iOS Plist文件操作之写入/读取/删除

写入数据到plist文件

//获取路径对象
NSArray *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);


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];
}