iOS 学习资料整理
写在前面-（学习背景）
从去年开始就想跳入iOS开发的这个坑，从看C语言开始，到Objective-C的语法，看的很慢，效率奇低，中间穿插着瞎搞了一段时间C++，觉得什么都做不出来，又去干MFC，总算是搞出来一个垃圾的音乐播放器（这个后面也会把它写出来）。然后又拐回来跟着一个好兄弟的脚步二战OC，又是拖拖拉拉，看了忘，忘了从头来，加上自己总是找借口，找理由抵制学习。然后想到了简书，从UI控件基础重新开始，来记录我的学习进度。
首先做了一张我理解的iOS开发的简单的步骤的导图。

至此一个简单的加法器的界面搭建完毕（很简陋，但是千里之行始于足下。）commond+R 运行，查看效果。

接下来就开始编写实现加法的代码。
(代码和控件建立连接)

加法的实现代码：

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #1d9421}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; min-height: 21.0px}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #c91b13}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #3c828c}p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo}p.p6 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #c32275}p.p7 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #3d1d81}span.s1 {font-variant-ligatures: no-common-ligatures}span.s2 {font: 18.0px 'PingFang SC'; font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures; color: #822e0e}span.s4 {font-variant-ligatures: no-common-ligatures; color: #c32275}span.s5 {font-variant-ligatures: no-common-ligatures; color: #000000}span.s6 {font-variant-ligatures: no-common-ligatures; color: #6122ae}span.s7 {font-variant-ligatures: no-common-ligatures; color: #539aa4}span.s8 {font-variant-ligatures: no-common-ligatures; color: #703daa}span.s9 {font-variant-ligatures: no-common-ligatures; color: #3d1d81}span.s10 {font-variant-ligatures: no-common-ligatures; color: #c91b13}

//
//  ViewController.m
//  addApp
//
//  Created by 袁跃 on 16/4/19.
//  Copyright © 2016年 iflytek. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
- (IBAction)addCompute;

@property (weak, nonatomic) IBOutlet UITextField *TxtNum1;

@property (weak, nonatomic) IBOutlet UITextField *txtNum2;

@property (weak, nonatomic) IBOutlet UILabel *addResult;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)addCompute {
    
    
    NSString *num1 = self.TxtNum1.text;
    NSString *num2 = self.txtNum2.text;
    
    int n1 = [num1 intValue];
    int n2 = [num2 intValue];
    
    int result = n1+n2;
    
    self.addResult.text = [NSString stringWithFormat:@"%d",result];
    
    [self.view endEditing:YES];
    
    
}
@end

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #1d9421}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; min-height: 21.0px}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #c91b13}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo}p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #c32275}span.s1 {font-variant-ligatures: no-common-ligatures}span.s2 {font: 18.0px 'PingFang SC'; font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures; color: #822e0e}span.s4 {font-variant-ligatures: no-common-ligatures; color: #c32275}span.s5 {font-variant-ligatures: no-common-ligatures; color: #6122ae}

//
//  ViewController.h
//  addApp
//
//  Created by 袁跃 on 16/4/19.
//  Copyright © 2016年 iflytek. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@end

至此，加法器完成，效果如下：