[UIImageView setImageWithURL:]: unrecognized selector sent to instance解决办法

Common Problems

Using dynamic image size with UITableViewCell

UITableView determins the size of the image by the first image set for a cell. If your remote images don't have the same size as your placeholder image, you may experience strange anamorphic scaling issue. The following article gives a way to workaround this issue:

http://www.wrichards.com/blog/2011/11/sdwebimage-fixed-width-cell-images/

Automatic Reference Counting (ARC)

You can use either style in your Cocoa project. SDWebImage Will figure out which you are using at compile time and do the right thing.

Installation

There are two ways to use this in your project: copy all the files into your project, or import the project as a static library.

Add the SDWebImage project to your project

Right-click on the project navigator and select "Add Files to "Your Project":

In the dialog, select SDWebImage.xcodeproj:

After you’ve added the subproject, it’ll appear below the main project in Xcode’s Navigator tree:

You may want to add the SDWebImage directory in your project source tree as a submodule before adding it to your project.

Add build target dependencies

In you application project app’s target settings, find the "Build Phases" section and open the "Target Dependencies" block:

Click the "+" button and select "SDWebImage ARC" (you may choose the non ARC target if you want to support iOS <3 or the ARC+MKAnnotation if you need MapKit category):

Open the "Link Binary With Libraries" block:

Click the "+" button and select "libSDWebImageARC.a" library (use non ARC version if you chose non ARC version in the previous step):

Click the "+" button again and select the "ImageIO.framework", this is needed by the progressive download feature:

If you chose to link against the ARC+MKAnnotation target, click the "+" button again and select "MapKit.framework":

Add headers

Open the "Build Settings" tab, in the "Linking" section, locate the "Other Linker Flags" setting and add the "-ObjC" flag:

In the "Search Paths" section, locate "Header Search Paths" (and not "User Header Search Paths") and add two settings:”$(TARGET_BUILD_DIR)/usr/local/lib/include” and ”$(OBJROOT)/UninstalledProducts/include”. Double click on the<Multiple values> to pop out the box and click on the "+" icon to add each of them. Make sure to include the quotes here:

Import headers in your source files

In the source files where you need to use the library, import the header file:

#import <SDWebImage/UIImageView+WebCache.h>

Build Project

At this point your workspace should build without error. If you are having problem, post to the Issue and the community can help you solve it.

Fixing indexing

If you have problem with auto-completion of SDWebImage methods, you may have to copy the header files in your project.

Future Enhancements

• LRU memory cache cleanup instead of reset on memory warning

转自：https://github.com/rs/SDWebImage#installation