WTURLImageView

Introduction

WTURLImageView is a subclass of UIImageView that load images from Internet using AFNetworking, with the following features

• Auto resize image
• Show image in different aspect ratio
• Disk cache using GVCache
• Activity indicator
• Placeholder and failed image
• Various transition animations when image is loaded

Video Demo

Usage

Simplest call:

[imageView setURL:url];

Call with options:

[imageView setURL:url
		 fillType:fillType
		  options:options
placeholderImage:placeholderImage
     failedImage:failedImage
		   diskCacheTimeoutInternal:diskCacheTimeInterval];

where you can set different fillType:

• UIImageResizeFillTypeFillIn

• UIImageResizeFillTypeFitIn

• UIImageResizeFillTypeIgnoreAspectRatio

• UIImageResizeFillTypeNoResize

  The class will not rely on the contentMode to set the aspect ratio of the image. It will resize to the size of the imageView unless fillType==UIImageResizeFillTypeNoResize. It is because it is easier to do animation using layer. So you will find that if you set fillType to UIImageResizeFillTypeNoResize, most transiton animations will not run properly.

various options:

• WTURLImageViewOptionDontUseDiskCache: Disable disk cache
• WTURLImageViewOptionDontUseConnectionCache: Disable http cache
• WTURLImageViewOptionDontUseCache: Disable all cache
• WTURLImageViewOptionDontSaveDiskCache: Don't cache image
• WTURLImageViewOptionShowActivityIndicator: show activity indicator
• WTURLImageViewOptionAnimateEvenCache: by default, no animation when load from cache, set it to force animation in all case
• WTURLImageViewOptionDontClearImageBeforeLoading: by default, will clear old image when loading new image, keep the old image before new image is loaded.
• WTURLImageViewOptionsLoadDiskCacheInBackground: by default, cache is loaded in foreground. Set it if you assume loading image is very big that will take time to load from cache.
• WTURLImageViewOptionTransitionXXX: Various predefined transition when image is loaded.

It may be troublesome to set options every time, so you can use a helper class to preset settings:

WTURLImageViewPreset *preset = [][WTURLImageViewPreset alloc] init];
preset.placeholderImage = [UIImage imageNamed:@"placeholder"];

[imageView setURL: url preset:preset];

Or you can set the default settings:

WTURLImageViewPreset *preset = [WTURLImageViewPreset defaultPreset];
preset.placeholderImage = [UIImage imageNamed:@"placeholder"];

that all [WTURLImageView setURL:] will use the preset settings.

Check the sample code for details.

Run the sample code

git clone https://github.com/waterlou/WTURLImageView.git	
cd WTURLImageView	
pod install	
open WTURLImageViewDemo.xcworkspace

AFNetworking 1.x and 2.x

If you are using AFNetworking 1.x, please use 1.x version of the source. If you are using AFNetworking 2.x, please use 2.x version. Note that AFNetworking 2.x can only support iOS 6.0 or above.

License

These specifications and CocoaPods are available under the MIT license.