写入/追加数据到Plist返回nill

Question

我正在向alist写plist数据返回我的nill值..我必须将数据追加到前面的数组值。但是价值观alwys空.. 下面是代码：

NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES); 
// get documents path 
NSString *documentsPath = [paths objectAtIndex:0]; 
// get the path to our Data/plist file 
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"a.plist"]; 

// set the variables to the values in the text fields 


// create dictionary with values in UITextFields 
NSDictionary *plistDict = [NSDictionary dictionaryWithObject:@"c" forKey:@"Id"]; 


if ([[NSFileManager defaultManager] fileExistsAtPath:plistPath]) 
{ 
    array = [[NSMutableArray alloc] initWithContentsOfFile:plistPath]; 
    [array addObject:plistDict]; 

    [array writeToFile:plistPath atomically:YES]; 


      NSLog(@"array%@",array); 

} 
else 
{ 
    NSArray *array = [NSArray arrayWithObject:plistPath]; 
    [array writeToFile:plistPath atomically:YES]; 
} 

Answer 1

如果我正确理解你的问题，我测试只有一个变化不大即，新增数组声明的代码，它的正常工作。请原谅我，如果这不是问题。

NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES); 
    // get documents path 
    NSString *documentsPath = [paths objectAtIndex:0]; 
    // get the path to our Data/plist file 
    NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"a.plist"]; 

    // set the variables to the values in the text fields 
    NSMutableArray *array; 

    // create dictionary with values in UITextFields 
    NSDictionary *plistDict = [NSDictionary dictionaryWithObject:@"c" forKey:@"Id"]; 


    if ([[NSFileManager defaultManager] fileExistsAtPath:plistPath]) 
    { 
     array = [[NSMutableArray alloc] initWithContentsOfFile:plistPath]; 
     [array addObject:plistDict]; 

     [array writeToFile:plistPath atomically:YES]; 


     NSLog(@"array%@",array); 

    } 
    else 
    { 
     NSArray *array = [NSArray arrayWithObject:plistPath]; 
     [array writeToFile:plistPath atomically:YES]; 
    }