文档

ASHBlockTest/ASHBlockTest.xcodeproj/project.pbxproj

@@ -13,6 +13,7 @@
 		A930BA351DEC2D7A000A48E0 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = A930BA331DEC2D7A000A48E0 /* Main.storyboard */; };
 		A930BA371DEC2D7A000A48E0 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = A930BA361DEC2D7A000A48E0 /* Assets.xcassets */; };
 		A930BA3A1DEC2D7A000A48E0 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = A930BA381DEC2D7A000A48E0 /* LaunchScreen.storyboard */; };
+		A930BA431DEC3234000A48E0 /* ViewController2.m in Sources */ = {isa = PBXBuildFile; fileRef = A930BA421DEC3234000A48E0 /* ViewController2.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -26,6 +27,8 @@
 		A930BA361DEC2D7A000A48E0 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		A930BA391DEC2D7A000A48E0 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		A930BA3B1DEC2D7A000A48E0 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		A930BA411DEC3234000A48E0 /* ViewController2.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ViewController2.h; sourceTree = "<group>"; };
+		A930BA421DEC3234000A48E0 /* ViewController2.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ViewController2.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -67,6 +70,8 @@
 				A930BA381DEC2D7A000A48E0 /* LaunchScreen.storyboard */,
 				A930BA3B1DEC2D7A000A48E0 /* Info.plist */,
 				A930BA2A1DEC2D7A000A48E0 /* Supporting Files */,
+				A930BA411DEC3234000A48E0 /* ViewController2.h */,
+				A930BA421DEC3234000A48E0 /* ViewController2.m */,
 			);
 			path = ASHBlockTest;
 			sourceTree = "<group>";
@@ -151,6 +156,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				A930BA321DEC2D7A000A48E0 /* ViewController.m in Sources */,
+				A930BA431DEC3234000A48E0 /* ViewController2.m in Sources */,
 				A930BA2F1DEC2D7A000A48E0 /* AppDelegate.m in Sources */,
 				A930BA2C1DEC2D7A000A48E0 /* main.m in Sources */,
 			);

ASHBlockTest/ASHBlockTest.xcodeproj/xcuserdata/xmfish.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Bucket
+   type = "1"
+   version = "2.0">
+   <Breakpoints>
+      <BreakpointProxy
+         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
+         <BreakpointContent
+            shouldBeEnabled = "No"
+            ignoreCount = "0"
+            continueAfterRunningActions = "No"
+            filePath = "ASHBlockTest/ViewController.m"
+            timestampString = "502018955.274517"
+            startingColumnNumber = "9223372036854775807"
+            endingColumnNumber = "9223372036854775807"
+            startingLineNumber = "28"
+            endingLineNumber = "28"
+            landmarkName = "-viewDidLoad"
+            landmarkType = "7">
+         </BreakpointContent>
+      </BreakpointProxy>
+      <BreakpointProxy
+         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
+         <BreakpointContent
+            shouldBeEnabled = "Yes"
+            ignoreCount = "0"
+            continueAfterRunningActions = "No"
+            filePath = "ASHBlockTest/ViewController.m"
+            timestampString = "502097642.465386"
+            startingColumnNumber = "9223372036854775807"
+            endingColumnNumber = "9223372036854775807"
+            startingLineNumber = "77"
+            endingLineNumber = "77"
+            landmarkName = "-pushNewAction:"
+            landmarkType = "7">
+         </BreakpointContent>
+      </BreakpointProxy>
+      <BreakpointProxy
+         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
+         <BreakpointContent
+            shouldBeEnabled = "Yes"
+            ignoreCount = "0"
+            continueAfterRunningActions = "No"
+            filePath = "ASHBlockTest/ViewController2.m"
+            timestampString = "502079171.219429"
+            startingColumnNumber = "9223372036854775807"
+            endingColumnNumber = "9223372036854775807"
+            startingLineNumber = "51"
+            endingLineNumber = "51"
+            landmarkName = "-setTitleBtnAction:"
+            landmarkType = "7">
+         </BreakpointContent>
+      </BreakpointProxy>
+   </Breakpoints>
+</Bucket>

ASHBlockTest/ASHBlockTest/AppDelegate.m

@@ -8,6 +8,7 @@
 
 #import "AppDelegate.h"
 
+#import "ViewController.h"
 @interface AppDelegate ()
 
 @end
@@ -17,6 +18,8 @@
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     // Override point for customization after application launch.
+    
+    self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:[ViewController new]];
     return YES;
 }
 

ASHBlockTest/ASHBlockTest/ViewController.m

@@ -7,9 +7,9 @@
 //
 
 #import "ViewController.h"
-
+#import "ViewController2.h"
 @interface ViewController ()
-
+@property (nonatomic, strong)UILabel* infoLabel;
 @end
 
 @implementation ViewController
@@ -17,9 +17,69 @@
 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.
+    
+    self.title = @"首页";
+    self.view.backgroundColor = [UIColor whiteColor];
+    
+    //第一个int，block的返回值，addBlock block名称，,后面的两个int是传入的参数
+    int (^addBlock)(int, int) = ^(int num1, int num2){
+        return  num1 + num2;
+    };
+    
+    NSLog(@"相加值是:%d",addBlock(10,20));
+    
+    //先声明，再实现
+    int (^mulBlock)(int, int);
+    mulBlock =  ^(int num1, int num2){
+        return num1 * num2;
+    };
+    
+    NSLog(@"相乘值是:%d",mulBlock(2,5));
+    
+    
+    UIButton* pushNewBtn = [UIButton new];
+    pushNewBtn.backgroundColor = [UIColor grayColor];
+    [pushNewBtn setTitle:@"点击" forState:UIControlStateNormal];
+    pushNewBtn.frame = CGRectMake(20, 150, 80, 50);
+    [pushNewBtn addTarget:self action:@selector(pushNewAction:) forControlEvents:UIControlEventTouchUpInside];
+    
+    [self.view addSubview:pushNewBtn];
+    
+    self.infoLabel = [UILabel new];
+    self.infoLabel.backgroundColor = [UIColor whiteColor];
+    self.infoLabel.textColor = [UIColor greenColor];
+    self.infoLabel.frame = CGRectMake(120, 150, 180, 50);
+    self.infoLabel.text = @"还没有点击";
+    
+    [self.view addSubview:self.infoLabel];
+    
+    
+    __block int num = 20;
+    
+    void (^changeNum)(void) = ^(void){
+        num = 30;
+    };
+    NSLog(@"变化之前：%d",num);
+    changeNum();
+    NSLog(@"变化之后：%d",num);
 }
 
-
+#pragma mark 点击进入下一页
+- (void)pushNewAction:(id)sender
+{
+    ViewController2* nextVC = [ViewController2 new];
+    
+    __weak ViewController* wself = self;
+    
+    nextVC.getClickInfo = ^(NSInteger tag){
+        
+        __strong ViewController* sself = wself;
+        
+        sself.infoLabel.text = [NSString stringWithFormat:@"点击了第%ld个按钮",tag];
+        return 1;
+    };
+    [self.navigationController pushViewController:nextVC animated:YES];
+}
 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.

ASHBlockTest/ASHBlockTest/ViewController2.h

@@ -0,0 +1,14 @@
+//
+//  ViewController2.h
+//  ASHBlockTest
+//
+//  Created by xmfish on 16/11/28.
+//  Copyright © 2016年 ash. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface ViewController2 : UIViewController
+
+@property(nonatomic, copy) int(^getClickInfo)(NSInteger);
+@end

ASHBlockTest/ASHBlockTest/ViewController2.m

@@ -0,0 +1,74 @@
+//
+//  ViewController2.m
+//  ASHBlockTest
+//
+//  Created by xmfish on 16/11/28.
+//  Copyright © 2016年 ash. All rights reserved.
+//
+
+#import "ViewController2.h"
+
+@interface ViewController2 ()
+
+@end
+
+@implementation ViewController2
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    // Do any additional setup after loading the view.
+    
+    self.title = @"第二页";
+    self.view.backgroundColor = [UIColor whiteColor];
+    
+    UIButton* btn1 = [UIButton new];
+    btn1.backgroundColor = [UIColor grayColor];
+    [btn1 setTitle:@"按钮1" forState:UIControlStateNormal];
+    btn1.frame = CGRectMake(20, 150, 80, 50);
+    btn1.tag = 1;
+    [btn1 addTarget:self action:@selector(setTitleBtnAction:) forControlEvents:UIControlEventTouchUpInside];
+    
+    [self.view addSubview:btn1];
+    
+    UIButton* btn2 = [UIButton new];
+    btn2.backgroundColor = [UIColor grayColor];
+    [btn2 setTitle:@"按钮2" forState:UIControlStateNormal];
+    btn2.frame = CGRectMake(120, 150, 80, 50);
+    btn2.tag = 2;
+    [btn2 addTarget:self action:@selector(setTitleBtnAction:) forControlEvents:UIControlEventTouchUpInside];
+    
+    [self.view addSubview:btn2];
+    
+}
+- (void)setTitleBtnAction:(id)sender
+{
+    if([sender isKindOfClass:[UIButton class]]){
+        UIButton* btn = sender;
+        
+        int (^TempBlock)(NSInteger);
+        TempBlock = self.getClickInfo;
+        
+        if (TempBlock) {
+            if(TempBlock(btn.tag))
+            {
+                NSLog(@"设置成功");
+            }
+        }
+    }
+}
+- (void)didReceiveMemoryWarning {
+    [super didReceiveMemoryWarning];
+    // Dispose of any resources that can be recreated.
+}
+
+/*
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+}
+*/
+
+@end

README.md

@@ -1,2 +1,69 @@
-# ASHBlockTest
-Block学习
+#block基础用法
+
+### 1. block定义
+
+```
+    //第一个int，block的返回值，addBlock block名称，,后面的两个int是传入的参数
+    int (^addBlock)(int, int) = ^(int num1, int num2){
+        return  num1 + num2;
+    };
+    
+    NSLog(@"相加值是:%d",addBlock(10,20));
+    
+    //先声明，再实现
+    int (^mulBlock)(int, int);
+    mulBlock =  ^(int num1, int num2){
+        return num1 * num2;
+    };
+    
+    NSLog(@"相乘值是:%d",mulBlock(2,5));
+```
+### 2. 修改局部变量
+
+###需要用到 `__block` 参数修饰
+
+```
+    __block int num = 20;
+    
+    void (^changeNum)(void) = ^(void){
+        num = 30;
+    };
+    NSLog(@"变化之前：%d",num);
+    changeNum();
+    NSLog(@"变化之后：%d",num);
+```
+### 3. block的调用
+直接使用即可  `NSLog(@"相乘值是:%d",mulBlock(2,5));`
+
+### 4. 使用，可以代替delegate,这个也是我一开始喜欢它的原因
+具体可以项目内的代码，首先先设置
+
+```
+    __weak ViewController* wself = self;
+    
+    nextVC.getClickInfo = ^(NSInteger tag){
+        
+        __strong ViewController* sself = wself;
+        
+        sself.infoLabel.text = [NSString stringWithFormat:@"点击了第%ld个按钮",tag];
+        return 1;
+    };
+```
+其中 先设置`__weak`的原因是解决循环引用的问题, 内部 `__strong`是为了防止使用多线程的时候出错的.
+
+<font color = green>在另一个 VC 先定义一个属性</font> `@property(nonatomic, copy) int(^getClickInfo)(NSInteger);`
+
+
+```
+        int (^TempBlock)(NSInteger);
+        TempBlock = self.getClickInfo;
+        
+        if (TempBlock) {
+            if(TempBlock(btn.tag))
+            {
+                NSLog(@"设置成功");
+            }
+        }
+```
+
+其中设置 `TempBlock ` 也是防止多线程的时候被提前释放的问题.