UITabBarController 不允许横向。所以我使用了 UITabBarContoller 的一个子类（称为 RotatingTabBarController）。它的唯一目的是通过向 shouldAutorotateToInterfaceOrientation 调用返回 YES 来允许旋转。
问题是，当您在模拟器中旋转 iPhone 时，会出现以下 malloc 错误。
malloc: *** error for object 0x3888000: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
我在 Snow Leopard 上使用 3.0 SDK 和 Xcode 3.2。我在 malloc_error_break 中设置了一个断点，但我无法将其追溯到我的代码。有什么办法可以让这个错误消失吗？
这是 RotatingTabBarController 类：
#import <UIKit/UIKit.h>
@interface RotatingTabBarController : UITabBarController {
}
@end
@implementation RotatingTabBarController
-(BOOL)shouldAutorotateToInterfaceOrientation:UIInterfaceOrientation)interfaceOrientation {
return YES;
}
@end
更新：
我对一个类别进行了同样的尝试。但它给出了相同的 malloc 错误。
// UITabBarController+Rotation.h
@interface UITabBarController (rotation)
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation;
@end
// UITabBarController+Rotation.m
#import "UITabBarController+Rotation.h"
@implementation UITabBarController (rotation)
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
@end
回溯
[Session started at 2009-09-05 12:13:19 -0400.]
Untitled(992,0xa06d9500) malloc: *** error for object 0x2024000: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Untitled(992,0xa06d9500) malloc: *** error for object 0x2014000: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
[Session started at 2009-09-05 12:13:27 -0400.]
GNU gdb 6.3.50-20050815 (Apple version gdb-1344) (Fri Jul 3 01:19:56 UTC 2009)
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This GDB was configured as "x86_64-apple-darwin".Attaching to process 992.
sharedlibrary apply-load-rules all
(gdb) bt
#0 0x951908fa in mach_msg_trap ()
#1 0x95191067 in mach_msg ()
#2 0x30244d62 in CFRunLoopRunSpecific ()
#3 0x30244628 in CFRunLoopRunInMode ()
#4 0x32044c31 in GSEventRunModal ()
#5 0x32044cf6 in GSEventRun ()
#6 0x309021ee in UIApplicationMain ()
#7 0x00002608 in main (argc=1, argv=0xbfffef94) at /Users/vishwas/Desktop/Untitled/main.m:13
(gdb)