自定義類似 App Store 的下載按鈕：DownloadButton

DownloadButton, 自定義類似 App Store 的下載按鈕。

Customizable designable components. Editing with IB.

Usage

To run the example project, clone the repo, and runpod installfrom the Example directory first. Check example project to see usage.

#import <DownloadButton/PKDownloadButton.h>

Usage for representing network operations:

#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;
        }
    }
}

#import "UIImage+PKDownloadButton.h"
#import "UIButton+PKDownloadButton.h"

[self.downloadButton.downloadedButton cleanDefaultAppearance];
[self.downloadButton.downloadedButton setBackgroundImage:[UIImage buttonBackgroundWithColor:[UIColor redColor]]
forState:UIControlStateNormal];
[self.downloadButton.downloadedButton setBackgroundImage:[UIImage highlitedButtonBackgroundWithColor:[UIColor redColor]]
forState:UIControlStateHighlighted];
[self.downloadButton.downloadedButton setTitle:@"delete" forState:UIControlStateNormal];
[self.downloadButton.downloadedButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[self.downloadButton.downloadedButton setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];

self.downloadButton.stopDownloadButton.tintColor = [UIColor blackColor];
self.downloadButton.stopDownloadButton.filledLineStyleOuter = YES;

self.downloadButton.pendingView.tintColor = [UIColor orangeColor];
self.downloadButton.pendingView.radius = 24.f;
self.downloadButton.pendingView.emptyLineRadians = 2.f;
self.downloadButton.pendingView.spinTime = 3.f;

[self.downloadButton.startDownloadButton cleanDefaultAppearance];
[self.downloadButton.startDownloadButton setImage:[UIImage imageNamed:@"download_default"] forState:UIControlStateNormal];

項目主頁：http://www.baiduhome.net/lib/view/home/1433388079166