GBKUIButtonProgressView

Inspired by Apple’s download progress buttons in the app store

Checkout the blog post.

Installation

Cocoapods

pod 'GBKUIButtonProgressView', git: 'https://github.com/Guidebook/gbkui-button-progress-view'

Manually add to your project

Just add the files in GBKUIButtonProgressView/ to your project

Usage

Create the button as a custom view in your xib, or create it programatically
Make sure that you don't have a constraint for it's width (it shrinks)--you might need to set the Intrinsic Content Size to "Placeholder" in your xib to avoid errors

self.downloadButton.initialTitle = @"Download";
self.downloadButton.completeTitle = @"Open";

// Add a target (like a regular button)
[self.downloadButton addTarget:self action:@selector(downloadButtonPressed:) forControlEvents:UIControlEventTouchUpInside];

-(void)downloadButtonPressed:(id)sender {
    // Update the button's state based on your downloading item's state
    if(!self.isDownloading && !self.isDownloaded) {
        [self.downloadButton startProgressing];
        [self downloadItem];
    } else if(self.isDownloaded) {
        [self openItem];
    } else {
        [self cancelDownloadingItem];
        [self.downloadButton setProgress:0 animated:YES withCompletion:^{
            [self.downloadButton reset];
        }];
    }
}

-(void)downloadProgressed:(CGFloat)progress {
  // Update the download button's progress when you get a progress update from your item
  [self.downloadButton setProgress:progress animated:YES];
}

To change the tint color, simply:

self.downloadButton.tintColor = [UIColor redColor];

See the example for more info.

Todos