Question

我试图启动App Store而不启动带有所有重定向的Safari，我收到的错误是“请求成员'iTunesURL'，而不是结构或联合。”

我是很多新手，所以感谢你对我有耐心。我认为它与我调用“self.iTunesURL”有关，因为它不认为iTunesURL是当前类的一部分，但我可能是非常错误的。

在我（慢慢）学习所有这些的同时，提前感谢您的帮助。

SampleAppDelegate.h

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

SampleAppDelegate.m

// 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];
}

MyViewController.h

#import "SampleAppDelegate.h"

我在NSURL *iTunesURL; curley braces中有@interface。

@property (nonatomic, retain) NSURL *iTunesURL;

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

MyViewController.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];

}

Answer 1

iTunesURL是ViewController类的属性，您只能在该类的方法中使用self引用。导入ViewController.h类不会使SampleAppDelegate类能够调用ViewController类的属性，除非它是ViewController的子类。

您需要在SampleAppDelegate中创建新的另一个属性，并将ViewController.iTunesURL的值分配给该属性。

试图启动App Store - 获取“不是结构或联合”的错误

1 个答案: