add ios avoid crash

Change-Id: I88258f6d5b9bb721e74cfdd68a906829fdd7f4b3

crash01.m

+//
+//  UIView+Test.m
+//  AnyChatXingYe
+//
+//  Created by Mac on 2019/4/17.
+//  Copyright © 2019 BaiRuiTechnology. All rights reserved.
+//
+
+#import "UIView+Test.h"
+#import <objc/runtime.h>
+
+@implementation UIView (Test)
+
++ (BOOL)resolveInstanceMethod:(SEL)sel {
+    return NO;
+}
+
+- (id)forwardingTargetForSelector:(SEL)aSelector {
+    NSString *sel = NSStringFromSelector(aSelector);
+    
+//    if ([sel isEqualToString:@"setImage:"] || [sel containsString:@"image"])
+    {
+        //1
+//        return [UIImageView new];
+        //2
+        Class class = objc_allocateClassPair(NSClassFromString(@"NSObject"),"AvoidCrashTarget",0);
+        class_addMethod(class, aSelector, class_getMethodImplementation([self class], @selector(avoidCrashAction)), "@@:");
+//        //3
+//        NSString* name = @"AvoidCrashTarget";
+//        Class class = NSClassFromString(name);
+//        if (!class) {
+//            //alloc class pair
+//            class = objc_allocateClassPair(NSClassFromString(@"NSObject"), name.UTF8String, 0);
+//            //never try to add ivar to the new class, or you will find place using a wrong map.
+//
+//            //register the class
+//            //
+//            objc_registerClassPair(class);
+//            class_addMethod(class, aSelector, class_getMethodImplementation([self class], @selector(avoidCrashAction)), "@@:");
+//        }
+        
+        id tempObject = [[class alloc] init];
+        return tempObject;
+    }
+    
+    return [super forwardingTargetForSelector:aSelector];
+}
+
+- (NSObject *)avoidCrashAction {
+    return nil;
+}
+
+@end