IOS UI 第二篇：基本UI

1.UI书写：

一个小练习图片如下：

代码如下：

@implementation AppDelegate
{
    UIControl *control;
    UILabel *label;
}

    label = [[UILabel alloc] initWithFrame:CGRectMake(10, 50, 300, 50)];
    control = [[UIControl alloc] initWithFrame:CGRectMake(10, 50, 300, 50)];
    label.backgroundColor = [UIColor clearColor];
    label.text = @"按我呀、好爽！";
    label.textColor = [UIColor whiteColor];
    label.textAlignment = NSTextAlignmentCenter;
    label.font = [UIFont boldSystemFontOfSize:30];
    control.backgroundColor = [UIColor redColor];

[control addTarget:self action:@selector(onTouchDown:) forControlEvents:UIControlEventTouchDown];
   
    [control addTarget:self action:@selector(onTouchup:) forControlEvents:UIControlEventTouchUpInside];
    /*
     三个参数
     1、id调用哪个对象的方法
     2、sel调用上面对象里的这个方法
     3、controlevent 发生什么事件才调用上面传入的方法
     */
   
   
    [self.window addSubview:control];
    [self.window addSubview:label];
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

-(void)onTouchDown:(id)sender{
    NSLog(@"onTouchDown");
    control.backgroundColor = [UIColor greenColor];
    label.textColor = [UIColor blackColor];
}

-(void)onTouchup:(id)sender{
    NSLog(@"onTouchUp");
    control.backgroundColor = [UIColor redColor];
    label.textColor = [UIColor whiteColor];
}

Ps : 最近发现学IOS 应用是多么的有趣！

利用UIButton 实现同样点击功能

{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.

UIButton *button = [UIButton buttonWithType:UIButtonTypeInfoDark];
    button.frame = CGRectMake(10, 50, 300, 50);
    [button addTarget:self action:@selector(onButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
    button.backgroundColor = [UIColor greenColor];
    [self.window addSubview:button];
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

-(void)onButtonClicked:(id)sender{
    NSLog(@"按键被点击");
}

小练习 卖鸡蛋煎饼果子小应用，先用xib 把轮廓框架做出，之后用代码写功能实现 

图片：

实现代码如下：：

xib.m：

#import "Xib.h"

@interface Xib ()
@property (weak, nonatomic) IBOutlet UILabel *egg;
@property (weak, nonatomic) IBOutlet UILabel *bing;
@property (weak, nonatomic) IBOutlet UILabel *total;
@property (assign, nonatomic) int eggnumber;
@property (assign, nonatomic) int bingnumber;
@property (assign, nonatomic) CGFloat eggvalue;
@property (assign, nonatomic) CGFloat bingvalue;
@property (assign, nonatomic) CGFloat totalvalue;

@end

@implementation Xib

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        _totalvalue = 1.2;
        _eggvalue = 0;
        _bingvalue = 0;
        _eggnumber = 0;
        _bingnumber = 0;

}
    return self;
}
- (IBAction)Addegg:(id)sender {
    ++_eggnumber;
    _eggvalue = 1*_eggnumber;
    [_egg setText:[NSString stringWithFormat:@"%d鸡蛋--%.2lf元", _eggnumber, _eggvalue]];
    _totalvalue+=1;
    [_total setText:[NSString stringWithFormat:@"%.2lf元", _totalvalue]];
   
}

- (IBAction)Addbing:(id)sender {
    ++_bingnumber;
    _bingvalue = 1.5*_bingnumber;
    [_bing setText:[NSString stringWithFormat:@"%d煎饼--%.2lf元", _bingnumber, _bingvalue]];
    _totalvalue+=1.5;
    [_total setText:[NSString stringWithFormat:@"%.2lf元", _totalvalue]];
   
}
- (IBAction)Allupdate:(id)sender {
    _totalvalue = 1.2;
    _totalvalue = 1.2;
    _eggvalue = 0;
    _bingvalue = 0;
    _eggnumber = 0;
    _bingnumber = 0;
    [_egg setText:[NSString stringWithFormat:@"%d鸡蛋--%.2lf元", _eggnumber, _eggvalue]];
    [_bing setText:[NSString stringWithFormat:@"%d煎饼--%.2lf元", _bingnumber, _bingvalue]];
    [_total setText:[NSString stringWithFormat:@"%.2lf元", _totalvalue]];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [_total setText:[NSString stringWithFormat:@"%.2lf元", _totalvalue]];
    [_egg setText:[NSString stringWithFormat:@"%d鸡蛋--%.2lf元", _eggnumber, _eggvalue]];
    [_bing setText:[NSString stringWithFormat:@"%d煎饼--%.2lf元", _bingnumber, _bingvalue]];
    // Do any additional setup after loading the view from its nib.
}

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

@end

PS: 写完代码才发现，其实可以封装一下  方法，不要写太多重复代码，封装到一个函数，调用就可以了。上面代码我得封装性太差了。而且未重复利用。

QQ底栏练习，下面四个图片被点击会出现被选择的效果：

代码如下：

#import "Xib.h"

@interface Xib ()
@property (weak, nonatomic) IBOutlet UIButton *button1;
@property (weak, nonatomic) IBOutlet UIButton *button2;
@property (weak, nonatomic) IBOutlet UIButton *button3;
@property (weak, nonatomic) IBOutlet UIButton *button4;

@end

@implementation Xib
- (IBAction)selected_one:(id)sender {
    _button1.selected = NO;
    _button2.selected = NO;
    _button3.selected = NO;
    _button4.selected = NO;

UIButton *btn = sender;
    btn.selected = YES;
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

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

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

@end

微信小练习：点击会输入语音，如第一张图片，如果松手显示发送成功，如果上滑后松手会显示发送失败。

如图片效果

代码如下：

#import "Xib.h"

@interface Xib ()
@property (weak, nonatomic) IBOutlet UILabel *pic;
@property (weak, nonatomic) IBOutlet UILabel *label_1;
@property (weak, nonatomic) IBOutlet UILabel *label_2;
@property (weak, nonatomic) IBOutlet UIButton *button;

@end

@implementation Xib

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        [_pic setHidden:YES];
    }
    return self;
}
- (IBAction)Recoder:(id)sender {
   
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self begin];
    // Do any additional setup after loading the view from its nib.
}

-(void)begin{
    [_pic setHidden:YES];
    [_label_1 setHidden:YES];
    [_label_2 setHidden:YES];
   
    [_button addTarget:self action:@selector(onButtonClicked:) forControlEvents:UIControlEventTouchDown];

[_button addTarget:self action:@selector(onButtonClick:) forControlEvents:UIControlEventTouchUpInside];

[_button addTarget:self action:@selector(onButtonClickup:) forControlEvents:UIControlEventTouchDragOutside];
    [_button addTarget:self action:@selector(onButtonClickupa:) forControlEvents:UIControlEventTouchUpOutside];
   
    [_button addTarget:self action:@selector(onButtonClickupb:) forControlEvents:UIControlEventTouchDragInside];
}

-(void)onButtonClicked:(id)sender{
    [_pic setHidden:NO];
    [_label_1 setHidden:NO];
    [_label_2 setHidden:NO];
    _label_2.text = @"上滑取消发送";
    [_button setTitle:@"松手取消" forState:UIControlStateHighlighted];
   
}

-(void)onButtonClick:(id)sender{
    [_pic setHidden:NO];
    [_label_1 setHidden:YES];
    [_label_2 setHidden:NO];
    _label_2.text = @"发送成功";
    [_button setTitle:@"点击录音" forState:UIControlStateHighlighted];

}

-(void)onButtonClickup:(id)sender{
    [_pic setHidden:NO];
    [_label_1 setHidden:YES];
    [_label_2 setHidden:NO];
    _label_2.text = @"松手取消";
    [_button setTitle:@"松手发送" forState:UIControlStateHighlighted];
}

-(void)onButtonClickupa:(id)sender{
    [_pic setHidden:NO];
    [_label_1 setHidden:YES];
    [_label_2 setHidden:NO];
    _label_2.text = @"取消成功";
    [_button setTitle:@"松手取消" forState:UIControlStateHighlighted];

}

-(void)onButtonClickupb:(id)sender{
    [_pic setHidden:NO];
    [_label_1 setHidden:YES];
    [_label_2 setHidden:NO];
    _label_2.text = @"松手发送";
    [_button setTitle:@"松手发送" forState:UIControlStateHighlighted];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.
    [self begin];
}

@end

按钮应用，通过一个按钮控制其他按钮的反应。也可以控制按钮的几个action

例子：

图片：

代码：

#import "AppDelegate.h"

@implementation AppDelegate
{
    UIButton *customButton;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.

UIButton *button = [UIButton buttonWithType:UIButtonTypeInfoDark];
    button.frame = CGRectMake(10, 50, 300, 50);

[button addTarget:self action:@selector(onButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
   
    [button addTarget:self action:@selector(onButtondown:) forControlEvents:UIControlEventTouchDown];
    button.backgroundColor = [UIColor greenColor];
   
    customButton = [UIButton buttonWithType:UIButtonTypeCustom];
    customButton.frame = CGRectMake(10, 100, 300, 50);
    //customButton.backgroundColor = [UIColor blueColor];
    //customButton.titleLabel.text = @"xxx";
    //customButton.titleLabel.textColor = [UIColor blackColor];
   
    [customButton setTitle:@"nonal" forState:UIControlStateNormal];
    [customButton setTitle:@"HIGHnonal" forState:UIControlStateHighlighted];
    [customButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [customButton setTitleColor:[UIColor blackColor] forState:UIControlStateHighlighted];

UIImage *imageNor = [UIImage imageNamed:@"pic1.png"];
    UIImage *imagePre = [UIImage imageNamed:@"pic2.png"];
   
    [customButton setBackgroundImage:imageNor forState:UIControlStateNormal];
    [customButton setBackgroundImage:imagePre forState:UIControlStateHighlighted];

// [customButton addTarget:self action:@selector(onButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
   
    [self.window addSubview:customButton];
    [self.window addSubview:button];
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

-(void)onButtonClicked:(id)sender{
    NSLog(@"按键被点击");
    customButton.highlighted = NO;
    [customButton setTitle:@"nonal" forState:UIControlStateNormal];
}

-(void)onButtondown:(id)sender{
    customButton.highlighted = YES;
}

高亮和被选择的区别： 高亮是点击鼠标没有放开的时，被选择是鼠标点击松手之后。