iOS plist 文件读写操作

plist文件一般保存在沙盒目录下，且存储类型比较单一（具体包含哪些可谷歌、度娘）,这里已plist读写字符串为例（真机、模拟器皆可用）

#pragma mark - plist 读取数据
-(NSArray *)historicalRecordReadTheData{
    NSString * filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject] stringByAppendingPathComponent:@"historicalRecord.plist"];
    NSMutableArray * historicalRecordArr = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
    return historicalRecordArr;
}

#pragma mark - plist 添加数据
-(void)historicalRecordAddData:(NSString *)string{
    NSString * filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject] stringByAppendingPathComponent:@"historicalRecord.plist"];
    NSMutableArray * historicalRecordArr = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
    if (!historicalRecordArr) {
        historicalRecordArr = [[NSMutableArray alloc]init];
    }
    if(![historicalRecordArr containsObject:string]){
        [historicalRecordArr addObject:string];
    }
    BOOL success = [historicalRecordArr writeToFile:filePath atomically:YES];
    if (success) {
        NSLog(@"写入成功");
    }else{
        NSLog(@"写入失败");
    }
}

#pragma mark - plist 删除所有数据
-(void)historicalRecordstring{
    NSString * filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject] stringByAppendingPathComponent:@"historicalRecord.plist"];
    NSMutableArray * historicalRecordArr = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
    [historicalRecordArr removeAllObjects];
    [historicalRecordArr writeToFile:filePath atomically:YES];
}