[英]xcode Expected Selector for objective-c method and Missing @end errors
[英]PageView Controller errors 'Expected selector for Objective C'
创建网页浏览器控制器时遇到了很多麻烦。 我已经对我的代码进行了三次调整,但是我仍然收到以下错误:'目标C方法的预期选择器'。 我还收到另一条错误消息,提示缺少'@end'。 谁能告诉我为什么我收到这些消息? :l
#import "InstructionContentViewController.h"
#import "StorageViewController.h"
@interface StorageViewController ()
@end
@implementation StorageViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Create the data model
_pageTitles = @[@"Over 200 Tips and Tricks", @"Discover Hidden Features", @"Bookmark Favorite Tip", @"Free Regular Update"];
_pageImages = @[@"instructions1.png", @"instructions2.png", @"instructions3.png", @"instructions4.png"];
// Create page view controller
self.instructionViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"InstructionViewController"];
self.instructionViewController.dataSource = self;
InstructionContentViewController *startInstructViewController = [self viewControllerAtIndex:0];
NSArray *viewControllers = @[startInstructViewController];
[self.instructionViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
// Change the size of page view controller
self.instructionViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 50);
[self addChildViewController:_instructionViewController];
[self.view addSubview:_instructionViewController.view];
[self.instructionViewController didMoveToParentViewController:self];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)startWalkthrough:(id)sender {
InstructionContentViewController *startingInstructViewController = [self viewControllerAtIndex:0];
NSArray *viewControllers = @[startingInstructViewController];
[self.instructionViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionReverse animated:NO completion:nil];
}
#pragma mark - Page View Controller Data Source Methods:
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
NSUInteger index = ((InstructionContentViewController*) viewController).pageIndex;
if ((index == 0) || (index == NSNotFound)) {
return nil;
}
index--;
return [self viewControllerAtIndex:index];
}
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
NSUInteger index = ((InstructionContentViewController*) viewController).pageIndex;
if (index == NSNotFound) {
return nil;
}
index++;
if (index == [self.pageTitles count]) {
return nil;
}
return [self viewControllerAtIndex:index];
}
- (InstructionContentViewController *)viewControllerAtIndex:(NSUInteger)index
{
if (([self.pageTitles count] == 0) || (index >= [self.pageTitles count])) {
return nil;
}
// Create a new view controller and pass suitable data.
InstructionContentViewController *instructionContentViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"InstructionContentViewController"];
instructionContentViewController.instructimageFile = self.pageImages[index];
instructionContentViewController.instructtitleText = self.pageTitles[index];
instructionContentViewController.pageIndex = index;
return instructionContentViewController;
}
- (NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController
{
return [self.pageTitles count];
}
- (NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController
{
return 0;
}
@end
#import
文件之一(InstructionContentViewController.h或StorageViewController.h)中可能存在语法错误。
由于如何处理进口,警告有时会出现在意外的地方。 验证这些文件以及它们可能导入的其他任何文件的格式正确。
另外,在Xcode中,您可以单击“产品”菜单,并按住Option键以执行“清理构建文件夹”命令。 这将清除预编译的数据,并强制从头开始重新编译所有内容。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.