plist文件讀寫

[cpp]  - (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
     
    NSDictionary *dictionary1 = [NSDictionary dictionaryWithObjectsAndKeys:@"1",@"a",@"2",@"b", nil]; 
    NSDictionary *dictionary2 = [NSDictionary dictionaryWithObjectsAndKeys:@"3",@"c",@"4",@"d", nil]; 
     
    // 獲取應用程序沙盒的Documents目錄  
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); 
    NSString *plistPath = [paths objectAtIndex:0]; 
     
    // plist文件完整路徑  
    NSString *filename=[plistPath stringByAppendingPathComponent:@"test.plist"]; 
     
    // *寫入(原有數據被覆蓋)  
    [dictionary1 writeToFile:filename atomically:YES]; 
    [dictionary2 writeToFile:filename atomically:YES]; 
     
    // *讀取  
    NSDictionary *dic = [[NSMutableDictionary alloc] initWithContentsOfFile:filename]; 
    NSLog(@"%@", dic); 
} 

- (void)viewDidLoad
{
    [super viewDidLoad];
   
    NSDictionary *dictionary1 = [NSDictionary dictionaryWithObjectsAndKeys:@"1",@"a",@"2",@"b", nil];
    NSDictionary *dictionary2 = [NSDictionary dictionaryWithObjectsAndKeys:@"3",@"c",@"4",@"d", nil];
 
    // 獲取應用程序沙盒的Documents目錄
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    NSString *plistPath = [paths objectAtIndex:0];
   
    // plist文件完整路徑
    NSString *filename=[plistPath stringByAppendingPathComponent:@"test.plist"];
   
    // *寫入(原有數據被覆蓋)
    [dictionary1 writeToFile:filename atomically:YES];
    [dictionary2 writeToFile:filename atomically:YES];
   
    // *讀取
    NSDictionary *dic = [[NSMutableDictionary alloc] initWithContentsOfFile:filename];
    NSLog(@"%@", dic);
}

結論:重復對同一plist寫入數據，後一次寫入的數據將覆蓋前一次寫入的數據。