iOS plist文件操作,写入/删除/修改

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。

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1.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); 

2.对plist文件内容进行/删除/修改/添加/写入操作

    //获取plist文件的路径
    NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *path1 = [pathArray objectAtIndex:0];
    NSString *myPath = [path1 stringByAppendingPathComponent:@"xiaoxi.plist"];

    //根据之前保存的容器类型读取数据
    //是数组就用数组来获取数据，是字典就用字典来获取数据
    //xiaoxi.plist文件
    //NSMutableArray *dataArr = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
    //xiaoxi.plist文件
    NSMutableDictionary *dataDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];

//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); 

3.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];    
 } 

仅供参考