NSDictionary在推送通知中返回空字符串

Question

这是我的有效载荷

{
    aps =     {
        ImageURL = "http://i.forbesimg.com/media/lists/people/cristiano-ronaldo_416x416.jpg";
        alert = testing;
    };
}

这是我的代码

NSDictionary *aps = [[NSDictionary alloc] initWithDictionary:[launchOptions objectForKey:@"aps"]];
NSString *text = [aps objectForKey:@"alert"];
NSString *imageUrl = [aps objectForKey:@"ImageURL"];

该代码在didReceivePushNotification中工作，但在didFinishLaunching 中不工作

Answer 1

该代码应该可以工作，尽管它过于复杂且效率低下。没有理由用launchOptions字典的内容创建一个新字典。

简单地说

NSString *text = ((NSDictionary*)launchOptions[@"aps"])[@"alert"];
NSString *imageURL = ((NSDictionary*)launchOptions[@"aps"])[@"ImageURL"];

或

NSDictionary *aps = (NSDictionary*)launchOptions[@"aps"];
NSString *text = aps[@"alert"];
NSString *imageURL = aps[@["ImageURL"];