尝试启动应用程序商店-获取“非结构或联合”错误中的“”。

我试图在不启动Safari和所有重定向的情况下启动应用程序商店,我得到一个关于“请求成员‘itunesurl’而不是结构或联合”的错误。

我对很多事情都不熟悉,所以谢谢你对我耐心。我觉得这和我叫“self.itunesurl”有关,因为它不认为itunesurl是当前课程的一部分,但我可能是错的。

在我(慢慢地)了解这一切的同时,提前感谢你的帮助。

sampleapdelegate.h.示例

-(void)launchStore:(NSURL *)iTunesURL;
-(void)connectionDidFinishLoading:(NSURLConnection *)connection;

sampleapdelegate.m示例

// Process a LinkShare/TradeDoubler/DGM URL to something iPhone can handle
- (void)launchStore:(NSURL *)iTunesURL {

NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:[NSURLRequest requestWithURL:iTunesURL] delegate:self startImmediately:YES];
[conn release];
}

// Save the most recent URL in case multiple redirects occur
// "iTunesURL" is an NSURL property in your class declaration
- (NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)response {
self.iTunesURL = [response URL];
return request;
}

// No more redirects; use the last URL saved
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[[UIApplication sharedApplication] openURL:self.iTunesURL];
}

我的视图控制器.h

#import "SampleAppDelegate.h"

而且我有 NSURL *iTunesURL; 在 @interface 花括号。

@property (nonatomic, retain) NSURL *iTunesURL;

- (IBAction) proButtonPressed: (id)sender;  // press to launch App Store

我的视图控制器.m

#import "MyViewController.h"

@implementation MyViewController

@synthesize iTunesURL;

- (IBAction) proButtonPressed: (id) sender {

NSURL *iTunesLink = [NSURL URLWithString:@"actual http URL goes here"];
SampleAppDelegate *appDelegate = (SampleAppDelegate *)[[UIApplication sharedApplication] delegate];

[appDelegate launchStore:iTunesLink];

}