+ [UIImage noNilImageNamed:]

noNilImageNamed

//
//  UIImage+NoNilImageNamed.m
//  UARecord
//
//  Created by DX131 on 2/26/15.
//  Copyright (c) 2015 Under Armour. All rights reserved.
//

#import "UIImage+NoNilImageNamed.h"
#import <objc/runtime.h>

@implementation UIImage (NoNilImageNamed)

+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        method_exchangeImplementations(class_getClassMethod(self, @selector(imageNamed:)), class_getClassMethod(self, @selector(noNilImageNamed:)));
    });
}

#pragma mark - Method Swizzling

+ (instancetype)noNilImageNamed:(NSString *)imageName {
    if (imageName && imageName.length) {
        return [UIImage noNilImageNamed:imageName];
    }

    NSString *sourceString = [[NSThread callStackSymbols] objectAtIndex:1];
    NSCharacterSet *separatorSet = [NSCharacterSet characterSetWithCharactersInString:@" -[]+?.,"];
    NSMutableArray *array = [NSMutableArray arrayWithArray:[sourceString componentsSeparatedByCharactersInSet:separatorSet]];
    [array removeObject:@""];
    UALog(@"Called [UIImage imageNamed:] with a nil image name from [%@ %@]", array[3], array[4]);

    return nil;
}

@end