Version 1.0

CSColorizedProgressView is a progress view that transitions a grayscale image to a full color image. It looks like this:

Basic Usage

UIImage *image = [UIImage imageNamed:@"paris.png"]; // full-color image
CSColorizedProgressView *colorizedProgressView = [[[CSColorizedProgressView alloc] initWithImage:image] autorelease];
[self.view addSubview:colorizedProgressView];

[colorizedProgressView setProgress:0.75 animated:YES];

CSColorizedProgressView also supports a completion block for animations. This is especially useful for when the progress reaches 1.0, but your application UI shouldn't respond until the progress meter visually reaches completion.

colorizedProgressView.completionBlock = ^(CGFloat completedProgress) {
    if (completedProgress == 1.0) {
        NSLog(@"Progress completed!");
    }
};

Setup Instructions

1. Add CSColorizedProgressView.h & CSColorizedProgressView.m to your project.
2. If you're using ARC, you'll need to add the -fno-objc-arc compiler flag to CSColorizedProgressView.m.

MIT License

Copyright (c) 2013 Charles Scalesse.

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.