Question

所以我找到了很多关于制作actionSheet的答案，但是没有多少人遵守ARC的规则。也许那是因为ARC刚刚发布？无论如何，我正在YouTube（http://www.youtube.com/watch?v=YlXQUQh7Sd4&list=SP53038489615793F7）上关注新的波士顿教程，我在教程中记下了代码，但它不起作用。我稍微调整了一下代码，试图符合ARC规则，但是我遇到了错误。

有人可以通过使用ARC制作actionSheet的正确示例来帮助我吗？

这是我的代码： .H

@interface ViewController : UIViewController <UIActionSheetDelegate>
@property IBOutlet UIButton *button;
-(IBAction) buttonPressed:(id)sender;
@end

的.m

-(IBAction) buttonPressed:(id)sender{

    UIActionSheet *actionSheet = [[UIActionSheet alloc]
                                  initWithTitle:@"Want to see an alert?"
                                  delegate:self
                                  cancelButtonTitle:@"Cancel"
                                  destructiveButtonTitle:@"Yea, lets see it"
                                  otherButtonTitles:Nil, nil];
    [actionSheet showInView:self.view];
}

-(void) actionSheet:(UIActionSheet *)actionSheet willDismissWithButtonIndex:(NSInteger)buttonIndex{

    if (buttonIndex != [actionSheet cancelButtonIndex]) {
        UIAlertView *alert = [[UIAlertView alloc]
                              initWithTitle:@"OK, here it is"
                              message:@"bacon is good umm"
                              delegate:nil
                              cancelButtonTitle:@"Done"
                              otherButtonTitles:nil];
        [alert show];
    }
}

这是我得到的错误：

2013-12-24 16:23:38.403 BaconUISwitch[4759:70b] -[ViewController buttonPressed]: unrecognized selector sent to instance 0x109238040
2013-12-24 16:23:38.407 BaconUISwitch[4759:70b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ViewController buttonPressed]: unrecognized selector sent to instance 0x109238040'
*** First throw call stack:
(
    0   CoreFoundation                      0x000000010188d795 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x00000001015f0991 objc_exception_throw + 43
    2   CoreFoundation                      0x000000010191ebad -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
    3   CoreFoundation                      0x000000010187f09d ___forwarding___ + 973
    4   CoreFoundation                      0x000000010187ec48 _CF_forwarding_prep_0 + 120
    5   UIKit                               0x0000000100254096 -[UIApplication sendAction:to:from:forEvent:] + 80
    6   UIKit                               0x0000000100254044 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 17
    7   UIKit                               0x0000000100328450 -[UIControl _sendActionsForEvents:withEvent:] + 203
    8   UIKit                               0x00000001003279c0 -[UIControl touchesEnded:withEvent:] + 530
    9   UIKit                               0x0000000100288c15 -[UIWindow _sendTouchesForEvent:] + 701
    10  UIKit                               0x0000000100289633 -[UIWindow sendEvent:] + 988
    11  UIKit                               0x0000000100262fa2 -[UIApplication sendEvent:] + 211
    12  UIKit                               0x0000000100250d7f _UIApplicationHandleEventQueue + 9549
    13  CoreFoundation                      0x000000010181cec1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    14  CoreFoundation                      0x000000010181c792 __CFRunLoopDoSources0 + 242
    15  CoreFoundation                      0x000000010183861f __CFRunLoopRun + 767
    16  CoreFoundation                      0x0000000101837f33 CFRunLoopRunSpecific + 467
    17  GraphicsServices                    0x00000001039943a0 GSEventRunModal + 161
    18  UIKit                               0x0000000100253043 UIApplicationMain + 1010
    19  BaconUISwitch                       0x0000000100001bb3 main + 115
    20  libdyld.dylib                       0x0000000101f1c5fd start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

如何使用ARC在iOS中制作actionSheet

0 个答案: