plist的读取和写入（增删改）附demo 见文章结尾-优快云博客

代码见 http://download.youkuaiyun.com/detail/x1135768777/4197663

在.h文件内声明

NSMutableDictionary* dict;

UITextView* textView;

在.m文件内

// PlistViewController.m

// Plist read and write

// Created by wang doublejie on 12-3-31.

#import "PlistViewController.h"

@implementation PlistViewController

#define PATH [[NSBundle mainBundle] pathForResource:@"data" ofType:@"plist"]

@synthesize textView,dict;

-(void)viewDidLoad

{

[superviewDidLoad];

dict = [[NSMutableDictionaryalloc ]initWithContentsOfFile:PATH];//文件位置

NSMutableDictionary* item= [dictobjectForKey:@"item1"];//第一层 NSMutableDictionary

NSMutableDictionary* page= [itemobjectForKey:@"page1"];//第二层NSMutableDictionary

//plist里面想读取的值的上面有几个NSMutableDictionary就要几个NSMutableDictionary来解读

NSString *content = [page objectForKey:@"content"]; //内容

NSString *position = [page objectForKey:@"content_position"]; //文字位置

NSArray *arrPos =[positioncomponentsSeparatedByString:NSLocalizedString(@",",nil)];//位置数组拆分

textView=[[UITextViewalloc]initWithFrame:CGRectMake([[arrPosobjectAtIndex:0]floatValue], [[arrPosobjectAtIndex:1]floatValue], [[arrPosobjectAtIndex:2]floatValue], [[arrPosobjectAtIndex:3]floatValue])] ;

// [arrPos objectAtIndex:3]数组中第三个数值[[arrPos objectAtIndex:1] floatValue]是将读出的NSString转换成NSString;

textView.text=content;//将读出的内容赋值给text;

// textView.userInteractionEnabled = NO;取消文本复制

textView.editable=NO;

[self.viewaddSubview:textView];//添加视图上

NSString* item2= [dictobjectForKey:@"item1"];//读取item2

NSLog(@"%@",item2);

NSString* page_num= [item objectForKey:@"page_num"]; //读取page_num

NSLog(@"%@",page_num);

NSArray* arr=[dictobjectForKey:@"array"];

for(int i=0,j=2;i<=5;i++,j++)

{

//NSString* str=[[NSString alloc]initWithFormat:@"item%d",i];

NSString* item= [arr objectAtIndex:i];

textView=[[UITextViewalloc]initWithFrame:CGRectMake(90, 50*j, 70, 20)];

textView.text=item;

textView.editable=NO;

[self.viewaddSubview:textView];//添加视图上

}

for(int count=2;count<[dictcount];count++)//count是其保存的数目

{

NSString* str=[[NSStringalloc]initWithFormat:@"item%d",count];

NSString* item= [dictobjectForKey:str];

textView=[[UITextViewalloc]initWithFrame:CGRectMake(150, 50*count, 70, 20)];

textView.text=item;

textView.editable=NO;

[self.viewaddSubview:textView];//添加到视图上

}

UIButton *addbtn = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

addbtn.frame = CGRectMake(0, 60, 90, 35);

[addbtn setTitle:@"添加"forState:UIControlStateNormal];

[addbtn setTitle:@"添加"forState:UIControlStateHighlighted];

[addbtn addTarget:selfaction:@selector(add:)forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:addbtn];//添加到视图上

UIButton *editbtn = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

editbtn.frame = CGRectMake(0, 160, 90, 35);

[editbtn setTitle:@"修改"forState:UIControlStateNormal];

[editbtn setTitle:@"修改"forState:UIControlStateHighlighted];

[editbtn addTarget:selfaction:@selector(edit:)forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:editbtn];//添加到视图上

UIButton *delbtn = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

delbtn.frame = CGRectMake(0, 260, 90, 35);

[delbtn setTitle:@"删除"forState:UIControlStateNormal];

[delbtn setTitle:@"删除"forState:UIControlStateHighlighted];

[delbtn addTarget:selfaction:@selector(del:)forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:delbtn];//添加到视图上

}

-(IBAction)add:(id)sender

{

[dictsetObject:@"item8"forKey:@"item8"];//添加更修改方法相同，他是先查找是否存在该项，如果存在修改该项，如果不存在直接添加

[dict writeToFile:PATHatomically:YES]; //保存到plist里

[selfviewDidLoad];

}

-(IBAction)edit:(id)sender

{

[dict setObject:@"hello"forKey:@"item2"];//修改

[dict writeToFile:PATHatomically:YES];

[selfviewDidLoad];

}

- (IBAction)del:(id)sender

{

[dict removeObjectForKey:@"item5"];//删除

[dict writeToFile:PATHatomically:YES];

[selfviewDidLoad];

}

@end

代码见 http://download.youkuaiyun.com/detail/x1135768777/4197663