CoreData 基本操作方法封装
为了方便使用CoreData 封装了几个扩展类，使用方法和类文件如下：
//首先需要在AppDelegate中的 application:didFinishLaunchingWithOptions:中调用：[CoreDataUtil launch];
//使用方法：model中有2个表User、Bank；其中User表中的RelationShip：user对应多条Bank记录
/* 清空User表 */
[NSManagedObject cleanTable:NSStringFromClass([User class])];
/* 像User表插入一条数据 */
NSDictionary *userDic = @{@"name":@"jizhi",@"age":@(23),@"bank":@[@{@"account":@"111111"},@{@"account":@"222222"}]};
User *user = (User *)[NSManagedObject addObject_sync:userDic toTable:NSStringFromClass([User class])];
NSLog(@"user ----> %@",user);
/* 修改刚刚插入的数据 */
userDic = @{@"name":@"jizhi",@"age":@(23),@"bank":@[@{@"account":@"444444"},@{@"account":@"555555"},@{@"account":@"666666"}]};
user = (User *)[NSManagedObject updateObject_sync:user params:userDic];
NSLog(@"user ----> %@",user);
/* 查询User表中的所有记录 */
NSArray *array = [NSManagedObject getTable_sync:NSStringFromClass([User class]) predicate:nil];
NSLog(@"array ----> %@",[array firstObject]);
NSManagedObject+Explain 为数据库的几个基本操作：增删改查 ，所有操作在同一个线程中进行；
所有的数据库操作都应调用 NSManagedObject+Explain 中的方法，一般不去改变这个扩展类;
如果还需要自定义方法，可以在 NSManagedObject+Magic 这个扩展类中添加。
3个类文件分别如下：
// CoreDataUtil.h
// // CoreDataUtil.h // CoreDataUtil // // Created by marujun on 14-1-13. // Copyright (c) 2014年 jizhi. All rights reserved. // #import <Foundation/Foundation.h> #import "NSManagedObject+Explain.h" #import "NSManagedObject+Magic.h" @interface CoreDataUtil : NSObject @property (strong, nonatomic) NSManagedObjectContext *managedObjectContext; @property (strong, nonatomic) NSManagedObjectModel *managedObjectModel; @property (strong, nonatomic) NSPersistentStoreCoordinator *persistentStoreCoordinator; + (void)launch; @end
// CoreDataUtil.m
//
// CoreDataUtil.m
// CoreDataUtil
//
// Created by marujun on 14-1-13.
// Copyright (c) 2014年 jizhi. All rights reserved.
//
#import "CoreDataUtil.h"
NSManagedObjectContext *globalManagedObjectContext_util;
NSManagedObjectModel *globalManagedObjectModel_util;
@implementation CoreDataUtil
@synthesize managedObjectContext_util = _managedObjectContext_util;
@synthesize managedObjectModel_util = _managedObjectModel_util;
@synthesize persistentStoreCoordinator_util = _persistentStoreCoordinator_util;
+ (void)launch
{
static dispatch_once_t pred = 0;
__strong static id coreDataUtil = nil;
dispatch_once(&pred, ^{
coreDataUtil = [[self alloc] init];
});
}
- (id)init
{
self = [super init];
if (self) {
//初始化模型
[NSManagedObject asyncQueue:false actions:^{
globalManagedObjectContext_util = [self managedObjectContext];
globalManagedObjectModel_util = [self managedObjectModel];
}];
}
return self;
}
#pragma mark - Core Data stack
// Returns the managed object context for the application.
- (NSManagedObjectContext *)managedObjectContext
{
if (_managedObjectContext_util != nil) {
return _managedObjectContext_util;
}
NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
if (coordinator != nil) {
_managedObjectContext_util = [[NSManagedObjectContext alloc] init];
[_managedObjectContext_util setPersistentStoreCoordinator:coordinator];
}
return _managedObjectContext_util;
}
// Returns the managed object model for the application.
- (NSManagedObjectModel *)managedObjectModel
{
if (_managedObjectModel_util != nil) {
return _managedObjectModel_util;
}
NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"models" withExtension:@"momd"];
_managedObjectModel_util = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
return _managedObjectModel_util;
}
// Returns the persistent store coordinator for the application.
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {
if (_persistentStoreCoordinator_util != nil) {
return _persistentStoreCoordinator_util;
}
NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"models.sqlite"];
NSError *error = nil;
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
[NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption,
//[NSNumber numberWithBool:YES], NSIgnorePersistentStoreVersioningOption,
nil];
_persistentStoreCoordinator_util = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
if (![_persistentStoreCoordinator_util addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:options error:&error]) {
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
// reset models data when core data change
[userDefaults removeObjectForKey:@"AllAuthData"];
[userDefaults synchronize];
[[NSFileManager defaultManager] removeItemAtURL:storeURL error:nil];
_persistentStoreCoordinator_util = nil;
return [self persistentStoreCoordinator];
}
return _persistentStoreCoordinator_util;
}
#pragma mark - Application's Documents directory
// Returns the URL to the application's Documents directory.
- (NSURL *)applicationDocumentsDirectory
{
return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}
@end
// NSManagedObject+Explain.h
// // NSManagedObject+Explain.h // CoreDataUtil // // Created by marujun on 14-1-13. // Copyright (c) 2014年 jizhi. All rights reserved. // #import <CoreData/CoreData.h> @interface NSManagedObject (Explain) //异步执行任务 + (void)addObject_async:(NSDictionary *)dictionary toTable:(NSString *)tableName complete:(void (^)(NSManagedObject *object))complete; + (void)addObjectsFromArray_async:(NSArray *)otherArray toTable:(NSString *)tableName complete:(void (^)(NSArray *resultArray))complete; + (void)deleteObjects_async:(NSArray *)manyObject complete:(void (^)(BOOL success))complete; + (void)updateTable_async:(NSString *)tableName predicate:(NSPredicate *)predicate params:(NSDictionary *)params complete:(void (^)(NSArray *resultArray))complete; + (void)updateObject_async:(NSManagedObject *)object params:(NSDictionary *)params complete:(void (^)(NSManagedObject *object))complete; + (void)getTable_async:(NSString *)tableName predicate:(NSPredicate *)predicate complete:(void (^)(NSArray *result))complete; + (void)getTable_async:(NSString *)tableName actions:(void (^)(NSFetchRequest *request))actions complete:(void (^)(NSArray *result))complete; + (void)getTable_async:(NSString *)tableName predicate:(NSPredicate *)predicate sortDescriptors:(NSArray *)sortDescriptors complete:(void (^)(NSArray *result))complete; //同步执行任务 + (NSManagedObject *)addObject_sync:(NSDictionary *)dictionary toTable:(NSString *)tableName; + (NSArray *)addObjectsFromArray_sync:(NSArray *)otherArray toTable:(NSString *)tableName; + (BOOL)deleteObjects_sync:(NSArray *)manyObject; + (NSArray *)updateTable_sync:(NSString *)tableName predicate:(NSPredicate *)predicate params:(NSDictionary *)params; + (NSManagedObject *)updateObject_sync:(NSManagedObject *)object params:(NSDictionary *)params; + (NSArray *)getTable_sync:(NSString *)tableName predicate:(NSPredicate *)predicate; + (NSArray *)getTable_sync:(NSString *)tableName actions:(void (^)(NSFetchRequest *request))actions; + (NSArray *)getTable_sync:(NSString *)tableName predicate:(NSPredicate *)predicate sortDescriptors:(NSArray *)sortDescriptors; //是否在异步队列中操作数据库 + (void)asyncQueue:(BOOL)async actions:(void (^)(void))actions; @end
// NSManagedObject+Explain.m
//
// NSManagedObject+Explain.m
// CoreDataUtil
//
// Created by marujun on 14-1-13.
// Copyright (c) 2014年 jizhi. All rights reserved.
//
#import "NSManagedObject+Explain.h"
#import "CoreDataUtil.h"
#define SuppressPerformSelectorLeakWarning(Stuff) \
do { \
_Pragma("clang diagnostic push") \
_Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
Stuff; \
_Pragma("clang diagnostic pop") \
} while (0)
static dispatch_queue_t myCustomQueue;
extern NSManagedObjectContext *globalManagedObjectContext_util;
extern NSManagedObjectModel *globalManagedObjectModel_util;
@implementation NSManagedObject (Explain)
//异步执行任务
+ (void)addObject_async:(NSDictionary *)dictionary toTable:(NSString *)tableName complete:(void (^)(NSManagedObject *object))complete
{
[self asyncQueue:true actions:^{
__block NSManagedObject *oneObject = [self addObject:dictionary toTable:tableName];
[self save:^(NSError *error) { error?oneObject=nil:nil; }];
if (complete) {
complete(oneObject);
}
}];
}
+ (void)addObjectsFromArray_async:(NSArray *)otherArray toTable:(NSString *)tableName complete:(void (^)(NSArray *resultArray))complete
{
[self asyncQueue:true actions:^{
__block NSArray *resultArray = [self addObjectsFromArray:otherArray toTable:tableName];
[self save:^(NSError *error) { error?resultArray=@[]:nil; }];
if (complete) {
complete(resultArray);
}
}];
}
+ (void)deleteObjects_async:(NSArray *)manyObject complete:(void (^)(BOOL success))complete
{
[self asyncQueue:true actions:^{
[self deleteObjects:manyObject];
__block BOOL success = true;
[self save:^(NSError *error) { error?success=false:true; }];
if (complete) {
complete(success);
}
}];
}
+ (void)updateTable_async:(NSString *)tableName predicate:(NSPredicate *)predicate params:(NSDictionary *)params complete:(void (^)(NSArray *resultArray))complete
{
[self asyncQueue:true actions:^{
__block NSArray *resultArray = [self updateTable:tableName predicate:predicate params:params];
[self save:^(NSError *error) { error?resultArray=@[]:nil; }];
if (complete) {
complete(resultArray);
}
}];
}
+ (void)updateObject_async:(NSManagedObject *)object params:(NSDictionary *)params complete:(void (^)(NSManagedObject *object))complete
{
[self asyncQueue:true actions:^{
__block NSManagedObject *oneObject = [self updateObject:object params:params];
[self save:^(NSError *error) { error?oneObject=nil:nil; }];
if (complete) {
complete(oneObject);
}
}];
}
+ (void)getTable_async:(NSString *)tableName predicate:(NSPredicate *)predicate complete:(void (^)(NSArray *result))complete
{
[self getTable_async:tableName predicate:predicate sortDescriptors:nil complete:complete];
}
+ (void)getTable_async:(NSString *)tableName actions:(void (^)(NSFetchRequest *request))actions complete:(void (^)(NSArray *result))complete
{
[self asyncQueue:true actions:^{
NSArray *resultArr = [self getTable:tableName predicate:nil sortDescriptors:nil actions:actions];
if (complete) {
complete(resultArr);
}
}];
}
+ (void)getTable_async:(NSString *)tableName predicate:(NSPredicate *)predicate sortDescriptors:(NSArray *)sortDescriptors complete:(void (^)(NSArray *result))complete
{
[self asyncQueue:true actions:^{
NSArray *resultArr = [self getTable:tableName predicate:predicate sortDescriptors:sortDescriptors actions:nil];
if (complete) {
complete(resultArr);
}
}];
}
//同步执行任务
+ (NSManagedObject *)addObject_sync:(NSDictionary *)dictionary toTable:(NSString *)tableName
{
__block NSManagedObject *oneObject = nil;
[self asyncQueue:false actions:^{
oneObject = [self addObject:dictionary toTable:tableName];
[self save:^(NSError *error) { error?oneObject=nil:nil; }];
}];
return oneObject;
}
+ (NSArray *)addObjectsFromArray_sync:(NSArray *)otherArray toTable:(NSString *)tableName
{
__block NSArray *resultArr = nil;
[self asyncQueue:false actions:^{
resultArr = [self addObjectsFromArray:otherArray toTable:tableName];
[self save:^(NSError *error) { error?resultArr=@[]:nil; }];
}];
return resultArr;
}
+ (BOOL)deleteObjects_sync:(NSArray *)manyObject
{
__block BOOL success = true;
[self asyncQueue:false actions:^{
[self deleteObjects:manyObject];
[self save:^(NSError *error) { error?success=false:true; }];
}];
return success;
}
+ (NSArray *)updateTable_sync:(NSString *)tableName predicate:(NSPredicate *)predicate params:(NSDictionary *)params
{
__block NSArray *resultArray = nil;
[self asyncQueue:false actions:^{
resultArray = [self updateTable:tableName predicate:predicate params:params];
[self save:^(NSError *error) { error?resultArray=@[]:nil; }];
}];
return resultArray;
}
+ (NSManagedObject *)updateObject_sync:(NSManagedObject *)object params:(NSDictionary *)params
{
__block NSManagedObject *oneObject = nil;
[self asyncQueue:false actions:^{
oneObject = [self updateObject:object params:params];
[self save:^(NSError *error) { error?oneObject=nil:nil; }];
}];
return oneObject;
}
+ (NSArray *)getTable_sync:(NSString *)tableName predicate:(NSPredicate *)predicate
{
return [self getTable_sync:tableName predicate:predicate sortDescriptors:nil];
}
+ (NSArray *)getTable_sync:(NSString *)tableName actions:(void (^)(NSFetchRequest *request))actions
{
__block NSArray *resultArr = nil;
[self asyncQueue:false actions:^{
resultArr = [self getTable:tableName predicate:nil sortDescriptors:nil actions:actions];
}];
return resultArr;
}
+ (NSArray *)getTable_sync:(NSString *)tableName predicate:(NSPredicate *)predicate sortDescriptors:(NSArray *)sortDescriptors
{
__block NSArray *resultArr = nil;
[self asyncQueue:false actions:^{
resultArr = [self getTable:tableName predicate:predicate sortDescriptors:sortDescriptors actions:nil];
}];
return resultArr;
}
//扩展方法
+ (NSString *)upHeadString:(NSString *)string
{
return [[[string substringToIndex:1] uppercaseString] stringByAppendingString:[string substringFromIndex:1]];
}
- (void)setContentDictionary:(NSDictionary *)dictionary
{
for (NSString *key in [dictionary allKeys])
{
id value = [dictionary objectForKey:key];
if ([value isKindOfClass:[NSString class]] || [value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSDate class]]){
@try {
[self setValue:value forKey:key];
}
@catch (NSException *exception) {
NSLog(@"解析基本类型出错了-->%@",exception);
}
}else if ([value isKindOfClass:[NSDictionary class]]){
@try {
NSEntityDescription *entityDescirp = [NSEntityDescription entityForName:NSStringFromClass([self class]) inManagedObjectContext:globalManagedObjectContext_util];
NSRelationshipDescription *relationshipDescrip = [entityDescirp.relationshipsByName objectForKey:key];
NSString *tableName = relationshipDescrip.destinationEntity.name;
NSManagedObject *object = [NSManagedObject addObject:value toTable:tableName];
[self setValue:object forKey:key];
}
@catch (NSException *exception) {
NSLog(@"解析字典出错了-->%@",exception);
}
}else if ([value isKindOfClass:[NSArray class]]){
@try {
for (NSDictionary *oneJsonObject in value)
{
NSEntityDescription *entiDescirp = [NSEntityDescription entityForName:NSStringFromClass([self class]) inManagedObjectContext:globalManagedObjectContext_util];
NSRelationshipDescription *relationshipDescrip = [entiDescirp.relationshipsByName objectForKey:key];
NSString *tableName = relationshipDescrip.destinationEntity.name;
NSManagedObject *object = [NSManagedObject addObject:oneJsonObject toTable:tableName];
SEL addSelector = NSSelectorFromString([NSString stringWithFormat:@"add%@Object:",[NSManagedObject upHeadString:key]]);
SuppressPerformSelectorLeakWarning([self performSelector:addSelector withObject:object]);
}
}
@catch (NSException *exception) {
NSLog(@"解析数组出错了-->%@",exception);
}
}
}
}
//在当前队列执行任务
+ (NSManagedObject *)addObject:(NSDictionary *)dictionary toTable:(NSString *)tableName
{
NSManagedObject *oneObject = nil;
Class class = NSClassFromString(tableName);
NSEntityDescription *entityDescrip = [[globalManagedObjectModel_util entitiesByName] objectForKey:tableName];
oneObject = [[class alloc] initWithEntity:entityDescrip insertIntoManagedObjectContext:globalManagedObjectContext_util];
[oneObject setContentDictionary:dictionary];
return oneObject;
}
+ (NSArray *)addObjectsFromArray:(NSArray *)otherArray toTable:(NSString *)tableName
{
NSMutableArray *resultArray = [[NSMutableArray alloc] init];
Class class = NSClassFromString(tableName);
NSEntityDescription *entityDescrip = [[globalManagedObjectModel_util entitiesByName] objectForKey:tableName];
for (NSDictionary *dictionary in otherArray)
{
NSManagedObject *oneObject = [[class alloc] initWithEntity:entityDescrip insertIntoManagedObjectContext:globalManagedObjectContext_util];
[oneObject setContentDictionary:dictionary];
[resultArray addObject:oneObject];
}
return [resultArray copy];
}
+ (NSArray *)updateTable:(NSString *)tableName predicate:(NSPredicate *)predicate params:(NSDictionary *)params
{
//查询数据
NSArray *queryArr = [self getTable:tableName predicate:predicate sortDescriptors:nil actions:nil];
//有匹配的记录时则更新记录
if(queryArr && queryArr.count){
for (NSManagedObject *object in queryArr.copy)
{
[self updateObject:object params:params];
}
} else //没有匹配的记录时添加记录
{
queryArr = @[[self addObject:params toTable:tableName]];
}
return queryArr;
}
+ (NSManagedObject *)updateObject:(NSManagedObject *)object params:(NSDictionary *)params
{
for (NSString *key in params.allKeys)
{
id value = [params objectForKey:key];
if ([value isKindOfClass:[NSString class]] || [value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSDate class]]){
@try {
[object setValue:value forKey:key];
}
@catch (NSException *exception) {
NSLog(@"key值出错了-->%@",exception);
}
}else if ([value isKindOfClass:[NSDictionary class]]){
@try {
NSManagedObject *otherObject = [object valueForKey:key];
if(otherObject){
[self updateObject:otherObject params:value];
}else{
NSEntityDescription *entityDescirp = [NSEntityDescription entityForName:NSStringFromClass([self class])
inManagedObjectContext:globalManagedObjectContext_util];
NSRelationshipDescription *relationshipDescrip = [entityDescirp.relationshipsByName objectForKey:key];
NSString *tableName = relationshipDescrip.destinationEntity.name;
otherObject = [NSManagedObject addObject:value toTable:tableName];
[object setValue:otherObject forKey:key];
}
}
@catch (NSException *exception) {
NSLog(@"解析字典出错了-->%@",exception);
}
}else if ([value isKindOfClass:[NSArray class]]){
@try {
NSArray *objectArray = [[object valueForKey:key] allObjects];
for (int index=0; index<[(NSArray *)value count]; index++)
{
NSDictionary *tempParams = [(NSArray *)value objectAtIndex:index];
if (objectArray && index<objectArray.count) {
[self updateObject:objectArray[index] params:tempParams];
}else{
NSEntityDescription *entiDescirp = [NSEntityDescription entityForName:NSStringFromClass([object class])
inManagedObjectContext:globalManagedObjectContext_util];
NSRelationshipDescription *relationshipDescrip = [entiDescirp.relationshipsByName objectForKey:key];
NSString *tableName = relationshipDescrip.destinationEntity.name;
NSManagedObject *tempObject = [self addObject:tempParams toTable:tableName];
SEL addSelector = NSSelectorFromString([NSString stringWithFormat:@"add%@Object:",[NSManagedObject upHeadString:key]]);
SuppressPerformSelectorLeakWarning([object performSelector:addSelector withObject:tempObject]);
}
}
}
@catch (NSException *exception) {
NSLog(@"解析数组出错了-->%@",exception);
}
}
}
return object;
}
+ (NSArray *)getTable:(NSString *)tableName predicate:(NSPredicate *)predicate sortDescriptors:(NSArray *)sortDescriptors actions:(void (^)(NSFetchRequest *request))actions
{
NSArray *resultArr = @[];
NSFetchRequest *request = [[NSFetchRequest alloc]init];
NSEntityDescription *description = [NSEntityDescription entityForName:tableName inManagedObjectContext:globalManagedObjectContext_util];
[request setEntity:description];
if (predicate) {
[request setPredicate:predicate];
}
if (sortDescriptors && sortDescriptors.count) {
[request setSortDescriptors:sortDescriptors];
}
actions?actions(request):nil;
@try {
@synchronized(globalManagedObjectContext_util) {
resultArr = [globalManagedObjectContext_util executeFetchRequest:request error:nil];
}
}
@catch (NSException *exception) {
NSLog(@"查询数据库出错了-->%@",exception);
}
return resultArr;
}
+ (void)save:(void (^)(NSError *error))complete
{
NSError *error;
@synchronized(globalManagedObjectContext_util) {
if (![globalManagedObjectContext_util save:&error]) {
// Update to handle the error appropriately.
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
}
}
}
+ (void)deleteObjects:(NSArray *)manyObject
{
@synchronized(globalManagedObjectContext_util) {
for (NSManagedObject *object in manyObject){
[globalManagedObjectContext_util deleteObject:object];
}
}
}
//是否在异步队列中操作数据库
+ (void)asyncQueue:(BOOL)async actions:(void (^)(void))actions
{
static int specificKey;
if (myCustomQueue == NULL)
{
myCustomQueue = dispatch_queue_create("com.jizhi.coredata", DISPATCH_QUEUE_SERIAL); //生成一个串行队列
CFStringRef specificValue = CFSTR("com.jizhi.coredata");
dispatch_queue_set_specific(myCustomQueue, &specificKey, (void*)specificValue,(dispatch_function_t)CFRelease);
}
NSString *retrievedValue = (NSString *)CFBridgingRelease(dispatch_get_specific(&specificKey));
if (retrievedValue && [retrievedValue isEqualToString:@"com.jizhi.coredata"]) {
actions ? actions() : nil;
}else{
if(async){
dispatch_async(myCustomQueue, ^{
actions ? actions() : nil;
});
}else{
dispatch_sync(myCustomQueue, ^{
actions ? actions() : nil;
});
}
}
}
@end
// NSManagedObject+Magic.h
// // NSManagedObject+Magic.h // CoreDataUtil // // Created by marujun on 14-1-13. // Copyright (c) 2014年 jizhi. All rights reserved. // #import <CoreData/CoreData.h> /*导入所有通过model生成的SubClass*/ #import "User.h" #import "Bank.h" @interface NSSet (TCNSManagedObjectMethods) // 排序下 - (NSArray *)sortObjects; @end @interface NSManagedObject (Magic) /*获取表中所有数据*/ + (NSArray *)getTable:(NSString *)tableName; /*清空表*/ + (void)cleanTable:(NSString *)tableName; @end
// NSManagedObject+Magic.m
//
// NSManagedObject+Magic.m
// CoreDataUtil
//
// Created by marujun on 14-1-13.
// Copyright (c) 2014年 jizhi. All rights reserved.
//
#import "NSManagedObject+Magic.h"
#import "CoreDataUtil.h"
@implementation NSSet (TCNSManagedObjectMethods)
- (NSArray *)sortObjects
{
return [[self allObjects] sortedArrayUsingComparator:^NSComparisonResult(NSManagedObject *obj1, NSManagedObject *obj2) {
if (obj1.index.intValue > obj2.index.intValue) {
return (NSComparisonResult)NSOrderedDescending;
}else if (obj1.index.intValue < obj2.index.intValue){
return NSOrderedAscending;
}
return NSOrderedSame;
}];
}
@end
extern NSManagedObjectContext *globalManagedObjectContext;
extern NSManagedObjectModel *globalManagedObjectModel;
@implementation NSManagedObject (Magic)
+ (NSArray *)getTable:(NSString *)tableName
{
NSArray *resultArr = [NSManagedObject getTable_sync:tableName predicate:nil];
return (resultArr && resultArr.count != 0)?resultArr:nil;
}
+ (void)cleanTable:(NSString *)tableName
{
NSArray *array = [self getTable_sync:tableName predicate:nil];
[self deleteObject_sync:array];
}
@end
GitHub 地址： https://github.com/marujun/DataManager