plist文件操作总结

plist文件类 (负责文件的读写，删除整个文件)

#import "Plist.h"

@implementation Plist

- (void)writePlist:(NSMutableDictionary*)dictionary

{

NSArray *array =
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDirectory, YES);

NSString *docPath = [[array
objectAtIndex:0]
stringByAppendingPathComponent:PLISTNAME];

[dictionary
writeToFile:docPath atomically:YES];

[array
release];

}

- (void)readPlist:(NSMutableDictionary**)dictionary

{

NSArray *array =
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDirectory, YES);

NSString *docPath = [[array
objectAtIndex:0]stringByAppendingPathComponent:PLISTNAME];

*dictionary = [[NSMutableDictionary
alloc] initWithContentsOfFile:docPath];

}

- (void)deletePlist

{

NSFileManager *fileManager = [NSFileManager
defaultManager];

NSArray *array =
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDirectory, YES);

NSString *docPath = [[array
objectAtIndex:0]
stringByAppendingPathComponent:PLISTNAME];

[fileManager
removeItemAtPath:docPath error:nil];

}

@end

- (void)viewDidLoad

{

[super
viewDidLoad];

//文件读写

NSMutableDictionary *dictionary = [[NSMutableDictionary
alloc]
init];

NSMutableDictionary *dictionary2 = [[NSMutableDictionary
alloc]
init];

NSMutableArray *array = [[NSMutableArray
alloc]
init];

NSMutableDictionary *dictionary1 = [[NSMutableDictionary
alloc]
init];

[dictionary1
setValue:@"001"
forKey:@"harewareID"];

[array
addObject:dictionary1];

[dictionary
setValue:array forKey:@"CPU"];

self.plist = [[Plist
alloc] init];

//调用写文件

[self.plist
writePlist:dictionary];

//读文件

[self.plist
readPlist:&dictionary2];

NSMutableArray *array1 = [[NSMutableArray
alloc]
init];

array1 = [dictionary2
objectForKey:@"CPU"];

NSString *str = [[array1 objectAtIndex:0]
objectForKey:@"harewareID"];

NSLog(@"%@",str);

//文件删除

[self.plist
deletePlist];

NSMutableDictionary *dictionary3 = [[NSMutableDictionary
alloc]
init];

[self.plist
readPlist:&dictionary3];

NSMutableArray *array2 = [[NSMutableArray
alloc]
init];

array2 = [dictionary3
objectForKey:@"CPU"];

NSString *str2 = [[array2 objectAtIndex:0]
objectForKey:@"harewareID"];

NSLog(@"%@",str2);

//文件内容更改，更改一条数据就是把dictionary内key重写。这里重新插入harewareID

NSMutableDictionary *dictionary6 = [[NSMutableDictionary
alloc]
init];

NSMutableDictionary *dictionary5 = [[NSMutableDictionary
alloc]
init];

NSMutableArray *array5 = [[NSMutableArray
alloc]
init];

NSMutableDictionary *dictionary7 = [[NSMutableDictionary
alloc]
init];

[dictionary7
setValue:@"002"
forKey:@"harewareID"];

[array5
addObject:dictionary7];

[dictionary6
setValue:array5 forKey:@"CPU"];

[self.plist
writePlist:dictionary6];

[self.plist
readPlist:&dictionary5];

NSMutableArray *array4 = [[NSMutableArray
alloc]
init];

array4 = [dictionary5
objectForKey:@"CPU"];

NSString *str4 = [[array4 objectAtIndex:0]
objectForKey:@"harewareID"];

NSLog(@"%@",str4);

｝