如何将数据从解析保存到NSArray iOS [英] How to save data from parse to a NSArray iOS

问题描述

如何以以下格式将数据从解析保存到NSArray.用于填充UITableView，用于搜索栏.

How can I save data from parse to an NSArray in the below format. which is being used to populate a UITableView, which is to be used for a search bar.

_candyArray = [NSArray arrayWithObjects:
                  [Candy candyOfCategory:@"chocolate" name:@"chocolate bar" mName:@"test1"],
                  [Candy candyOfCategory:@"chocolate" name:@"chocolate chip" mName:@"test1"],
                  [Candy candyOfCategory:@"chocolate" name:@"dark chocolate" mName:@"test1"],
                  [Candy candyOfCategory:@"hard" name:@"lollipop" mName:@"test1"],
                  [Candy candyOfCategory:@"hard" name:@"candy cane" mName:@"test1"],
                  [Candy candyOfCategory:@"hard" name:@"jaw breaker" mName:@"test1"],
                  [Candy candyOfCategory:@"other" name:@"caramel" mName:@"test1"],
                  [Candy candyOfCategory:@"other" name:@"sour chew" mName:@"test1"],
                  [Candy candyOfCategory:@"other" name:@"peanut butter cup" mName:@"test1"],
                  [Candy candyOfCategory:@"other" name:@"gummi bear" mName:@"test1"], nil];

我尝试了下面的代码，但是id没有加载任何数据，当我通过NSLog

I tried the below code, but id didn't load any data, keeps returning the value as null when I run it through NSLog

PFQuery *query = [PFQuery queryWithClassName:self.parseClassName];
[query orderByAscending:@"Name"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
    if (!error) {
        {
            self.arrayName = objects;
        }   
    }else {
        NSLog(@"Error, %@ %@",error,[error userInfo]);
    }
}];

NSLog(@"Array : %@", arrayName);

反正有没有将数据保存在上述类型的数组中?

Is there anyway to save the data in the above type of array?

推荐答案

为空的原因是

findObjectsInBackgroundWithBlock

尚未完成.如果要处理结果(或记录结果)，则需要将log语句放入块中，或者可以使用

is not finished when that log statement is run. If you want to handle the results (or log them), you need to put the log statement inside the block, or you can use

findObjectsInBackgroundWithTarget:selector:

相反，并在回调方法中包含处理代码.

instead, and have the handling code in your callback method.

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