所有UIScrollView类型类的PullToRefresh扩展，具有动画文本绘制样式

示例

安装

手册
将名为PullToRefreshCoreText的文件夹中的文件复制到您的项目中。
导入“UIScrollView+PullToRefreshCoreText.h”

Cocoapods

    source 'https://github.com/CocoaPods/Specs.git'
    pod 'PullToRefreshCoreText', '~> 0.1'

使用

- (void)addPullToRefreshWithPullText:(NSString *)pullText
                       pullTextColor:(UIColor *)pullTextColor
                        pullTextFont:(UIFont *)pullTextFont
                      refreshingText:(NSString *)refreshingText
                 refreshingTextColor:(UIColor *)refreshingTextColor
                  refreshingTextFont:(UIFont *)refreshingTextFont
                              action:(pullToRefreshAction)action;

它有两个主要文本：下拉和刷新。
初始化函数具有创建这些文本的字符串、文本颜色和字体的参数。
最后一个参数是加载代码放置的块函数。

如果您想使用相同的文本或字体等，我还添加了一些其他的初始化方法。

   - (void)addPullToRefreshWithPullText:(NSString *)pullText
                                 action:(pullToRefreshAction)action;

   - (void)addPullToRefreshWithPullText:(NSString *)pullText
                         refreshingText:(NSString *)refreshingText
                                 action:(pullToRefreshAction)action;

   - (void)addPullToRefreshWithPullText:(NSString *)pullText
                                   font:(UIFont *)font
                                 action:(pullToRefreshAction)action;


   - (void)addPullToRefreshWithPullText:(NSString *)pullText
                         refreshingText:(NSString *)refreshingText
                                   font:(UIFont *)font
                                 action:(pullToRefreshAction)action;


   - (void)addPullToRefreshWithPullText:(NSString *)pullText
                          pullTextColor:(UIColor *)pullTextColor
                         refreshingText:(NSString *)refreshingText
                    refreshingTextColor:(UIColor *)refreshingTextColor
                                   font:(UIFont *)font
                                 action:(pullToRefreshAction)action;

实现

//Create ScrollView
self.scrollView = [[UIScrollView alloc] initWithFrame:self.view.frame];
[self.scrollView setContentSize:CGSizeMake(self.view.frame.size.width, self.scrollView.frame.size.height + 1)];
[self.view addSubview:self.scrollView];


//add pull to refresh
__weak typeof(self) weakSelf = self;
[self.scrollView addPullToRefreshWithPullText:@"Pull To Refresh" pullTextColor:[UIColor blackColor] pullTextFont:DefaultTextFont refreshingText:@"Refreshing" refreshingTextColor:[UIColor blueColor] refreshingTextFont:DefaultTextFont action:^{
    [weakSelf loadItems];
}];

最后一点：您应该在加载完成后调用[scrollView finishLoading]方法。
否则，您会一直处于刷新状态。

鸣谢

以下博客和代码我用它创建了这个
https://github.com/jrturton/NSString-Glyphs
https://codeproject.org.cn/Articles/109729/Low-level-text-rendering
http://ronnqvi.st/controlling-animation-timing/