iOS 下载按钮：DownloadButton
jopen
9年前
DownloadButton 是可自定义的 App Store 风格的下载按钮。可自定义设计组件，用 IB 进行编辑。
使用示例：
#pragma mark - PKDownloadButtonDelegate - (void)downloadButtonTapped:(PKDownloadButton *)downloadButton currentState:(PKDownloadButtonState)state { switch (state) { case kPKDownloadButtonState_StartDownload: self.downloadButton.state = kPKDownloadButtonState_Pending; [self.pendingSimulator startDownload]; break; case kPKDownloadButtonState_Pending: [self.pendingSimulator cancelDownload]; self.downloadButton.state = kPKDownloadButtonState_StartDownload; break; case kPKDownloadButtonState_Downloading: [self.downloaderSimulator cancelDownload]; self.downloadButton.state = kPKDownloadButtonState_StartDownload; break; case kPKDownloadButtonState_Downloaded: self.downloadButton.state = kPKDownloadButtonState_StartDownload; self.imageView.hidden = YES; break; default: NSAssert(NO, @"unsupported state"); break; } } #pragma mark - DownloaderSimulatorDelegate - (void)simulator:(PKDownloaderSimulator *)simulator didUpdateProgress:(double)progress { if (simulator == self.pendingSimulator) { if (progress == 1.) { self.downloadButton.state = kPKDownloadButtonState_Downloading; [self.downloaderSimulator startDownload]; } } else if (simulator == self.downloaderSimulator) { self.downloadButton.stopDownloadButton.progress = progress; if (progress == 1) { self.downloadButton.state = kPKDownloadButtonState_Downloaded; self.imageView.hidden = NO; } } }