据失败");
}

}

- (IBAction)select:(UIButton *)sender {
FMResultSet *set = [_db executeQuery:@"select * from t_health "];
while ([set next]) {
NSString *name =  [set stringForColumn:@"name"];
NSString *phone = [set stringForColumn:@"phone"];
NSLog(@"name : %@ phone: %@",name,phone);
}

}
@end