小编Sar*_*ios的帖子

我一直在使用Parse SDK,我遵循了quickstep指南.当我尝试运行时,我得到了这8个错误.任何想法为什么？它看起来与Parse的Facebook部分有关,我没有使用它.

 Undefined symbols for architecture armv7:
"_FBTokenInformationTokenKey", referenced from:
  -[PFFacebookTokenCachingStrategy accessToken] in Parse(PFFacebookTokenCachingStrategy.o)
  -[PFFacebookTokenCachingStrategy setAccessToken:] in Parse(PFFacebookTokenCachingStrategy.o)
 "_FBTokenInformationExpirationDateKey", referenced from:
  -[PFFacebookTokenCachingStrategy cacheTokenInformation:] in     Parse(PFFacebookTokenCachingStrategy.o)
  -[PFFacebookTokenCachingStrategy expirationDate] in Parse(PFFacebookTokenCachingStrategy.o)
  -[PFFacebookTokenCachingStrategy setExpirationDate:] in Parse(PFFacebookTokenCachingStrategy.o)
 "_OBJC_METACLASS_$_FBSessionTokenCachingStrategy", referenced from:
  _OBJC_METACLASS_$_PFFacebookTokenCachingStrategy in Parse(PFFacebookTokenCachingStrategy.o)
"_OBJC_CLASS_$_FBSessionTokenCachingStrategy", referenced from:
  _OBJC_CLASS_$_PFFacebookTokenCachingStrategy in Parse(PFFacebookTokenCachingStrategy.o)
"_FBTokenInformationUserFBIDKey", referenced from:
  -[PFFacebookTokenCachingStrategy facebookId] in Parse(PFFacebookTokenCachingStrategy.o)
  -[PFFacebookTokenCachingStrategy setFacebookId:] in Parse(PFFacebookTokenCachingStrategy.o)
"_OBJC_CLASS_$_FBRequest", referenced from:
  objc-class-ref in Parse(PFFacebookAuthenticationProvider.o)
"_OBJC_CLASS_$_FBSession", referenced from:
  objc-class-ref in Parse(PFFacebookAuthenticationProvider.o)
 ld: symbol(s) not found for architecture armv7
 clang: error: linker command failed …

我正在使用单元格宽度为67的UICollectionView,现在我正在使用流布局.

我连续有3个细胞,细胞之间有30px的空间.如何减少距离,以便我可以连续安装四个细胞？这种方法与它有关吗？

 - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
 {
    return UIEdgeInsetsMake(10, 10, 10, 10);
 }

如何使用"3个对象在一个"中创建一个我想要的数组是这样的:

NSArray *array = [[NSArray alloc]initWithObjects:[UIImage , NSString , BOOL], [UIImage , NSString , BOOL], nil];

有没有办法做到这一点,以便索引处的每个对象都可以有一个图像,字符串和布尔值？

我尝试使用此代码将图像视图添加到UIView:

for (int i = 0; i <numberOfImages; i++) {
    UIImageView *image = [UIImageView alloc]initWithFrame:CGRectMake(40, 40, 40, 40)];
    image.image = [images objectAtIndex:i];
    [self.view addSubview:image];
}

这有效,但问题是我希望在添加每个图像之前有5秒的延迟,而是将它们全部添加到同一时间.有人可以帮帮我吗？谢谢.

例:

5 seconds = one image on screen
10 seconds = two images on screen
15 seconds = three images on screen