[英]UIButton not working inside UIScrollView
我有一个scrollview,其中我以编程方式创建按钮。 触摸时,按钮应该加载另一个笔尖。 问题是,在触摸时,我正在获取[ViewController buttonTest]:无法识别的选择器发送到实例
让我来看一下代码:
appdelegate.h
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) UINavigationController *viewController;
appdelegate.m
#import "ViewController.h"
@implementation AppDelegate
@synthesize window = _window;
@synthesize viewController = _viewController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
ViewController *view = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
self.viewController = [[UINavigationController alloc] initWithRootViewController:view];
self.window.rootViewController = self.viewController;
[application setStatusBarHidden:YES withAnimation:UIStatusBarAnimationNone];
[self.window makeKeyAndVisible];
return YES;
}
Viewcontroller.h
@class newView;
@interface ViewController : UIViewController{
UIScrollView * scrollView;
IBOutlet UIButton *btn;
}
- (IBAction)butttonTest:(id)sender;
@property (strong, nonatomic) newView *secondView;
最后是ViewController.m
- (void)loadView {
CGRect fullScreenRect=[[UIScreen mainScreen] applicationFrame];
scrollView=[[UIScrollView alloc] initWithFrame:fullScreenRect];
scrollView.contentSize=CGSizeMake(320,960);
UIImageView *tempImageView2 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image.jpeg"]];
UIImage * buttonImage = [UIImage imageNamed:@"contentlist_active.png"];
self.view=scrollView;
[scrollView addSubview:tempImageView2];
scrollView.userInteractionEnabled = YES;
btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(22, 100, 277, 32);
[btn setBackgroundImage:buttonImage forState:UIControlStateNormal];
[btn setTitle:@"hello world" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[btn addTarget:self action:@selector(buttonTest:) forControlEvents:UIControlEventTouchUpInside];
[scrollView addSubview:btn];
}
要加载视图,我有代码:
[btn addTarget:self action:@selector(buttonTest) forControlEvents:UIControlEventTouchUpInside];
我究竟做错了什么?
哦,是的,这是buttenPressed的方法
- (IBAction)butttonTest:(id)sender {
self.secondView = [[newView alloc] initWithNibName:@"newView" bundle:nil];
[self.navigationController pushViewController:self.secondView animated:YES];
}
您的方法称为- (IBAction)butttonTest:(id)sender
。 三个t
和一个参数。
但是您的选择器是@selector(buttonTest)
。 两t
,无参数。
这两个方法签名不匹配。
更改addTarget:action:forControlEvents:
调用:
[btn addTarget:self action:@selector(butttonTest:) forControlEvents:UIControlEventTouchUpInside];
或删除两者的第三个t。
您是否实现了buttonTest:方法(因为我在上面的代码中没有看到它)?
尝试这个:
[btn addTarget:self action:@selector(buttonTest:) forControlEvents:UIControlEventTouchUpInside];
注意buttonTest:
而不是buttonTest
。
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