0
回答
升级到iOS5后ASIHttpRequest库问题及解决方法
滴滴云服务器,限时包月0.9元,为开发者而生>>>   

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 <ASIAutorotatingViewController:>

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
}


这样编译出来的程序能在ios5设备上正确运行,但是在ios5以下的设备则会crash。因为是库,所以要考虑到兼容不同版本,于是进一步修改为:

+ (void)dismiss
{
#if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_4_3
	if ([sharedDialog respondsToSelector:@selector(presentingViewController)]) 
	{
		UIViewController *theViewController = [sharedDialog presentingViewController];
		[theViewController dismissModalViewControllerAnimated:YES];
	}
	else
	{
		UIViewController *theViewController = [sharedDialog parentViewController];
		[theViewController dismissModalViewControllerAnimated:YES];
	}
#else
	UIViewController *theViewController = [sharedDialog parentViewController];
	[theViewController dismissModalViewControllerAnimated:YES];
#endif
}



还有上面那个Console的错误提示,解决方法是,在ASIAuthenticationDialog.m中找到-(void)show这个方法,并把最后一行代码

[[self presentingController] presentModalViewController:self animated:YES];

修改为:

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

这下就可以正常运行了哟, 我的问题也解决了。关于ASIHttpRequest的其它方面,到目前为止还没发现问题。







原文链接:http://blog.csdn.net/favormm/article/details/6893465
<无标签>
举报
长平狐
发帖于5年前 0回/96阅
顶部