3G Eden
RSS由于正式版的iOS5出来了，所以我也试着去升级了。于是下载了最新的Xcode，才1.7G左右，比以往的安装包要小许多。
升级Xcode后，打开以前创建的工程， 运气好，一个错误都没有，程序也能正常跑起来。由于我程序中用了ASIHttpRequest这个库，让我发现了一个小问题，就是
ASIAuthenticationDialog这个内置对话框在网络有代理的情况下出现，然后无论点cancle或是login都不能dismiss。在4.3的SDK中完全没问题，在5.0的SDK中就会在Console中看到输出：
Unbalanced calls to begin/end appearance transitions for
很明显示在sdk5中， 用这个库有问题，还有在停止调式的时候，程序会有异常产生。
于是很明显示是SDK5的变化影响了ASIHttpRequest的正常使用。于是我要fix这个问题，经过我研究发现，dismiss不起作用是由于UIViewController的parentViewController不再返回正确值了，返回的是nil，而在SDK5中被presentingViewController取代了。于是在ASIAuthenticationDialog.m中找到+(void)dismiss这个方法并修改为：
- + (void)dismiss
- {
- #if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_4_3
- UIViewController *theViewController = [sharedDialog presentingViewController];
- [theViewController dismissModalViewControllerAnimated:YES];
- #else
- UIViewController *theViewController = [sharedDialog parentViewController];
- [theViewController dismissModalViewControllerAnimated:YES];
- #endif
- }
- [[self presentingController] presentModalViewController:self animated:YES];
- UIViewController *theController = [self presentingController];
- #if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_4_3
- SEL theSelector = NSSelectorFromString(@"presentModalViewController:animated:");
- NSInvocation *anInvocation = [NSInvocation invocationWithMethodSignature:[[theController class] instanceMethodSignatureForSelector:theSelector]];
- [anInvocation setSelector:theSelector];
- [anInvocation setTarget:theController];
- BOOL anim = YES;
- UIViewController *val = self;
- [anInvocation setArgument:&val atIndex:2];
- [anInvocation setArgument:&anim atIndex:3];
- [anInvocation performSelector:@selector(invoke) withObject:nil afterDelay:1];
- #else
- [theController presentModalViewController:self animated:YES];
- #endif
时间:2011-10-22 16:58
来源:LinuxIDC.com
作者:LinuxIDC.com
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