iOS CoreData

最新推荐文章于 2018-11-12 13:40:40 发布

iOS156Swift

最新推荐文章于 2018-11-12 13:40:40 发布

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分类专栏： Sqlite3/CoreData

本文链接：https://blog.youkuaiyun.com/u011715727/article/details/41651581

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本文介绍如何使用CoreData进行数据持久化，包括数据模型的定义、基本的增删查改操作及查询语句的构造。

1.coreData 的初始化

导入CoreData.framework 的框架

创建新文件：CoreData --->Data Model 、 NSManagedObject subclass 两个文件等

在新建的.xcdatamodeld 文件中添加所需要实体对象。可以参考其他初始化的文档。

2. coreData 代码

#import <Foundation/Foundation.h>

#import <CoreData/CoreData.h>

#import "UserInfo.h"

#define TABLENAME @"UserInfoEntity"

@interface CustomCoreDataManagement : NSObject

@property (nonatomic,strong) NSManagedObjectContext *managedObjectContext;

@property (nonatomic,strong) NSManagedObjectModel *managedObjectModel;

@property (nonatomic,strong) NSPersistentStoreCoordinator *persistentStoreCoordinator;

+ (CustomCoreDataManagement *)defaultManagment;

- (void)saveContext;

- (NSURL *)applicationDocumentsDirectory;

- (BOOL)insertCoreData:(UserInfo *)userInfoData ;

- (NSMutableArray *)searchDataSelectUserName:(NSString *)userName;

- (NSMutableArray *)searchDataSelectUserTel:(NSString *)userTel;

- (BOOL)deleteData:(NSString *)userId;

- (BOOL)updateData:(UserInfo *)_userInfoDict UserInfoId:(NSString *)userId;

- (NSMutableArray *)readAllUserInfo;

- (BOOL)clearUserInfoTable;

@end

// CustomCoreDataManagement.m

// DataSaveDemo

// Created by wing on 14/11/27.

#import "CustomCoreDataManagement.h"

#import "UserInfoEntity.h"

#import "UserInfo.h"

@implementation CustomCoreDataManagement

@synthesize managedObjectContext = _managedObjectContext;

@synthesize managedObjectModel = _managedObjectModel;

@synthesize persistentStoreCoordinator = _persistentStoreCoordinator;

static CustomCoreDataManagement *coreDataManagement = nil;

+(CustomCoreDataManagement *)defaultManagment {

@synchronized(self){

if (coreDataManagement == nil) {

coreDataManagement = [[CustomCoreDataManagement alloc] init];

}

return coreDataManagement;

}

- (void)saveContext {

NSError *error = nil;

NSManagedObjectContext *managedObjectContext = self.managedObjectContext;

if (managedObjectContext != nil) {

if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {

NSLog(@" %@ %@",error,[error userInfo]);

abort();

}

- (NSManagedObjectContext *)managedObjectContext{

if (_managedObjectContext) {

return _managedObjectContext;

}

NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];

if (coordinator != nil) {

_managedObjectContext = [[NSManagedObjectContext alloc] init];

[_managedObjectContext setPersistentStoreCoordinator:self.persistentStoreCoordinator];

}

return _managedObjectContext;

}

- (NSManagedObjectModel *)managedObjectModel {

if (_managedObjectModel) {

return _managedObjectModel;

}

NSURL *modelUrl = [[NSBundle mainBundle] URLForResource:@"CustomCoreDataModel" withExtension:@"momd"];

_managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelUrl];

return _managedObjectModel;

}

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {

if (_persistentStoreCoordinator) {

return _persistentStoreCoordinator;

}

NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"CustomCoreDataModel.sqlite"];

NSError *error = nil;

_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc]initWithManagedObjectModel:[self managedObjectModel]];

if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {

NSLog(@"unresolved error %@ %@",error,[error userInfo]);

abort();

}

return _persistentStoreCoordinator;

}

- (NSURL *)applicationDocumentsDirectory {

return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];

}

- (BOOL)insertCoreData:(UserInfo *)_userInfoData {

NSManagedObjectContext *context = [self managedObjectContext];

NSManagedObject *userInfo = [NSEntityDescription insertNewObjectForEntityForName:TABLENAME inManagedObjectContext:context];

[userInfo setValue:(_userInfoData.userName ? _userInfoData.userName : @" ") forKey:@"userName"];

[userInfo setValue:(_userInfoData.userTel ? _userInfoData.userTel : @" ") forKey:@"userTel"];

[userInfo setValue:(_userInfoData.userSex ? _userInfoData.userSex : @" ") forKey:@"userSex"];

[userInfo setValue:(_userInfoData.userAge ? _userInfoData.userAge : @" ") forKey:@"userAge"];

[userInfo setValue:(_userInfoData.userAddress ? _userInfoData.userAddress : @" ") forKey:@"userAddress"];

[userInfo setValue:(_userInfoData.userRemark ? _userInfoData.userRemark : @" ") forKey:@"userRemark"];

[userInfo setValue:(_userInfoData.userId ? _userInfoData.userId : @" ") forKey:@"userId"];

NSError *error ;

if (![ context save:&error]) {

NSLog(@" 不能保存 %@ ",[error localizedDescription]);

return NO;

}

return YES;

}

- (NSMutableArray *)searchDataSelectUserName:(NSString *)userName {

NSFetchRequest *request = [[NSFetchRequest alloc]initWithEntityName:TABLENAME];

request.predicate = [NSPredicate predicateWithFormat:@"userName CONTAINS[cd] %@",userName];

NSError *error = nil;

NSArray *dataResult = [self.managedObjectContext executeFetchRequest:request error:&error];

NSMutableArray *resultArray = [[NSMutableArray alloc] init];

for (NSManagedObject *info in dataResult) {

NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];

[dict setObject:[info valueForKey:@"userName"] forKey:@"userName"];

[dict setObject:[info valueForKey:@"userTel"] forKey:@"userTel"];

[dict setObject:[info valueForKey:@"userSex"] forKey:@"userSex"];

[dict setObject:[info valueForKey:@"userAge"] forKey:@"userAge"];

[dict setObject:[info valueForKey:@"userAddress"] forKey:@"userAddress"];

[dict setObject:[info valueForKey:@"userRemark"] forKey:@"userRemark"];

[dict setObject:[info valueForKey:@"userId"] forKey:@"userId"];

[resultArray addObject:dict];

[dict release];

dict = nil;

}

return resultArray;

}

- (NSMutableArray *)searchDataSelectUserTel:(NSString *)userTel {

NSFetchRequest *request = [[NSFetchRequest alloc]initWithEntityName:TABLENAME];

request.predicate = [NSPredicate predicateWithFormat:@"userTel CONTAINS[cd] %@",userTel];