嗨，我目前正在试用 David mark 等人的 iOS 6 编程书籍，并且正在研究 Autorotation 和 Autosizing 部分。
如果 any1 可以帮助我解决这个不断弹出的烦人错误，我将不胜感激：
以下代码位于 .m 文件中：
#import "BIDViewController.h"
#define degreesToradians(x) (M_PI * (x) / 180.0)
@interface BIDViewController ()
@end
@implementation BIDViewController
- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration {
if (interfaceOrientation == UIInterfaceOrientationPortrait) {
self.view = self.portrait;
self.view.transform = CGAffineTransformIdentity;
self.view.transform =
CGAffineTransformMakeRotation(degreesToradians(0));
self.view.bounds = CGRectMake(0.0,0.0,320.0,460.0);
}
else if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
self.view = self.landscape;
self.view.transform = CGAffineTransformIdentity;
self.view.transform =
CGAffineTransformMakeRotation(degreesToradians(-90));
self.view.bounds = CGRectMake(0.0,0.0,480.0,300.0);
}
else if (interfaceOrientation ==
UIInterfaceOrientationLandscapeRight) {
self.view = self.landscape;
self.view.transform = CGAffineTransformIdentity;
self.view.transform =
CGAffineTransformMakeRotation(degreesToradians(90));
self.view.bounds = CGRectMake(0.0,0.0,480.0,300.0);
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)buttonPressed:(id)sender {
NSString *message = nil;
if ([self.foos containsObject:sender])
message = @"Foo Button Pressed";
else
message = @"Bar Button Pressed";
**UIAlertView *alert = [[UIAlertView alloc] initwithtitle:message**
message:nil
delegate:nil
cancelButtonTitle:@"Ok"
otherButtonTitles:nil];
[alert show];
}
@end
弹出的错误是“'UIAlertView'没有可见的@interface ...
我尝试查找有关“标题”的拼写错误，但错误仍然存在..这是针对 iOS 的！
有什么帮助吗？
谢谢