diff --git a/RuntimeDemo.xcodeproj/project.pbxproj b/RuntimeDemo.xcodeproj/project.pbxproj
index d5693c3..b64fed7 100644
--- a/RuntimeDemo.xcodeproj/project.pbxproj
+++ b/RuntimeDemo.xcodeproj/project.pbxproj
@@ -34,6 +34,9 @@
 		69657DE41C44DB520095C032 /* NSObject+Swizzling.m in Sources */ = {isa = PBXBuildFile; fileRef = 69657DE31C44DB520095C032 /* NSObject+Swizzling.m */; };
 		69657DE51C44DB520095C032 /* NSObject+Swizzling.m in Sources */ = {isa = PBXBuildFile; fileRef = 69657DE31C44DB520095C032 /* NSObject+Swizzling.m */; };
 		69657DE61C44DB520095C032 /* NSObject+Swizzling.m in Sources */ = {isa = PBXBuildFile; fileRef = 69657DE31C44DB520095C032 /* NSObject+Swizzling.m */; };
+		69657E2D1C46402D0095C032 /* UIViewController+Swizzling.m in Sources */ = {isa = PBXBuildFile; fileRef = 69657E2C1C46402D0095C032 /* UIViewController+Swizzling.m */; };
+		69657E2E1C46402D0095C032 /* UIViewController+Swizzling.m in Sources */ = {isa = PBXBuildFile; fileRef = 69657E2C1C46402D0095C032 /* UIViewController+Swizzling.m */; };
+		69657E2F1C46402D0095C032 /* UIViewController+Swizzling.m in Sources */ = {isa = PBXBuildFile; fileRef = 69657E2C1C46402D0095C032 /* UIViewController+Swizzling.m */; };
 		697364B11C3A461F003E1FE9 /* HYBMethodExchange.m in Sources */ = {isa = PBXBuildFile; fileRef = 697364B01C3A461F003E1FE9 /* HYBMethodExchange.m */; };
 		697364B21C3A461F003E1FE9 /* HYBMethodExchange.m in Sources */ = {isa = PBXBuildFile; fileRef = 697364B01C3A461F003E1FE9 /* HYBMethodExchange.m */; };
 		697364B31C3A461F003E1FE9 /* HYBMethodExchange.m in Sources */ = {isa = PBXBuildFile; fileRef = 697364B01C3A461F003E1FE9 /* HYBMethodExchange.m */; };
@@ -106,6 +109,8 @@
 		69657DDE1C44D8620095C032 /* NSArray+Swizzling.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSArray+Swizzling.m"; sourceTree = "<group>"; };
 		69657DE21C44DB520095C032 /* NSObject+Swizzling.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSObject+Swizzling.h"; sourceTree = "<group>"; };
 		69657DE31C44DB520095C032 /* NSObject+Swizzling.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSObject+Swizzling.m"; sourceTree = "<group>"; };
+		69657E2B1C46402D0095C032 /* UIViewController+Swizzling.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "UIViewController+Swizzling.h"; sourceTree = "<group>"; };
+		69657E2C1C46402D0095C032 /* UIViewController+Swizzling.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "UIViewController+Swizzling.m"; sourceTree = "<group>"; };
 		697364AF1C3A461F003E1FE9 /* HYBMethodExchange.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HYBMethodExchange.h; sourceTree = "<group>"; };
 		697364B01C3A461F003E1FE9 /* HYBMethodExchange.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HYBMethodExchange.m; sourceTree = "<group>"; };
 		6980598B1C30D6070021085B /* HYBTestModel.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HYBTestModel.h; sourceTree = "<group>"; };
@@ -259,6 +264,8 @@
 				69657DDE1C44D8620095C032 /* NSArray+Swizzling.m */,
 				69657DE21C44DB520095C032 /* NSObject+Swizzling.h */,
 				69657DE31C44DB520095C032 /* NSObject+Swizzling.m */,
+				69657E2B1C46402D0095C032 /* UIViewController+Swizzling.h */,
+				69657E2C1C46402D0095C032 /* UIViewController+Swizzling.m */,
 			);
 			name = MethodExchange;
 			sourceTree = "<group>";
@@ -508,6 +515,7 @@
 				69654F931C30214500FFB5AC /* UIControl+HYBBlock.m in Sources */,
 				69E0205C1C3771AF0034BF32 /* HYBMsgSend.m in Sources */,
 				691D6FC51C421E68003D41FB /* HYBPropertyLearn.m in Sources */,
+				69657E2D1C46402D0095C032 /* UIViewController+Swizzling.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -525,6 +533,7 @@
 				691D6FC61C421E68003D41FB /* HYBPropertyLearn.m in Sources */,
 				698828361C34D476002363D5 /* HYBPig.m in Sources */,
 				697364B21C3A461F003E1FE9 /* HYBMethodExchange.m in Sources */,
+				69657E2E1C46402D0095C032 /* UIViewController+Swizzling.m in Sources */,
 				698828311C34CBAB002363D5 /* HYBDog.m in Sources */,
 				6980598E1C30D6070021085B /* HYBTestModel.m in Sources */,
 				69657DE01C44D8620095C032 /* NSArray+Swizzling.m in Sources */,
@@ -546,6 +555,7 @@
 				691D6FC71C421E68003D41FB /* HYBPropertyLearn.m in Sources */,
 				698828371C34D476002363D5 /* HYBPig.m in Sources */,
 				697364B31C3A461F003E1FE9 /* HYBMethodExchange.m in Sources */,
+				69657E2F1C46402D0095C032 /* UIViewController+Swizzling.m in Sources */,
 				698828321C34CBAB002363D5 /* HYBDog.m in Sources */,
 				6980598F1C30D6070021085B /* HYBTestModel.m in Sources */,
 				69657DE11C44D8620095C032 /* NSArray+Swizzling.m in Sources */,
diff --git a/RuntimeDemo.xcworkspace/xcuserdata/huangyibiao.xcuserdatad/UserInterfaceState.xcuserstate b/RuntimeDemo.xcworkspace/xcuserdata/huangyibiao.xcuserdatad/UserInterfaceState.xcuserstate
index d4e7cb3..f482349 100644
Binary files a/RuntimeDemo.xcworkspace/xcuserdata/huangyibiao.xcuserdatad/UserInterfaceState.xcuserstate and b/RuntimeDemo.xcworkspace/xcuserdata/huangyibiao.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/RuntimeDemo/HDFArchiveModel.m b/RuntimeDemo/HDFArchiveModel.m
index 92694dc..00463f9 100644
--- a/RuntimeDemo/HDFArchiveModel.m
+++ b/RuntimeDemo/HDFArchiveModel.m
@@ -81,6 +81,7 @@ - (instancetype)initWithCoder:(NSCoder *)aDecoder {
         NSString *firstLetter = [NSString stringWithFormat:@"%c", [setterName characterAtIndex:0]];
         setterName = [setterName substringFromIndex:1];
         setterName = [NSString stringWithFormat:@"%@%@", firstLetter.uppercaseString, setterName];
+
 //        [setterName stringByReplacingCharactersInRange:NSMakeRange(0, 0) withString:firstLetter.uppercaseString];
 
       }
diff --git a/RuntimeDemo/HYBMethodExchange.m b/RuntimeDemo/HYBMethodExchange.m
index 42a34bd..6c26070 100644
--- a/RuntimeDemo/HYBMethodExchange.m
+++ b/RuntimeDemo/HYBMethodExchange.m
@@ -39,6 +39,9 @@ + (void)test {
   NSString *nilStr = nil;
   NSArray *array1 = @[@"ara", @"sdf", @"dsfdsf", nilStr];
   NSLog(@"array1.count = %lu", array1.count);
+  
+  // 测试数组中有数组
+  NSArray *array2 = @[@[@"12323", @"nsdf", nilStr], @[@"sdf", @"nilsdf", nilStr, @"sdhfodf"]];
 }
 
 // C语言版
diff --git a/RuntimeDemo/HYBMsgSend.m b/RuntimeDemo/HYBMsgSend.m
index 0c17084..4144733 100644
--- a/RuntimeDemo/HYBMsgSend.m
+++ b/RuntimeDemo/HYBMsgSend.m
@@ -44,17 +44,20 @@ - (float)returnFloatType {
 
 - (CGRect)returnTypeIsStruct {
   NSLog(@"%s was called", __FUNCTION__);
-  
+ 
   return CGRectMake(0, 0, 10, 10);
 }
 
 + (void)test {
   // 1.创建对象
  HYBMsgSend *msg = ((HYBMsgSend * (*)(id, SEL))objc_msgSend)((id)[HYBMsgSend class], @selector(alloc));
+  
   // 2.初始化对象
  msg = ((HYBMsgSend * (*)(id, SEL))objc_msgSend)((id)msg, @selector(init));
+  
   // 3.调用无参数无返回值方法
   ((void (*)(id, SEL))objc_msgSend)((id)msg, @selector(noArgumentsAndNoReturnValue));
+  
   // 4.调用带一个参数但无返回值的方法
   ((void (*)(id, SEL, NSString *))objc_msgSend)((id)msg, @selector(hasArguments:), @"带一个参数，但无返回值");
   // 5.调用带返回值，但是不带参数
@@ -62,7 +65,7 @@ + (void)test {
   NSLog(@"5. 返回值为：%@", retValue);
   // 6.带参数带返回值
   int returnValue = ((int (*)(id, SEL, NSString *, int))
-                     objc_msgSend)((id)msg,
+                     objc_msgSend)(msg,
                                    @selector(hasArguments:andReturnValue:),
                                    @"参数1",
                                    2016);
diff --git a/RuntimeDemo/HYBPropertyLearn.m b/RuntimeDemo/HYBPropertyLearn.m
index a5c0fab..a911822 100644
--- a/RuntimeDemo/HYBPropertyLearn.m
+++ b/RuntimeDemo/HYBPropertyLearn.m
@@ -14,12 +14,13 @@ @implementation HYBPropertyLearn
 
 - (void)getAllProperties {
   unsigned int outCount = 0;
+  // Ivar
   objc_property_t *properties = class_copyPropertyList(self.class, &outCount);
   
   for (unsigned int i = 0; i < outCount; ++i) {
     objc_property_t property = properties[i];
      const char *propertyName = property_getName(property);
-    
+
    const char *propertyAttributes = property_getAttributes(property);
     NSLog(@"%s  %s", propertyName, propertyAttributes);
     
diff --git a/RuntimeDemo/HYBTestModel.m b/RuntimeDemo/HYBTestModel.m
index 3286bf7..60f9396 100644
--- a/RuntimeDemo/HYBTestModel.m
+++ b/RuntimeDemo/HYBTestModel.m
@@ -31,12 +31,13 @@ - (instancetype)initWithDictionary:(NSDictionary *)dictionary {
       }
     }
   }
-  
+
   return self;
 }
 
 - (NSDictionary *)toDictionary {
   unsigned int outCount = 0;
+
   objc_property_t *properties = class_copyPropertyList([self class], &outCount);
   
   if (outCount != 0) {
diff --git a/RuntimeDemo/Info.plist b/RuntimeDemo/Info.plist
index 6905cc6..65ca776 100644
--- a/RuntimeDemo/Info.plist
+++ b/RuntimeDemo/Info.plist
@@ -22,6 +22,11 @@
 	<string>1</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSAppTransportSecurity</key>
+	<dict>
+		<key>NSAllowsArbitraryLoads</key>
+		<true/>
+	</dict>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
 	<key>UIMainStoryboardFile</key>
diff --git a/RuntimeDemo/NSArray+Swizzling.m b/RuntimeDemo/NSArray+Swizzling.m
index 2dcba77..0565d66 100644
--- a/RuntimeDemo/NSArray+Swizzling.m
+++ b/RuntimeDemo/NSArray+Swizzling.m
@@ -12,18 +12,22 @@
 
 @implementation NSArray (Swizzling)
 
-//+ (void)load {
-//  static dispatch_once_t onceToken;
-//  dispatch_once(&onceToken, ^{
-//    [self swizzleSelector:@selector(lastObject)
-//     withSwizzledSelector:@selector(hdf_lastObject)];
-//  });
-//}
++ (void)load {
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    [self swizzleSelector:@selector(lastObject)
+     withSwizzledSelector:@selector(hdf_lastObject)];
+  });
+}
 
 - (id)hdf_lastObject {
-  NSLog(@"%s", __FUNCTION__);
+  if (self.count == 0) {
+    NSLog(@"%s 数组为空，直接返回nil", __FUNCTION__);
+    
+    return nil;
+  }
   
- return [self hdf_lastObject];
+  return [self hdf_lastObject];
 }
 
 
diff --git a/RuntimeDemo/NSMutableArray+Swizzling.m b/RuntimeDemo/NSMutableArray+Swizzling.m
index 98950d6..c806659 100644
--- a/RuntimeDemo/NSMutableArray+Swizzling.m
+++ b/RuntimeDemo/NSMutableArray+Swizzling.m
@@ -12,46 +12,52 @@
 
 @implementation NSMutableArray (Swizzling)
 
-//+ (void)load {
-//  static dispatch_once_t onceToken;
-//  dispatch_once(&onceToken, ^{
-//    [self swizzleSelector:@selector(removeObject:)
-//     withSwizzledSelector:@selector(hdf_safeRemoveObject:)];
-//    
-//    [objc_getClass("__NSArrayM") swizzleSelector:@selector(addObject:)
-//     withSwizzledSelector:@selector(hdf_safeAddObject:)];
-//    [objc_getClass("__NSArrayM") swizzleSelector:@selector(removeObjectAtIndex:)
-//                            withSwizzledSelector:@selector(hdf_safeRemoveObjectAtIndex:)];
-// 
-//    [objc_getClass("__NSArrayM") swizzleSelector:@selector(insertObject:atIndex:)
-//     withSwizzledSelector:@selector(hdf_insertObject:atIndex:)];
-//    
-//    [objc_getClass("__NSPlaceholderArray") swizzleSelector:@selector(initWithObjects:count:) withSwizzledSelector:@selector(hdf_initWithObjects:count:)];
-//    
-//    [objc_getClass("__NSArrayM") swizzleSelector:@selector(objectAtIndex:) withSwizzledSelector:@selector(hdf_objectAtIndex:)];
-//  });
-//}
++ (void)load {
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    [self swizzleSelector:@selector(removeObject:)
+     withSwizzledSelector:@selector(hdf_safeRemoveObject:)];
+    
+    [objc_getClass("__NSArrayM") swizzleSelector:@selector(addObject:)
+     withSwizzledSelector:@selector(hdf_safeAddObject:)];
+    [objc_getClass("__NSArrayM") swizzleSelector:@selector(removeObjectAtIndex:)
+                            withSwizzledSelector:@selector(hdf_safeRemoveObjectAtIndex:)];
+ 
+    [objc_getClass("__NSArrayM") swizzleSelector:@selector(insertObject:atIndex:)
+     withSwizzledSelector:@selector(hdf_insertObject:atIndex:)];
+    
+    [objc_getClass("__NSPlaceholderArray") swizzleSelector:@selector(initWithObjects:count:) withSwizzledSelector:@selector(hdf_initWithObjects:count:)];
+    
+    [objc_getClass("__NSArrayM") swizzleSelector:@selector(objectAtIndex:) withSwizzledSelector:@selector(hdf_objectAtIndex:)];
+  });
+}
 
 - (instancetype)hdf_initWithObjects:(const id  _Nonnull __unsafe_unretained *)objects count:(NSUInteger)cnt {
   BOOL hasNilObject = NO;
   for (NSUInteger i = 0; i < cnt; i++) {
+    if ([objects[i] isKindOfClass:[NSArray class]]) {
+      NSLog(@"%@", objects[i]);
+    }
     if (objects[i] == nil) {
+      hasNilObject = YES;
+      NSLog(@"%s object at index %lu is nil, it will be filtered", __FUNCTION__, i);
+      
 //#if DEBUG
+//      // 如果可以对数组中为nil的元素信息打印出来，增加更容易读懂的日志信息，这对于我们改bug就好定位多了
 //      NSString *errorMsg = [NSString stringWithFormat:@"数组元素不能为nil，其index为: %lu", i];
 //      NSAssert(objects[i] != nil, errorMsg);
 //#endif
-      hasNilObject = YES;
-      NSLog(@"%s object at index %lu is nil, it will be filtered", __FUNCTION__, i);
     }
   }
   
+  // 因为有值为nil的元素，那么我们可以过滤掉值为nil的元素
   if (hasNilObject) {
     id __unsafe_unretained newObjects[cnt];
     
     NSUInteger index = 0;
     for (NSUInteger i = 0; i < cnt; ++i) {
       if (objects[i] != nil) {
-        newObjects[index++] = objects[i];
+          newObjects[index++] = objects[i];
       }
     }
     
@@ -61,6 +67,7 @@ - (instancetype)hdf_initWithObjects:(const id  _Nonnull __unsafe_unretained *)ob
   return [self hdf_initWithObjects:objects count:cnt];
 }
 
+
 - (void)hdf_safeAddObject:(id)obj {
   if (obj == nil) {
     NSLog(@"%s can add nil object into NSMutableArray", __FUNCTION__);
diff --git a/RuntimeDemo/NSObject+Swizzling.m b/RuntimeDemo/NSObject+Swizzling.m
index 5abdec6..6b59502 100644
--- a/RuntimeDemo/NSObject+Swizzling.m
+++ b/RuntimeDemo/NSObject+Swizzling.m
@@ -14,13 +14,10 @@ @implementation NSObject (Swizzling)
 // 全面
 + (void)swizzleSelector:(SEL)originalSelector withSwizzledSelector:(SEL)swizzledSelector {
   Class class = [self class];
-  
+
   Method originalMethod = class_getInstanceMethod(class, originalSelector);
   Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
   
-//  IMP oIMP = class_getMethodImplementation(class, originalSelector);
-//  IMP nIMP = class_getMethodImplementation(class, swizzledSelector);
-//  
   // 若已经存在，则添加会失败
   BOOL didAddMethod = class_addMethod(class,
                                       originalSelector,
diff --git a/RuntimeDemo/UIViewController+Swizzling.h b/RuntimeDemo/UIViewController+Swizzling.h
new file mode 100644
index 0000000..41535b7
--- /dev/null
+++ b/RuntimeDemo/UIViewController+Swizzling.h
@@ -0,0 +1,13 @@
+//
+//  UIWebView+Swizzling.h
+//  RuntimeDemo
+//
+//  Created by huangyibiao on 16/1/13.
+//  Copyright © 2016年 huangyibiao. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface UIViewController (Swizzling)<UIWebViewDelegate>
+
+@end
diff --git a/RuntimeDemo/UIViewController+Swizzling.m b/RuntimeDemo/UIViewController+Swizzling.m
new file mode 100644
index 0000000..49ed5fa
--- /dev/null
+++ b/RuntimeDemo/UIViewController+Swizzling.m
@@ -0,0 +1,42 @@
+//
+//  UIWebView+Swizzling.m
+//  RuntimeDemo
+//
+//  Created by huangyibiao on 16/1/13.
+//  Copyright © 2016年 huangyibiao. All rights reserved.
+//
+
+#import "UIViewController+Swizzling.h"
+#import "NSObject+Swizzling.h"
+
+@implementation UIViewController (Swizzling)
+
++ (void)load {
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    [self swizzleSelector:@selector(webView:shouldStartLoadWithRequest:navigationType:)
+     withSwizzledSelector:@selector(hdf_webView:shouldStartLoadWithRequest:navigationType:)];
+  });
+}
+
+- (BOOL)hdf_webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
+  NSString *url = request.URL.absoluteString;
+  
+  // 注意containsString是iOS8以后才有，具体要兼容ios6则需要自己写
+  // 这里只是为了简便测试
+  if ([url containsString:@"userId"] && [url containsString:@"token"]) {
+    return [self hdf_webView:webView shouldStartLoadWithRequest:request navigationType:navigationType];
+  }
+  
+  if ([url isEqualToString:@"about:blank"]) {
+    return [self hdf_webView:webView shouldStartLoadWithRequest:request navigationType:navigationType];
+  }
+  
+  url = [NSString stringWithFormat:@"%@?userId=123&token=ssdfsfdf", url];
+  NSURLRequest *req = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
+  [webView loadRequest:req];
+  
+  return NO;
+}
+
+@end
diff --git a/RuntimeDemo/ViewController.m b/RuntimeDemo/ViewController.m
index 76578fd..90158e4 100644
--- a/RuntimeDemo/ViewController.m
+++ b/RuntimeDemo/ViewController.m
@@ -16,8 +16,11 @@
 #import "HYBMethodExchange.h"
 #import "HYBPropertyLearn.h"
 #import "HYBMethodLearn.h"
+#import "UIViewController+Swizzling.h"
 
-@interface ViewController ()
+@interface ViewController () <UIWebViewDelegate>
+
+@property (nonatomic, strong) UIWebView *webView;
 
 @end
 
@@ -33,12 +36,22 @@ - (void)viewDidLoad {
 //  [HYBMsgSend test];
 //  [HYBMethodExchange test];
 //  [HYBPropertyLearn test];
-  [HYBMethodLearn test];
+//  [HYBMethodLearn test];
+  [self testWebview];
+}
+
+- (void)testWebview {
+  self.webView = [[UIWebView alloc] initWithFrame:self.view.bounds];
+  self.webView.delegate = self;
+  NSURLRequest *req = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.haodf.com/"]];
+  [self.webView loadRequest:req];
 }
 
-- (void)didReceiveMemoryWarning {
-  [super didReceiveMemoryWarning];
-  // Dispose of any resources that can be recreated.
+
+- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
+  NSLog(@"url: %@", request.URL.absoluteString);
+  
+  return YES;
 }
 
 @end