NJKScrollFullScreen 0.2.6
- 作者
- ninjinkun
NJKScrollFullSreen
NJKScrollFullSreen 是一个类似 Facebook App 的全屏滚动库。
此仓库包含全屏代理和全屏 UI 行为模块。
-
NJKScrollFullSreen- 一个简单的 UIScrollViewDelegate 包装器。当需要全屏时，它调用代理方法。
-
UIViewController+NJKFullScreenSupport- 向 UIViewController 添加全屏行为。
这些模块是独立的。您可以在不使用 UIViewController+NJKFullScreenSupport 的情况下实现自己的自定义全屏行为。NJKScrollFullSreen 不仅适用于 UIScrollView，还适用于 UIWebView 和 UITableView。
要求
- iOS 5.0 或更高版本
- ARC
安装
使用方法
1. 实例化 NJKScrollFullScreen
在您的视图控制器上实例化并设置 UIScrollViewDelegate。如果您设置了 scrollViewDelegate，则 NJKScrollFullScreen 应作为代理对象执行。
- (void)viewDidLoad
{
[super viewDidLoad];
_scrollProxy = [[NJKScrollFullScreen alloc] initWithForwardTarget:self]; // UIScrollViewDelegate and UITableViewDelegate methods proxy to ViewController
self.tableView.delegate = (id)_scrollProxy; // cast for surpress incompatible warnings
_scrollProxy.delegate = self;
}2. 实现代理方法
- (void)scrollFullScreen:(NJKScrollFullScreen *)proxy scrollViewDidScrollUp:(CGFloat)deltaY
{
[self moveNavigationBar:deltaY animated:YES];
}
- (void)scrollFullScreen:(NJKScrollFullScreen *)proxy scrollViewDidScrollDown:(CGFloat)deltaY
{
[self moveNavigationBar:deltaY animated:YES];
}
- (void)scrollFullScreenScrollViewDidEndDraggingScrollUp:(NJKScrollFullScreen *)proxy
{
[self hideNavigationBar:YES];
}
- (void)scrollFullScreenScrollViewDidEndDraggingScrollDown:(NJKScrollFullScreen *)proxy
{
[self showNavigationBar:YES];
}3. 实现全屏行为
您可以选择 UIViewController+NJKFullScreenSupport 或您自己的视图管理代码。
使用 UIViewController+NJKFullScreenSupport.h。
#import "UIViewController+NJKFullScreenSupport.h"或者，您可以像下面一样实现自己的全屏行为。
- (void)showNavigationBar:(BOOL)animated
{
CGFloat statusBarHeight = [UIApplication sharedApplication].statusBarFrame.size.height;
[self setNavigationBarOriginY:statusBarHeight animated:animated];
}
- (void)hideNavigationBar:(BOOL)animated
{
[self setNavigationBarOriginY:0 animated:animated];
}
- (void)moveNavigationBar:(CGFloat)deltaY animated:(BOOL)animated
{
CGRect frame = self.navigationController.navigationBar.frame;
CGFloat nextY = frame.origin.y + deltaY;
[self setNavigationBarOriginY:nextY animated:animated];
}
- (void)setNavigationBarOriginY:(CGFloat)y animated:(BOOL)animated
{
CGFloat statusBarHeight = [UIApplication sharedApplication].statusBarFrame.size.height;
CGRect frame = self.navigationController.navigationBar.frame;
CGFloat navigationBarHeight = frame.size.height;
frame.origin.y = fmin(fmax(y, navigationBarHeight), statusBarHeight); // limit over moving
[UIView animateWithDuration:animated ? 0.1 : 0 animations:^{
self.navigationController.navigationBar.frame = frame;
}];
}