我正在尝试使用Parse和Facebook使一个项目工作。但是在运行该项目时,构建失败并出现了“Mach-O链接器错误”的提示。
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_SLComposeViewController", referenced from:
objc-class-ref in Parse(PF_Twitter.o)
"_OBJC_CLASS_$_SLRequest", referenced from:
objc-class-ref in Parse(PF_Twitter.o)
"_SLServiceTypeTwitter", referenced from:
-[PF_Twitter getAccessTokenForReverseAuthAsync:localTwitterAccount:] in Parse(PF_Twitter.o)
-[PF_Twitter getLocalTwitterAccountAsync] in Parse(PF_Twitter.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ViewController.h:
#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
@interface ViewController : UIViewController
@end
// Implement both delegates
@interface DefaultSettingsViewController :
UIViewController <PFLogInViewControllerDelegate, PFSignUpViewControllerDelegate>
@end
而 ViewController.m 文件:
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
// Sent to the delegate to determine whether the log in request should be submitted to the server.
- (BOOL)logInViewController:(PFLogInViewController *)logInController shouldBeginLogInWithUsername:(NSString *)username password:(NSString *)password {
// Check if both fields are completed
if (username && password && username.length != 0 && password.length != 0) {
return YES; // Begin login process
}
[[[UIAlertView alloc] initWithTitle:@"Missing Information"
message:@"Make sure you fill out all of the information!"
delegate:nil
cancelButtonTitle:@"ok"
otherButtonTitles:nil] show];
return NO; // Interrupt login process
}
// Sent to the delegate when a PFUser is logged in.
- (void)logInViewController:(PFLogInViewController *)logInController didLogInUser:(PFUser *)user {
[self dismissViewControllerAnimated:YES completion:NULL];
}
// Sent to the delegate when the log in attempt fails.
- (void)logInViewController:(PFLogInViewController *)logInController didFailToLogInWithError:(NSError *)error {
NSLog(@"Failed to log in...");
}
// Sent to the delegate when the log in screen is dismissed.
- (void)logInViewControllerDidCancelLogIn:(PFLogInViewController *)logInController {
[self.navigationController popViewControllerAnimated:YES];
}
// Sent to the delegate to determine whether the sign up request should be submitted to the server.
- (BOOL)signUpViewController:(PFSignUpViewController *)signUpController shouldBeginSignUp:(NSDictionary *)info {
BOOL informationComplete = YES;
// loop through all of the submitted data
for (id key in info) {
NSString *field = [info objectForKey:key];
if (!field || field.length == 0) { // check completion
informationComplete = NO;
break;
}
}
// Display an alert if a field wasn't completed
if (!informationComplete) {
[[[UIAlertView alloc] initWithTitle:@"Missing Information"
message:@"Make sure you fill out all of the information!"
delegate:nil
cancelButtonTitle:@"ok"
otherButtonTitles:nil] show];
}
return informationComplete;
}
// Sent to the delegate when a PFUser is signed up.
- (void)signUpViewController:(PFSignUpViewController *)signUpController didSignUpUser:(PFUser *)user {
[self dismissModalViewControllerAnimated:YES]; // Dismiss the PFSignUpViewController
}
// Sent to the delegate when the sign up attempt fails.
- (void)signUpViewController:(PFSignUpViewController *)signUpController didFailToSignUpWithError:(NSError *)error {
NSLog(@"Failed to sign up...");
}
// Sent to the delegate when the sign up screen is dismissed.
- (void)signUpViewControllerDidCancelSignUp:(PFSignUpViewController *)signUpController {
NSLog(@"User dismissed the signUpViewController");
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
if (![PFUser currentUser]) {
// Customize the Log In View Controller
PFLogInViewController *logInViewController = [[PFLogInViewController alloc] init];
[logInViewController setDelegate:self];
[logInViewController setFacebookPermissions:[NSArray arrayWithObjects:@"friends_about_me", nil]];
[logInViewController setFields: PFLogInFieldsFacebook | PFLogInFieldsDismissButton];
// Present Log In View Controller
[self presentViewController:logInViewController animated:YES completion:NULL];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
非常感谢任何帮助。