2013-07-22 IOS-User Interface

最新推荐文章于 2025-02-20 17:42:29 发布

Elena_Lee

最新推荐文章于 2025-02-20 17:42:29 发布

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分类专栏： IOS

本文链接：https://blog.youkuaiyun.com/litingyan16/article/details/9449847

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本文介绍了一个简单的iOS应用程序，演示了如何使用UIKit中的基本组件如UILabel、UITextField和UIButton来实现一个加法计算器。从创建控件到事件处理，文章详细解释了iOS UI编程的基本步骤。

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ios常用控件
熟悉事件处理机制
iOS动画效果
掌握不同ViewController的使用场景，使用方法
iOS的各种设计模式
iOS硬件特性，会硬件编程
网络应用开发，数据持久化，多线程开发

UI加法运算
UITextFiled，常用于显示少量信息的空间
text
textcolor

// AppDelegate.h

// UI_1

// Created by 0101 on 13-7-22.

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

{

UILabel *label1;

UITextField *tf1;

UITextField *tf2;

UIButton *btn;

UILabel *result;

UIWindow *_window;

}

@property (retain, nonatomic) UIWindow *window;

@end

.m文件

CGRect r = CGRectMake(0, 0, 320, 508);//创建一个矩形

//属性的赋值方式

//方式一

self.window = [[[UIWindow alloc]initWithFrame:r]autorelease];

self.window.backgroundColor = [UIColor redColor];

//方式二

UIWindow *aWin = [[UIWindow alloc]initWithFrame:r];//iOS不支持多窗口 iPhone4/4s 320*480像素 iPhone5s 320*508像素一个App的高度44*44像素 aWin retainCount = 1

self.window = aWin;//aWin retainCount = 2

aWin.backgroundColor = [UIColor grayColor];

[aWin release];//aWin retainCount = 1,此时该 retainCount = 1归Window，但是window的引用计数没有变化它还是1，此时只是控制权归window，单这并不代表它的引用计数归谁，拥有控制权就一定要释放。

//Label 标签

label1 = [[UILabel alloc]initWithFrame:CGRectMake(10, 90, 40, 30)];

label1.backgroundColor = [UIColor whiteColor];

label1.text = @"";

label1.textAlignment = NSTextAlignmentLeft;

[self.window addSubview:label1];

[label1 release];

//TextFiled 文本输入框 tf1

tf1= [[UITextField alloc]initWithFrame:CGRectMake(10, 50, 40, 30)];

tf1.borderStyle = UITextBorderStyleLine;

tf1.contentVerticalAlignment = UIControlContentHorizontalAlignmentCenter;

tf1.keyboardType = UIKeyboardTypeNumberPad;

[self.window addSubview:tf1];

[tf1 release];

//加号label

UILabel *plus = [[UILabel alloc]initWithFrame:CGRectMake(60, 50, 20, 30)];

plus.text = @"+";

plus.backgroundColor = [UIColor clearColor];

plus.textAlignment = NSTextAlignmentCenter;

[self.window addSubview:plus];

[plus release];

//TextFiled 文本输入框 tf2

tf2 = [[UITextField alloc]initWithFrame:CGRectMake(100, 50, 40, 30)];;

tf2.borderStyle = UITextBorderStyleLine;

tf2.keyboardType = UIKeyboardTypeNumberPad;

[self.window addSubview:tf2];

[tf2 release];

//等号

UILabel *equal = [[UILabel alloc]initWithFrame:CGRectMake(150, 50, 20, 30)];

equal.backgroundColor = [UIColor clearColor];

equal.text = @"=";

equal.textAlignment = NSTextAlignmentCenter;

[self.window addSubview:equal];

[equal release];

//计算结果

result = [[UILabel alloc]initWithFrame:CGRectMake(200, 50, 40, 30)];

result.backgroundColor = [UIColor clearColor];

result.textAlignment = NSTextAlignmentCenter;

[self.window addSubview:result];

[result release];

//Button 按钮

btn = [UIButton buttonWithType:(UIButtonTypeRoundedRect)];

btn.frame = CGRectMake(10, 130, 100, 30);

[btn setTitle:@"计算" forState:(UIControlStateNormal)];

[btn setTitle:@"[计算]" forState:UIControlStateHighlighted];

btn.tintColor = [UIColor orangeColor];

//给按钮添加事件

[btn addTarget:self

action:@selector(btnClick)

forControlEvents:(UIControlEventTouchUpInside)];

[self.window addSubview:btn];

//给按钮添加图片

[btn setBackgroundImage:[UIImage imageNamed:@"abc.png"]

forState:UIControlStateNormal];

[self.window makeKeyAndVisible];

return YES;

-(void)btnClick

{

int sum = 0;

sum = [tf1.text intValue] + [tf2.text intValue];

result.text = [NSString stringWithFormat:@"%d",sum];

}

UI编程步骤
1、将各种控件根据需要(是否要创建成全局变量)声明在.h文件中
2、@synthesize window = _window;
3、创建window CGRect r = CGRectMake(0, 0, 320, 508);//创建一个矩形
4、将矩形r赋值给window属性
//方式一 self.window = [[[UIWindow alloc]initWithFrame:r]autorelease];

   //方式二   UIWindow *aWin = [[UIWindow alloc]initWithFrame:r]; //aWin retainCount = 1

  /*
    iOS不支持多窗口
    iPhone4/4s 320*480像素
    iPhone5 320*508
    一个App的高度44*44