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大概因为在编程方面没有天份吧,对MVC一直不是很了解.直到今天看到一篇博文.内容虽然很少,但是对于MVC初学者真的很棒!(原文地址:http://blog.csdn.net/u012361288/article/details/51701676)
下面是针对博文作者写的demo做的其他方面的一些修改.写此文,只是为了梳理个人思路.
首先是View文件
NLView.h
#import <UIKit/UIKit.h>
@interface NLView : UIView
/** send按钮 */
@property (nonatomic, strong) UIButton* sendBtn;
/** receive按钮 */
@property (nonatomic, strong) UIButton* receiveBtn;
/** 保存成功label */
@property (nonatomic, strong) UILabel* successfulLabel;
/**
*初始化控件
*/
- (void)viewInit;
@end
NLView.m
#import "NLView.h"
@implementation NLView
- (void)viewInit
{
_sendBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[_sendBtn setFrame:CGRectMake(50, 50, 150, 80)];
[_sendBtn setTitle:@"保存" forState:UIControlStateNormal];
[_sendBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; //默认的页面背景色是白色，butotn上的文字的默认颜色也是白色，所以在此处将button上的文字颜色设置为黑色，以便显示
[self addSubview:_sendBtn];
_receiveBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[_receiveBtn setFrame:CGRectMake(50, 160, 150, 80)];
[_receiveBtn setTitle:@"加载" forState:UIControlStateNormal];
[_receiveBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[self addSubview:_receiveBtn];
_successfulLabel = [[UILabel alloc] init];
[_successfulLabel setFrame:CGRectMake(50, 240, 150, 80)];
[_successfulLabel setTextColor:[UIColor blackColor]];
[self addSubview:_successfulLabel];
}
@end
然后是Model
NLModel.h
#import <Foundation/Foundation.h>
@interface NLModel : NSObject
- (void)save;
- (void)load;
@end
NLModel.m
#import "NLModel.h"
@implementation NLModel
- (void)save
{
NSLog(@"**************保存************");
/**
*使用Notification模式发送一个通知,用于通知controller要做什么事情
*userInfo:这里增添name键值,是为了在控制器区分通知
*/
[[NSNotificationCenter defaultCenter] postNotificationName:@"successful" object:self userInfo:@{@"name":@"successful"}];
}
- (void)load
{
NSLog(@"*************加载************");
[[NSNotificationCenter defaultCenter] postNotificationName:@"load" object:self userInfo:@{@"name":@"load"}];
}
@end
最后是Controller奉上
ViewController.h
#import <UIKit/UIKit.h>
#import "NLView.h"
#import "NLModel.h"
@interface ViewController : UIViewController
/** 实例化一个NLView对象 */
@property (nonatomic, strong) NLView* nlView;
/** 实例化一个NLModel对象 */
@property (nonatomic, strong) NLModel* nlModel;
@end
ViewController.m
#import "ViewController.h"
#define deviceScreenWidth [[UIScreen mainScreen]bounds].size.width
#define deviceScreenHeight [[UIScreen mainScreen]bounds].size.height
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
/**
*当这个controller接收到一个名称为@"successful"通知后,执行saveOk:
*/
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(saveOK:)
name:@"successful"
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(saveOK:) name:@"load" object:nil];
_nlView = [[NLView alloc]initWithFrame:CGRectMake(0, 0, deviceScreenWidth, deviceScreenHeight)]; //初始化时一定要设置frame，否则VView上的两个按钮将无法被点击
[_nlView viewInit];
[_nlView.sendBtn addTarget:self action:@selector(saveBtnPressed:) forControlEvents:UIControlEventTouchUpInside]; //为“保存”按钮添加target-action模式
[_nlView.receiveBtn addTarget:self action:@selector(loadBtnPressed:) forControlEvents:UIControlEventTouchUpInside]; //为“加载”按钮添加target-action模式
[self.view addSubview:_nlView];
_nlModel = [[NLModel alloc]init];
}
- (void)saveBtnPressed : (UIButton*)sender{
[_nlModel save]; //调用MModel.h中的方法(API)
_nlView.successfulLabel.text = @"保存成功";
}
- (void)loadBtnPressed : (UIButton*)sender{
[_nlModel load]; //调用MModel.h中的方法(API)
}
- (void)saveOK : (NSNotification*) notification{
NSString *str;
/**
*根据userInfo中的name判断,是那个通知
*/
if([notification.userInfo[@"name"] isEqualToString:@"load"])
{
str = @"加载中";
}
else if([notification.userInfo[@"name"] isEqualToString:@"successful"])
{
str= @"保存成功";
}
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"恭喜"
message:str
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
NSLog(@"点击了取消按钮");
}];
UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
NSLog(@"点击了确定按钮");
}];
[alertController addAction:cancelAction];
[alertController addAction:okAction];
[self presentViewController:alertController animated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
这就是所有工程文件,在学习MVC的同时,也看了通知的知识.
