Iphone文件处理——使用属性列表（plist）

先在Resources文件夹下新建一个Movies.plist文件，然后往里面添加一些内容。

然后在viewDidLoad方法里面添加如下内容，这样就可以做到如果Documents文件夹下有Movies文件那么就将其内容打印出来，如果没有就修改Resources文件下的Movies文件，然后将其复制到Documents文件夹下：

- (void)viewDidLoad //下面这两句获取Documents文件夹路径 NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDir = [path objectAtIndex:0]; //添加一个Movies.plist文件在Documents文件夹下 NSString *plistFileName = [documentsDir stringByAppendingPathComponent:@"Movies.plist"]; if ([[NSFileManager defaultManager]fileExistsAtPath:plistFileName]) {//如果这个文件存在，那么就将文件内容打印出来 NSDictionary *dict = [[NSDictionary alloc]initWithContentsOfFile:plistFileName]; for (NSString *category in dict) { NSLog(@"%@",category); NSArray *titles = [dict valueForKey:category]; for(NSString *title in titles){ NSLog(@"%@",title); } } [dict release]; } else{//如果文件不存在，就先修改Resources文件夹下的Movies.plist文件，在每一个array下添加以项，然后复制到Documents文件夹下 NSString *plisPath = [[NSBundle mainBundle] pathForResource:@"Movies" ofType:@"plist"]; NSDictionary *dict = [[NSDictionary alloc]initWithContentsOfFile:plisPath]; NSMutableDictionary *copyofdict = [dict mutableCopy]; NSArray *categoriesArray = [[copyofdict allKeys]sortedArrayUsingSelector:@selector(compare:)]; for(NSString *category in categoriesArray){ NSArray *title = [dict valueForKey:category]; NSMutableArray *mutabletitles = [title mutableCopy]; [mutabletitles addObject:@"helijun"]; [copyofdict setObject:mutabletitles forKey:category]; [mutabletitles release]; } NSString *fileName = [documentsDir stringByAppendingPathComponent:@"Movies.plist"]; [copyofdict writeToFile:fileName atomically:YES]; [dict release]; [copyofdict release]; } [super viewDidLoad]; }