A solution to resolve a namespace collision between UIImageView categories in SDWebImage and AFNetworking

UIImageView+HTUIImageCategoryNamespaceConflictResolver.h

//
//  UIImageView+HTUIImageCategoryNamespaceConflictResolver.h
//  HotelTonight
//
//  Created by Jonathan Sibley on 7/9/13.
//  Copyright (c) 2013 Hotel Tonight. All rights reserved.
//

@interface UIImageView (HTUIImageCategoryNamespaceConflictResolver)

- (void)AF_setImageWithURL:(NSURL *)url;
- (void)AF_setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholderImage;

- (void)SD_setImageWithURL:(NSURL *)url;
- (void)SD_setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder;

@end

@interface UIImageView (HTUIImageCategoryNamespaceConflictDiscourager)

- (void)setImageWithURL:(NSURL *)url __attribute__ ((deprecated));
- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholderImage __attribute__ ((deprecated));

@end

UIImageView+HTUIImageCategoryNamespaceConflictResolver.m

//
//  UIImageView+HTUIImageCategoryNamespaceConflictResolver.m
//  HotelTonight
//
//  Created by Jonathan Sibley on 7/9/13.
//  Copyright (c) 2013 Hotel Tonight. All rights reserved.
//

#import "UIImageView+HTUIImageCategoryNamespaceConflictResolver.h"
#import "UIImageView+AFNetworking.h"
#import "SDWebImage/UIImageView+WebCache.h"

@implementation UIImageView (HTUIImageCategoryNamespaceConflictResolver)

#pragma mark - AFNetworking UIImageView category

- (void)AF_setImageWithURL:(NSURL *)url {
    [self AF_setImageWithURL:url placeholderImage:nil];
}

- (void)AF_setImageWithURL:(NSURL *)url
       placeholderImage:(UIImage *)placeholderImage
{
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    [request setHTTPShouldHandleCookies:NO];
    [request addValue:@"image/*" forHTTPHeaderField:@"Accept"];

    [self setImageWithURLRequest:request placeholderImage:placeholderImage success:nil failure:nil];
}

#pragma mark - SDWebImage UIImageView category

- (void)SD_setImageWithURL:(NSURL *)url
{
    [self setImageWithURL:url placeholderImage:nil options:0 progress:nil completed:nil];
}

- (void)SD_setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder
{
    [self setImageWithURL:url placeholderImage:placeholder options:0 progress:nil completed:nil];
}

@end

To get Xcode to stop the build if one of the clashing methods are used, you can add a Run script-build phase with the following:

! grep -in -r -e ' setImageWithURL:[^:]*];' . --include "*.m"

It will actually show the error inline in the code.