我正在尝试使操作栏左上角的按钮工作，我可以让幻灯片工作但单击按钮调用相同的方法，但它继续只调用方法的else部分。 / p>
这是滑出抽屉的方法：
-(void)drawerAnimation {
NSLog(@"drawer animation called");
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:-5];
CGFloat new_x = 0;
if (menuDrawer.frame.origin.x < self.view.frame.origin.x ) {
NSLog(@"drawer animation called menu origin if");
new_x = menuDrawer.frame.origin.x + menuDrawerWidth;
} else {
NSLog(@"drawer animation called menu origin else");
new_x = menuDrawer.frame.origin.x - menuDrawerWidth;
}
menuDrawer.frame = CGRectMake(new_x, menuDrawer.frame.origin.y, menuDrawer.frame.size.width, menuDrawer.frame.size.height);
[UIView commitAnimations];
}
这是我添加按钮的方式，但我确实有一个三角形黄色警告标志
incompatible pointer to integer conversion UIBarButtonItemStyle
这是另一个.m文件中的按钮，其中抽屉动画位于父导航控制器中：
//add navigation top left bar items
UIBarButtonItem *menuBtn = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"menuButton.png"] style:self target:self action:@selector(drawerAnimation)];
//add items to array
NSArray *actionButtonItems = @[shareItem, cameraItem];
NSArray *leftActionButtonItems = @[menuBtn];
//add array to navigation bar
self.navigationItem.rightBarButtonItems = actionButtonItems;
self.navigationItem.leftBarButtonItems = leftActionButtonItems;
滑动菜单控制器代码的其余部分：
@interface SlidingMenuViewController ()
@end
@implementation SlidingMenuViewController
@synthesize menuDrawerWidth, menuDrawerX, recognizer_open, recognizer_close, mainTitle, menuItems;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
int statusBarHeight = [UIApplication sharedApplication].statusBarFrame.size.height;
menuDrawerWidth = self.view.frame.size.width * 0.75;
menuDrawerX = self.view.frame.origin.x - menuDrawerWidth;
menuDrawer = [[UIView alloc]initWithFrame:CGRectMake(menuDrawerX, self.view.frame.origin.y+statusBarHeight, menuDrawerWidth, self.view.frame.size.height-statusBarHeight)];
menuDrawer.backgroundColor = [UIColor redColor];
//initialize open and close
recognizer_close = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipes:)];
recognizer_open = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipes:)];
//for opening and closing drawer
recognizer_close.direction = UISwipeGestureRecognizerDirectionLeft;
recognizer_open.direction = UISwipeGestureRecognizerDirectionRight;
//add to view
[self.view addGestureRecognizer:recognizer_open];
[self.view addGestureRecognizer:recognizer_close];
//name title for menu and add to the drawer view
UILabel *menuTitle = [[UILabel alloc] initWithFrame:CGRectMake(60.0f, 5.0f, 200.0f, 50.0f)];
menuTitle.text = @"Menu Options";
[menuDrawer addSubview:menuTitle];
//scrollview to contain the buttons of the actions if more drawer items then what is on screen
UIScrollView *m_scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(3.0f, 65.0f, menuDrawerWidth, menuDrawer.frame.size.height)];
//set options for scrollview design
[m_scrollView setScrollEnabled:YES];
[m_scrollView setShowsHorizontalScrollIndicator:NO];
[m_scrollView setShowsVerticalScrollIndicator:YES];
[m_scrollView setBackgroundColor:[UIColor clearColor]];
[m_scrollView setIndicatorStyle:UIScrollViewIndicatorStyleDefault];
[m_scrollView setCanCancelContentTouches:NO];
[m_scrollView setClipsToBounds:YES];
//buttons measurement for each menu item
float originOfButtons = 10.0f;
float buttonWidth = 227.0f;
float buttonHeight = 50.0f;
int buttonSeparator = 10;
menuItems = [[NSArray alloc]initWithObjects:@"Home", @"Explore", @"Share", @"Profile", @"Settings", nil];
for(int b=0; b <[menuItems count];b++) {
UIButton *mybutton = [[UIButton alloc] initWithFrame:CGRectMake(3.0f, originOfButtons, buttonWidth, buttonHeight)];
mybutton.backgroundColor = [UIColor blueColor];
[mybutton setTag:b];
[mybutton setTitle:[menuItems objectAtIndex:b] forState:UIControlStateNormal];
[mybutton setSelected:false];
[mybutton addTarget:self action:@selector(menuSelect:) forControlEvents:UIControlEventTouchUpInside];
//add button to scrollview
[m_scrollView addSubview:mybutton];
//add extra button height and separator for each one
originOfButtons +=(buttonHeight + buttonSeparator);
}
//bounds of scrollview and add it to content size
[m_scrollView setContentSize:CGSizeMake([m_scrollView bounds].size.width, originOfButtons + 85)];
[menuDrawer addSubview:m_scrollView];
[self.view addSubview:menuDrawer];
}
-(void)viewDidAppear:(BOOL)animated {
// Get the stored data before the view loads
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
//if values exist then already logged in else take to login screen
if([[[defaults dictionaryRepresentation] allKeys] containsObject:@"userId"]){
NSLog(@"userId found");
} else {
NSLog(@"userId NOT found");
StarterViewController *hc=[[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"Starter"];
[self presentViewController:hc animated:YES completion:nil];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
-(void)createMenuButton {
[self drawerAnimation];
}
- (void)menuSelect:(id)sender {
NSString *selectedTitle = [menuItems objectAtIndex:[sender tag]];
UIButton *button = (UIButton*) sender;
mainTitle.text = selectedTitle;
switch (button.tag) {
case 0: {
NSLog(@"settings clicked");
if(![self.visibleViewController isKindOfClass:[SettingsViewController class]]) {
SlidingMenuViewController *viewController = [[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"MenuSettings"];
[self presentViewController:viewController animated:YES completion:nil];
}
break;
}
default:
break;
}
[self drawerAnimation];
}
-(void)handleSwipes:(UISwipeGestureRecognizer *)sender {
//calls the animation
[self drawerAnimation];
}
-(void)drawerAnimation {
NSLog(@"drawer animation called");
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:-5];
CGFloat new_x = 0;
if (menuDrawer.frame.origin.x < self.view.frame.origin.x ) {
NSLog(@"drawer animation called menu origin if");
new_x = menuDrawer.frame.origin.x + menuDrawerWidth;
} else {
NSLog(@"drawer animation called menu origin else");
new_x = menuDrawer.frame.origin.x - menuDrawerWidth;
}
menuDrawer.frame = CGRectMake(new_x, menuDrawer.frame.origin.y, menuDrawer.frame.size.width, menuDrawer.frame.size.height);
[UIView commitAnimations];
}
@end
错误更新
新代码:( drawerSlide是在.h之上添加的BOOL，并在滑动菜单控制器的.m文件中合成）
if（！self.drawerSlide）{ NSLog（@＆＃34;抽屉动画，称为菜单原点，如果＆＃34;）; new_x = menuDrawer.frame.origin.x + menuDrawerWidth; self.drawerSlide = YES; } else { NSLog（@＆＃34;抽屉动画，称为菜单原点＆＃34;）; new_x = menuDrawer.frame.origin.x - menuDrawerWidth; self.drawerSlide = NO; }
2014-05-17 22:31:25.882 Stand[8099:60b] -[ExploreTableViewController drawerAnimation]: unrecognized selector sent to instance 0xa47e4e0
2014-05-17 22:31:25.886 Stand[8099:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ExploreTableViewController drawerAnimation]: unrecognized selector sent to instance 0xa47e4e0'
*** First throw call stack:
(
0 CoreFoundation 0x01e311e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x01bb08e5 objc_exception_throw + 44
2 CoreFoundation 0x01ece243 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
3 CoreFoundation 0x01e2150b ___forwarding___ + 1019
4 CoreFoundation 0x01e210ee _CF_forwarding_prep_0 + 14
5 libobjc.A.dylib 0x01bc2880 -[NSObject performSelector:withObject:withObject:] + 77
6 UIKit 0x008723b9 -[UIApplication sendAction:to:from:forEvent:] + 108
7 UIKit 0x00b5f8df -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 139
8 libobjc.A.dylib 0x01bc2880 -[NSObject performSelector:withObject:withObject:] + 77
9 UIKit 0x008723b9 -[UIApplication sendAction:to:from:forEvent:] + 108
10 UIKit 0x00872345 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
11 UIKit 0x00973bd1 -[UIControl sendAction:to:forEvent:] + 66
12 UIKit 0x00973fc6 -[UIControl _sendActionsForEvents:withEvent:] + 577
13 UIKit 0x00973243 -[UIControl touchesEnded:withEvent:] + 641
14 UIKit 0x008b1ddd -[UIWindow _sendTouchesForEvent:] + 852
15 UIKit 0x008b29d1 -[UIWindow sendEvent:] + 1117
16 UIKit 0x008845f2 -[UIApplication sendEvent:] + 242
17 UIKit 0x0086e353 _UIApplicationHandleEventQueue + 11455
18 CoreFoundation 0x01dba77f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
19 CoreFoundation 0x01dba10b __CFRunLoopDoSources0 + 235
20 CoreFoundation 0x01dd71ae __CFRunLoopRun + 910
21 CoreFoundation 0x01dd69d3 CFRunLoopRunSpecific + 467
22 CoreFoundation 0x01dd67eb CFRunLoopRunInMode + 123
23 GraphicsServices 0x03bf05ee GSEventRunModal + 192
24 GraphicsServices 0x03bf042b GSEventRun + 104
25 UIKit 0x00870f9b UIApplicationMain + 1225
26 Stand 0x00017d0d main + 141
27 libdyld.dylib 0x0257d701 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
答案 0 :(得分：0)
所以，问题（本来可以更简洁地说明）是else分支永远不会在这里选择：
if (menuDrawer.frame.origin.x < self.view.frame.origin.x ) {
NSLog(@"drawer animation called menu origin if");
new_x = menuDrawer.frame.origin.x + menuDrawerWidth;
} else {
NSLog(@"drawer animation called menu origin else");
new_x = menuDrawer.frame.origin.x - menuDrawerWidth;
}
因此，必须是menuDrawer.frame.origin.x < self.view.frame.origin.x始终为真的情况。因此，如果那不是您所期望的，那么您正在测试错误的东西。
您需要使用更多日志记录（或断点并检查调试器中的变量）来查看这些值实际上是什么。然后你需要考虑为什么它们不是你所期望的。
一种可能性是您可能不应该将menuDrawer.frame与self.view.frame进行比较。如果（我假设）menuDrawer是self.view的子视图，那么比较应该是self.view.bounds，而不是self.view.frame。但是，如果没有进一步的信息，就无法确定。
另一个问题（这可能是实际原因）是您要比较menuDrawer和self.view的左边缘。您的代码中没有任何内容可以保证当幻灯片动画发生时，menuDrawer的左边缘将比self.view的左边缘更靠右边。如果即使只有一小部分menuDrawer仍在屏幕左侧，else将永远不会成立。如果是这样，你需要考虑更好的比较测试！你可能做的是比较，而不是self.view，而只是比较一些已知的整数值（可能是一个小的负数），其中menuDrawer.frame.origin.x 的值会改变哪个这个价值的一面是它的。然而，我会做什么只是在我们每次滑入或滑出时抛出BOOL实例变量，以便BOOL跟踪我们是否进入，然后我们可以进来如果我们在这里，那就出去了：
if (!self.in) {
NSLog(@"drawer animation called menu origin if");
new_x = menuDrawer.frame.origin.x + menuDrawerWidth;
self.in = YES;
} else {
NSLog(@"drawer animation called menu origin else");
new_x = menuDrawer.frame.origin.x - menuDrawerWidth;
self.in = NO;
}