Question

我一直在重写“dismissViewControllerAnimated：completion：”以在iOS4.3中使用此方法。但是，自从我更新Xcode（4.6.1）

以来，这种技术出现了运行时错误

error: address doesn't contain a section that points to a section in a object file

神秘地说，“presentViewController：animated：completion：”方法正在使用没有问题......

这是我使用的“UIViewController + Compatibility.h”。

@implementation UIViewController (Compatibility)

- (void)iOS4_presentViewController:(UIViewController *)viewControllerToPresent animated:(BOOL)flag completion:(void (^)(void))completion
{
    [self presentModalViewController:viewControllerToPresent animated:flag];
    [self performSelector:@selector(callBlock:) withObject:completion afterDelay:(flag ? 0.5 : 0)];
}

- (void)iOS4_dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion
{
    [self dismissModalViewControllerAnimated:flag];
    [self performSelector:@selector(callBlock:) withObject:completion afterDelay:(flag ? 0.5 : 0)];
}

- (void)callBlock:(void (^)(void))block
{
    if (block) {
        block();
    }
}

+ (void)iOS4compatibilize
{
    // presentViewController:animated:completion:
    Method m1 = class_getInstanceMethod(self.class, @selector(iOS4_presentViewController:animated:completion:));
    class_addMethod(self.class, 
                    @selector(presentViewController:animated:completion:), 
                    method_getImplementation(m1), 
                    method_getTypeEncoding(m1));

    // MEMO:
    // This cause a bug.
    // Method m2 = class_getClassMethod(self.class, @selector(iOS4_dismissViewControllerAnimated:completion:));
    // Here is the answer.

    // dismissViewControllerAnimated:completion:
    Method m2 = class_getInstanceMethod(self.class, @selector(iOS4_dismissViewControllerAnimated:completion:));
    class_addMethod(self.class,
                    @selector(dismissViewControllerAnimated:completion:),
                    method_getImplementation(m2), 
                    method_getTypeEncoding(m2));
}
@end

有人有同样的问题吗？

备忘：我已经尝试过这些东西了。

清理我预先编译的二进制文件。
重新启动Xcode，或重新启动我的Mac。
我的Xcode是最新版本（版本4.6.1）
我写了非常简短的示例代码（它只是呈现模态视图，并关闭），但我得到了相同的错误。

我不知道要解决这种情况......请帮忙

Answer 1

这是解决方案。（我使用了错误的功能）

+ (void)iOS4compatibilize
{
    // presentViewController:animated:completion:
    Method m1 = class_getInstanceMethod(self.class, @selector(iOS4_presentViewController:animated:completion:));
    class_addMethod(self.class, 
                    @selector(presentViewController:animated:completion:), 
                    method_getImplementation(m1), 
                    method_getTypeEncoding(m1));

    // dismissViewControllerAnimated:completion:
    Method m2 = class_getInstanceMethod(self.class, @selector(iOS4_dismissViewControllerAnimated:completion:));
    class_addMethod(self.class,
                    @selector(dismissViewControllerAnimated:completion:),
                    method_getImplementation(m2), 
                    method_getTypeEncoding(m2));
}

dismissViewControllerAnimated：completion：方法替换不适用于Xcode4.6.1

1 个答案: