iOS中plist的创建，数据写入与读取
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iOS中plist的创建，数据写入与读取
功能创建一个test.plist文件，textInput作为输入，displayLabel作为显示，有一个按钮来触发保持程序triggerStorage；-(void)triggerStorage
{
displayLabel.text = textInput.text;
NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *path=[paths objectAtIndex:0];
NSString *filename=[path stringByAppendingPathComponent:@"test.plist"]; //获取路径
NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename]; //读取数据
NSLog(@"dic2 is:%@",dic2);
//创建一个dic，写到plist文件里
NSDictionary* dic = [NSDictionary dictionaryWithObjectsAndKeys:displayLabel.text,@"IP",nil]; //写入数据
[dic writeToFile:filename atomically:YES];
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
NSMutableArray *resultData;
NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *path=[paths objectAtIndex:0];
NSLog(@"path = %@",path);
NSString *filename=[path stringByAppendingPathComponent:@"test.plist"];
//读文件
NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename];
NSLog(@"dic is:%@",dic2);
if(dic2 == nil)
{
//1. 创建一个plist文件
NSFileManager* fm = [NSFileManager defaultManager];
[fm createFileAtPath:filename contents:nil attributes:nil];
}
else
{
resultData=[dic2 objectForKey:@"IP"];
if([dic2 count] > 0)
{
displayLabel.text = resultData;
}
else
{
displayLabel.text = @" ";
}
}
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] //按钮的初始化及触发条件设置
initWithTitle:@"保存"
style:UIBarButtonItemStylePlain
target:self
action:@selector(triggerStorage)] autorelease];
[super viewDidLoad];
}
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参考代码：
plist 文件读写
//1. 创建一个plist文件
NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); www.2cto.com
NSString *path=[paths objectAtIndex:0];
NSLog(@"path = %@",path);
NSString *filename=[path stringByAppendingPathComponent:@"test.plist"];
NSFileManager* fm = [NSFileManager defaultManager];
[fm createFileAtPath:filename contents:nil attributes:nil];
//NSDictionary* dic = [NSDictionary dictionaryWithContentsOfFile:plistPath];
//创建一个dic，写到plist文件里
NSDictionary* dic = [NSDictionary dictionaryWithObjectsAndKeys:@"sina",@"1",@"163",@"2",nil];
[dic writeToFile:filename atomically:YES];
//读文件
NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename];
NSLog(@"dic is:%@",dic2);
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