Question

我正在尝试解析JSON文件，因此我可以将其内容用作NSStrings并在整个应用程序中显示在UILabels中。

我的JSON：

{
    "CustomText": [
        {
            "bodyText": "This is the body text",
            "loginText": "This is the loginText",
            "extraText": "This is the extra text"
        }
    ]
}

我的代码：

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"File" ofType:@"json"];

NSData *content = [[NSData alloc] initWithContentsOfFile:filePath];
NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:content options:kNilOptions error:nil];

NSArray *customStrings = json[@"CustomText"];
NSString *body = [customStrings valueForKey:@"bodyText"];
NSString *login = [customStrings valueForKey:@"loginText"];
self.labelText.text = body;

我不确定它为什么会中断，我看起来很惊讶并没有太多关于如何最好地使用本地JSON文件。任何帮助都会很棒。

错误讯息：

由于未捕获的异常而终止应用 'NSInvalidArgumentException'，原因：' - [__ NSArrayI length]：无法识别的选择器发送到实例0x7f8080781740'

Answer 1

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"File" ofType:@"json"];


NSData *content = [[NSData alloc] initWithContentsOfFile:filePath];
   NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:content options:kNilOptions error:nil];

NSArray *customStrings = json[@"CustomText"];
NSString *body = [[customStrings objectAtIndex:0] valueForKey:@"bodyText"];
NSString *login = [[customStrings objectAtIndex:0] valueForKey:@"loginText"];
self.labelText.text = body;

Answer 2

使用keypath

    NSString * body = [json valueForKeyPath:@"CustomText.bodyText"];
    self.labelText.text = body;

将本地json解析为UILabels

2 个答案: