UIButton动作不起作用ios
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【中文标题】UIButton动作不起作用ios【英文标题】:UIButton action not working ios 【发布时间】:2015-09-23 03:09:43 【问题描述】:我将 xcode 6.2 更新为 7 并添加:
self.window.rootViewController = [UIViewController new];
在 AppDelegate.m 中
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
//add in there
self.window.rootViewController = [UIViewController new];
ViewController2 *viewController = [[ViewController2 alloc] init];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController];
navController.navigationBar.tintColor = [UIColor colorWithRed:0/255.0 green: 30.0/255.0 blue: 200.0/255.0 alpha:1];
[self.window addSubview:navController.view];
return YES;
但是现在
[button_Sinnup addTarget:self action:@selector(PLP) forControlEvents:UIControlEventTouchUpInside];
此代码在 ViewController2.m 中不起作用
- (void)viewDidLoad
[super viewDidLoad];
// Do any additional setup after loading the view.
[self.view setBackgroundColor:[UIColor blueColor]];
UIButton *button_Sinnup = [UIButton buttonWithType:UIButtonTypeCustom];
[button_Sinnup setTitle:@"" forState:UIControlStateNormal];
[button_Sinnup addTarget:self action:@selector(PLP) forControlEvents:UIControlEventTouchUpInside];
button_Sinnup.frame = CGRectMake(16, 76, 185, 45);
[button_Sinnup setBackgroundColor:[UIColor colorWithRed:224.0f/255.0f green:31.0f/255.0f blue:73.0f/255.0 alpha:0]];
[ button_Sinnup setBackgroundColor:[UIColor redColor]];
[self.view addSubview:button_Sinnup];
我无法调用方法 PLP
- (void)PLP
ViewController2* svc=[[ViewController2 alloc]init];
[self presentViewController:svc animated:YES completion:nil];
【问题讨论】:
【参考方案1】:你在添加导航控制器时出错了: 替换:
[self.window addSubview:navController.view];
与
self.window.rootViewController = navController;
【讨论】:
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