iphone - 将文本框数据写入Plist

Question

我有一个带有提交按钮的文本框。我需要按一下提交时，文本框中的数据应该写在plist中。我尝试了以下代码，但plist中没有任何变化。我创建了一个名称为sample.plist的plist。

 -(void) SubmitAction {
NSString *path = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *finalPath = [path stringByAppendingPathComponent:@"sample.plist"];
NSMutableDictionary *plistDict = [NSMutableDictionary dictionaryWithContentsOfFile:finalPath];
NSMutableArray *titleArray=[plistDict valueForKey:@"title"];

[titleArray addObject:textbox1.text];

[plistDict setValue:titleArray forKey:@"title"];

[plistDict writeToFile:finalPath atomically:NO];
}

在plist中创建的数组如下

<plist version="1.0">
<dict>
<key>title</key> <array/>
 </dict>
</plist>

请告诉我我还需要做什么..我的错在哪里

Answer 1

您可以在我这边使用它

-(void)writeToPlist
{
BOOL success;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES); 
NSString *documentsDirectory = [documentPaths objectAtIndex:0];
NSString *documentPlistPath = [documentsDirectory stringByAppendingPathComponent:@"XYZ.plist"];

NSString *bundlePath = [[NSBundle mainBundle] bundlePath];  
NSString *bundlePlistPath = [bundlePath stringByAppendingPathComponent:@"XYZ.plist"];


if([fileManager fileExistsAtPath:documentPlistPath]){

    NSMutableDictionary *documentDict = [NSMutableDictionary 
    dictionaryWithContentsOfFile:documentPlistPath];
    NSMutableArray *valArray = [NSMutableArray arrayWithArray:[self readFromPlist]];
    int index = [valArray count];
    [valArray insertObject:@"lastObject" atIndex:index];
    [documentDict setObject:valArray forKey:@"title"];

    success =[documentDict writeToFile:documentPlistPath atomically:NO];

} else {

    NSError *error;
    BOOL written =  [fileManager copyItemAtPath:bundlePlistPath toPath:documentPlistPath 
    error:&error];

    if (written) {
        NSMutableDictionary *documentDict = [NSMutableDictionary 
        dictionaryWithContentsOfFile:documentPlistPath];
        NSMutableArray *valArray = [NSMutableArray arrayWithArray:[self readFromPlist]];
        int index = [valArray count];
        [valArray insertObject:@"lastObject" atIndex:index];
        [documentDict setObject:valArray forKey:@"title"];

        success =[documentDict writeToFile:documentPlistPath atomically:NO];

    }else {
        NSLog(@"Plist couldnot be copied from bundle to directory!!!");
    }

} 

}
 -(NSArray*)readFromPlist
 {
   NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
  NSUserDomainMask, YES); 
  NSString *documentsDirectory = [documentPaths objectAtIndex:0];
 NSString *documentPlistPath = [documentsDirectory stringByAppendingPathComponent:@"XYZ.plist"];

   NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:documentPlistPath];

   NSArray *valueArray = [dict objectForKey:@"title"];

   return valueArray;

 }

将@“lastobject”替换为textbox.text；将XYZ.plist替换为sample.plist。