自己建工具类

#import <Foundation/Foundation.h>
#import "Movie.h"
#import <UIKit/UIAlertView.h>

@interface SaveTool : NSObject

+(NSString *)documentModel:(id)model;   //找路径
+(void)saveMovie:(id)model
        delegate:(id<UIAlertViewDelegate>) delegate; // 保存

+(void)removeMovie:(id)model; // 删除
+(BOOL)haveModel:(id)model;   // 是否在档

@end<pre name="code" class="objc">#import "SaveTool.h"


@interface SaveTool()

@end

@implementation SaveTool

+(NSString *)documentModel:(id)model{

    NSString *className = [NSString stringWithFormat:@"%@", [model class]];
    NSString *document = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];
    // 拼接文件名
    NSString *filePath = [document stringByAppendingPathComponent:className];
    if (![NSKeyedUnarchiver unarchiveObjectWithFile:filePath]) {
        NSFileManager *manger = [NSFileManager defaultManager];
        [manger createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:nil];
    }
    NSString *doucumetPath = [filePath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.plist", className]];
    NSLog(@"%@", doucumetPath);
    return doucumetPath;
}

+(void)saveMovie:(id)model delegate:(id<UIAlertViewDelegate>)delegate{
    
    NSString *doucumetPath = [self documentModel:model];
    NSArray *arr = [NSKeyedUnarchiver unarchiveObjectWithFile:doucumetPath];
    
    UIAlertView *sucess = [[UIAlertView alloc] initWithTitle:@"成功" message:@"已经成了" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
    sucess.delegate = delegate;
    UIAlertView *warning = [[UIAlertView alloc] initWithTitle:@"失败" message:@"已收藏" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"移除", nil];
    warning.tag = 999;
    warning.delegate = delegate;
    
    if (!arr) {
        arr = @[model];
        [NSKeyedArchiver archiveRootObject:arr toFile:doucumetPath];
        [sucess show];
    }else {
        NSMutableArray *tempArr = [NSMutableArray arrayWithArray:arr];
        if ([self haveModel:model]) {
                [warning show];
        } else {
            [tempArr addObject:model];
            [NSKeyedArchiver archiveRootObject:tempArr toFile:doucumetPath];
            [sucess show];
        }

    }
}
#pragma mark 便利数组找到model在否,model的位置
typedef void(^ModelBlock)(id temp);

+(void)myblockArr:(NSArray *)arr
            model:(id)model
            blcok:(ModelBlock)tempBlock{
    ModelBlock block = Block_copy(tempBlock);
    for (id temp in arr) {
        NSString *tempId = [temp Id];
        NSString *modelId = [model Id];
//        NSString *modelId = [model performSelector:NSSelectorFromString(@"Id")];
        if ([tempId isEqualToString:modelId]) {
            block(temp);
            Block_release(block);
            return;
        }
    }
    Block_release(block);
}

+(void)removeMovie:(id)model{

    NSString *doucumetPath = [self documentModel:model];
    NSArray *arr = [NSKeyedUnarchiver unarchiveObjectWithFile:doucumetPath];

    [self myblockArr:arr model:model blcok:^(id temp) {
        NSMutableArray *movieArr = [NSMutableArray arrayWithArray:arr];
        [movieArr removeObject:temp];
        [NSKeyedArchiver archiveRootObject:movieArr toFile:doucumetPath];
    }];
    
}
+(BOOL)haveModel:(id)model{

    NSString *doucumetPath = [self documentModel:model];
    
    NSArray *arr = [NSKeyedUnarchiver unarchiveObjectWithFile:doucumetPath];
    __block BOOL haved = NO;
    [self myblockArr:arr model:model blcok:^(id temp) {
        haved = YES;
    }];
    return haved;
}

@end