iOS plist檔案的增删查改 原文：http://www.cnblogs.com/xiaofeixiang/p/4263498.html?utm_source=tuicool&utm_medium=referral

原文：http://www.cnblogs.com/xiaofeixiang/p/4263498.html?utm_source=tuicool&utm_medium=referral

plist第一次看到這個字尾名檔案的時候感覺怪怪的，不過接觸久了也就習以為常了,plist是Property List的簡稱可以了解成屬性清單檔案，主要用來存儲串行化後的對象的檔案。擴充名為.plist,是以被稱為 plist檔案,xCode中預設的是一種樹狀的結構展現出來資料，可視化的動态增删改查，非常人性化，不過最終的結果是以XML形式存儲的,Plist檔案可以用于存儲使用者的一些設定資訊，具體根據需求而定。

簡單建立檔案

簡單建立檔案就是說可以直接從xCode建立，右擊項目new File，可以添加一個plist檔案:

建立一個UserData.plist檔案，之後的内容如下:

右擊open as->source code，代碼如下:

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<?xml version= "1.0" encoding= "UTF-8" ?> <!DOCTYPE plist PUBLIC  "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd" > <plist version= "1.0" > <dict> <key>Login</key> <dict> <key>UserName</key> <string>FlyElephant</string> <key>UserPassWord</key> <string>123456</string> </dict> </dict> </plist>

　讀取設定的資訊:

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//讀取Property List檔案 NSString *userDataPath = [[ NSBundle mainBundle] pathForResource:@ "UserData" ofType:@ "plist" ]; NSMutableDictionary *data = [[ NSMutableDictionary alloc] initWithContentsOfFile:userDataPath]; NSLog (@ "%@" ,data); NSLog (@ "使用者名:%@ 密碼:%@" , data[@ "Login" ][@ "UserName" ],data[@ "Login" ][@ "UserPassWord" ]); [data setObject:@ "登入資訊" forKey:@ "Login" ];

增删改查

檔案添加，上面是應用程式中添加檔案，這個時候可以選擇代碼在沙盒中添加，代碼如下:

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NSArray *sandboxpath=  NSSearchPathForDirectoriesInDomains ( NSDocumentDirectory ,  NSUserDomainMask ,  YES ); //擷取完整路徑 NSString *documentsDirectory = [sandboxpath objectAtIndex:0]; NSString *plistPath = [documentsDirectory stringByAppendingPathComponent:@ "sandbox.plist" ]; //存儲根資料 NSMutableDictionary *rootDic = [[ NSMutableDictionary alloc ] init]; //字典中的詳細資料 NSMutableDictionary *userDataDic = [[ NSMutableDictionary alloc]init]; [userDataDic setObject:@ "Flephant" forKey:@ "UserName" ]; [userDataDic setObject:@ "http://www.cnblogs.com/xiaofeixiang/" forKey:@ "UserPassWord" ]; [rootDic setObject:userDataDic forKey:@ "Login" ]; //寫入檔案 [rootDic writeToFile:plistPath atomically: YES ]; NSLog (@ "%@" , NSHomeDirectory ()); NSLog (@ "寫入成功" );

 路徑如下，具體路徑擷取上一篇文章已經可以看到:

讀取資料:

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//擷取路徑 NSArray *sandboxpath=  NSSearchPathForDirectoriesInDomains ( NSDocumentDirectory ,  NSUserDomainMask ,  YES ); NSString *filePath = [[sandboxpath objectAtIndex:0] stringByAppendingPathComponent:@ "sandbox.plist" ]; NSLog (@ "%@" , NSHomeDirectory ()); //擷取資料 NSMutableDictionary *searchdata = [[ NSMutableDictionary alloc] initWithContentsOfFile:filePath]; NSLog (@ "%@" ,searchdata);

修改檔案:

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//擷取路徑 NSString *filepath = [[ NSSearchPathForDirectoriesInDomains ( NSDocumentDirectory ,  NSUserDomainMask ,  YES )objectAtIndex:0]stringByAppendingPathComponent:@ "sandbox.plist" ]; //所有的資料清單 NSMutableDictionary *datalist= [[[ NSMutableDictionary alloc]initWithContentsOfFile:filepath]mutableCopy]; //擷取Login節點 NSMutableDictionary *loginData = [datalist objectForKey:@ "Login" ]; [loginData setValue: @ "FlyElephant" forKey:@ "UserName" ]; [loginData setValue: @ "123456" forKey:@ "UserPassWord" ]; [datalist setValue:loginData forKey:@ "Login" ]; [datalist writeToFile:filepath atomically: YES ]; NSLog (@ "修改成功" );

　删除檔案:

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NSFileManager *manager=[ NSFileManager defaultManager]; //檔案路徑 NSString *filepath = [[ NSSearchPathForDirectoriesInDomains ( NSDocumentDirectory ,  NSUserDomainMask ,  YES )objectAtIndex:0]stringByAppendingPathComponent:@ "sandbox.plist" ]; if ([manager removeItemAtPath:filepath error: nil ]) { NSLog (@ "檔案删除成功" ); }