IOS Plist文件操作之写入/读取/删除
1.保存在user Document文件夹下,以读取文件,写入文件方式 2.在工程里手动创建一个.plist文件,把固定的内容写入,这个需要人工手动写入(工程里只可读取,不可以写入) 3.保存在user Document下,不过不需要读写文件,用系统的 NSUserDefaults 可以快速保存添加读取删除基本数据类型 这里记录的是第1种,第2种就是创建一个plist文件,然后自己手动写入数据,再用NSString path = [[NSBundle mainBundle] pathForResource:@"xiaoxi" ofType:@"plist"];获取到本地存储的数据。 写入数据到plist文件
pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString path = [pathArray objectAtIndex:0]; //获取文件的完整路径 NSString filePatch = [path stringByAppendingPathComponent:@"xiaoxi.plist"]; //上面3句可以写成这一句 // NSString filePatch = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"xiaoxi.plist"]; // NSLog(@"------filepath---%@",filePatch); / 下面是我的plist路径,在桌面空白处点击一下,前往-按住option-资源库-Developer-CoreSimulator-Devices......就按照下面路径找到plist所在的位置 /Users/baiteng01/Library/Developer/CoreSimulator/Devices/92444384-5241-4934-B078-1A7241F1B687/data/Containers/Data/Application/73005382-D1FB-4BC2-BB4E-1FBC64284141/Documents/xiaoxi.plist / //写入数据到plist文件 NSMutableDictionary dic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"小小虎",@"name",@"5",@"age",@"boy",@"sex",nil]; NSMutableDictionary dic2 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"小小兮",@"name",@"6",@"age",@"girl",@"sex",nil]; //将上面2个小字典保存到大字典里面 NSMutableDictionary dataDic = [NSMutableDictionary dictionary]; [dataDic setObject:dic1 forKey:@"一年级"]; [dataDic setObject:dic2 forKey:@"二年级"]; //写入plist里面 [dataDic writeToFile:filePatch atomically:YES]; //读取plist文件的内容 NSMutableDictionary dataDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:filePatch]; NSLog(@"---plist一开始保存时候的内容---%@",dataDictionary);</pre> </li> //获取路径对象 NSArray
对plist文件内容进行/删除/修改/添加/写入操作
//修改字典里面的内容,先按照结构取到你想修改内容的小字典 NSMutableDictionary *dd = [dataDictionary objectForKey:@"一年级"]; [dd setObject:@"我改名字了哦" forKey:@"name"]; [dd setObject:@"我添加的新内容" forKey:@"content"]; [dd removeObjectForKey:@"age"]; //修改成功以后,将这个小字典重新添加到大字典里面 [dataDictionary setObject:dd forKey:@"一年级"]; [dataDictionary writeToFile:filePatch atomically:YES]; NSLog(@"---plist做过操作之后的字典里面内容---%@",dataDictionary);
删除plist文件
//清除plist文件,可以根据我上面讲的方式进去本地查看plist文件是否被清除 NSFileManager *fileMger = [NSFileManager defaultManager]; NSString *xiaoXiPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"xiaoxi.plist"]; //如果文件路径存在的话 BOOL bRet = [fileMger fileExistsAtPath:xiaoXiPath]; if (bRet) { NSError *err; [fileMger removeItemAtPath:xiaoXiPath error:&err]; }