一，创建一个数据库
01.png
二：创建一个表，并设置字段及数据类型
02.png
三：封装后，最终使用的方法
//打开
let zyCore = ZYCoreData.shareInstance();
zyCore.openCoreData( resource: "ZYCoreDataTest");
let arr = ["a","fd","ed"];
let data = NSKeyedArchiver.archivedData(withRootObject: arr);
//删除
zyCore.removeData(entyName: "Test", predStr: "id>0");
//插入
zyCore.insertData(entyName: "Test", dic: ["id":1,"height":Float(183.2),"name":"beier","sex":1,"addr":data]);
//修改
zyCore.changeData(entyName: "Test", predStr: "id=1", dic: ["id":1,"height":Float(183.2),"name":"beier","sex":1,"addr":data]);
//查询
let squArr = zyCore.squaryData(entyName: "Test", predStr: "id>0");
for object in squArr!! {
let obj = object;
// let squResultdata = NSKeyedUnarchiver.unarchiveObject(with: obj.value(forKey: "addr") as! Data);
print(obj.value(forKey: "name"));
}
四：封装之打开数据库
创建单例，导入import CoreData
var _contenx : NSManagedObjectContext?;
class func shareInstance()->ZYCoreData{
let zycore = ZYCoreData();
return zycore;
}
/**打开数据库若数据库不存在，自动创建
-
entyName表名,resource数据库名字
*/func openCoreData(resource:String){ //拿到资源文件 let filePath = Bundle.main.url(forResource: resource, withExtension: "momd"); if filePath == nil{ return; } //读取数据模型 let model = NSManagedObjectModel.init(contentsOf: filePath!)!; //根据model初始化数据助理 let coordinator = NSPersistentStoreCoordinator.init(managedObjectModel: model); //将数据模型存储到沙盒路径下 let path = NSHomeDirectory().appending("/Documents/ZYCoreData.db") //准尉url类型的路径 let url = URL.init(fileURLWithPath: path); let store = try?coordinator.addPersistentStore(ofType: NSSQLiteStoreType, configurationName: "", at: url, options: nil); if store == nil { //数据库存储异常 print("数据存储异常"); } _contenx = NSManagedObjectContext.init(concurrencyType:NSManagedObjectContextConcurrencyType.privateQueueConcurrencyType); _contenx?.persistentStoreCoordinator = coordinator; }
五：封装之添加数据
func insertData(entyName:String,dic:NSDictionary) {
let object = NSEntityDescription.insertNewObject(forEntityName: entyName, into: _contenx!);
let keyArr = dic.allKeys;
for i in 0 ..< keyArr.count {
let key = keyArr[i];
let value = dic.object(forKey: key);
object.setValue(value, forKey: key as! String);
}
_contenx?.insert(object);
}
六：封装之删除数据
func removeData(entyName:String,predStr:String) {
//构建查询请求 NSFetchRequestResult
let request = NSFetchRequest<NSManagedObject>.init();
//设置查询请求，查询模型
request.entity = NSEntityDescription.entity(forEntityName: entyName, in: _contenx!);
//设置查询条件
let cate = NSPredicate.init(format: predStr);
request.predicate = cate;
//执行查询请求
let objectArr = try?_contenx?.fetch(request);
for object in objectArr!! {
_contenx?.delete(object);
}
}
七：封装之改变数据
func changeData(entyName:String,predStr:String,dic:NSDictionary) {
//构建查询请求 NSFetchRequestResult
let request = NSFetchRequest<NSManagedObject>.init();
//设置查询请求，查询模型
request.entity = NSEntityDescription.entity(forEntityName: entyName, in: _contenx!);
//设置查询条件
let cate = NSPredicate.init(format:predStr);
request.predicate = cate;
//执行查询请求
let objectArr = try?_contenx?.fetch(request);
for object in objectArr!! {
let keyArr = dic.allKeys;
for i in 0 ..< keyArr.count {
let key = keyArr[i];
let value = dic.object(forKey: key);
object.setValue(value, forKey: key as! String);
}
}
}
八：封装之查找数据
func squaryData(entyName:String,predStr:String) -> [NSManagedObject]??{
//构建查询请求 NSFetchRequestResult
let request = NSFetchRequest<NSManagedObject>.init();
//设置查询请求，查询模型
request.entity = NSEntityDescription.entity(forEntityName: entyName, in: _contenx!);
//设置查询条件
let cate = NSPredicate.init(format:predStr);
request.predicate = cate;
//执行查询请求
let objectArr = try?_contenx?.fetch(request);
return objectArr;
}
