2016/07/11
//
// ViewController.m
// UI按钮交互功能
//
// Created by lanou on 16/7/11.
// Copyright © 2016年yhy. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
//标题标签
@property(nonatomic,strong)UILabel *titleLable;
//左边按钮
@property(nonatomic,strong)UIButton *leftBtn;
//右边按钮
@property(nonatomic,strong)UIButton *rightBtn;
//显示图片
@property(nonatomic,strong)UIImageView *myImageView;
//给存入的四张图片定义一个数组
@property(nonatomic,strong)NSArray *imageNames;
@end
@implementation ViewController
//视图加载好时会自动调用
- (void)viewDidLoad {
[super viewDidLoad];
//创建并初始化标签
self.titleLable = [[UILabel alloc]initWithFrame:CGRectMake(100, 50, 150, 30)];
//写入标签文本
self.titleLable.text = @"biaoqingdi";
//设置标签文本的背景颜色为红色
self.titleLable.backgroundColor = [UIColor greenColor];
//设置标签文本在框中居中对齐
self.titleLable.textAlignment = NSTextAlignmentCenter;
//添加标签到视图上
[self.view addSubview:self.titleLable];
//创建并初始化定义（坐标、宽高）相框
self.myImageView = [[UIImageView alloc]initWithFrame:CGRectMake(85, 100, 200, 200)];
//将图片保存在名为image中（根据图片地址名加载图片）
UIImage *image = [UIImage imageNamed:@"biaoqingdi"];
//显示图片
self.myImageView.image = image;
//添加相框到视图中
[self.view addSubview:_myImageView];
//创建并初始化定义（坐标、宽高）左按钮
self.leftBtn = [[UIButton alloc]initWithFrame:CGRectMake(20, 150, 45, 45)];
//关闭左按钮的交互
self.leftBtn.userInteractionEnabled = NO;
//将左按钮的图片保存在名为leftImage中（根据图片地址名加载图片）
UIImage *leftImage = [UIImage imageNamed: @"left_disable"];
//设置左按钮的背景图片（在正常状态下）
[self.leftBtn setBackgroundImage:leftImage forState:(UIControlStateNormal)];
//添加左按钮到视图上
[self.view addSubview: _leftBtn];
//创建并初始化定义（坐标、宽高）右按钮
self.rightBtn = [[UIButton alloc]initWithFrame:CGRectMake(305, 150, 45, 45)];
//将右按钮的图片保存在名为rightImage中（根据图片地址名加载图片）
UIImage *rightImage = [UIImage imageNamed: @"right_normal"];
//设置右按钮的背景图片（在正常状态下）
[self.rightBtn setBackgroundImage:rightImage forState:(UIControlStateNormal)];
//添加右按钮在视图上
[self.view addSubview:_rightBtn];
//右按钮监听
[self.rightBtn addTarget:self action:@selector(rightBtnAction) forControlEvents:(UIControlEventTouchUpInside)];
//左按钮监听
[self.leftBtn addTarget:self action:@selector(leftBtnAction) forControlEvents:(UIControlEventTouchUpInside)];
}
//右按钮
-(void)rightBtnAction{
//切换图片 图片为png格式则不用加后缀名 其他格式需要加后缀
self.imageNames = @[ @"biaoqingdi",@"bingli",@"chiniupa",@"danteng",@"wangba"];
//获取当前是第几张图片（整型变量）
NSInteger index = [self.imageNames indexOfObject:self.titleLable.text];
//把按钮图片加载成灰色（正常状态下状态）
//不是为最后一张才切换到下一张
if (index < 4) {
//如果index=3（即图片从第四张切换到，第五张时）
if (index == 3) {
//关闭右按钮交互（右按钮图片变为灰色）
self.rightBtn.userInteractionEnabled = NO;
//将右按钮灰色图片保存在image中（根据名字加载图片）
UIImage *image =[UIImage imageNamed:@"right_disable"];
//将右按钮状态为一般（正常）状态下的背景图片设置成为image中图像
[self.rightBtn setBackgroundImage:image forState:(UIControlStateNormal)];
}
else{
//否则（图片为第1,2,3张时）
//将两个按钮正常状态下的背景图片设置为黑色图片
[self.rightBtn setBackgroundImage:[UIImage imageNamed:@"right_normal"] forState:(UIControlStateNormal)];
[self.leftBtn setBackgroundImage:[UIImage imageNamed:@"left_normal"] forState:(UIControlStateNormal)];
//开启两个按钮的交互
self.rightBtn.userInteractionEnabled = YES;
self.leftBtn.userInteractionEnabled = YES;
}
//将标签titleLable内容切换到下一张图片的标签内容
NSString *nextTitle = self.imageNames[index+1];
self.titleLable.text = nextTitle;
//将图片切换到下一张
self.myImageView.image = [UIImage imageNamed: nextTitle];
}
}
//左按钮
-(void)leftBtnAction{
//切换图片 图片为png格式则不用加后缀名 其他格式需要加后缀
self.imageNames = @[ @"biaoqingdi",@"bingli",@"chiniupa",@"danteng",@"wangba"];
//获取当前是第几张图片（整型）
NSInteger index = [self.imageNames indexOfObject:self.titleLable.text];
//不是为第一张才切换到上一张
if (index > 0) {
//第二张切换到第一张时
if (index == 1) {
//左边按钮交互关闭（左按钮图片变为灰色）
self.leftBtn.userInteractionEnabled = NO;
//将左按钮灰色图片保存在image中（根据名字加载图片）
UIImage *image =[UIImage imageNamed:@"left_disable"];
//将左按钮状态为一般（正常）状态下的背景图片设置成为image中图像
[self.leftBtn setBackgroundImage:image forState:(UIControlStateNormal)];
}
else{
//否则（图片为第3,4,5张时）
//将两个按钮正常状态下的背景图片设置为黑色图片
[self.rightBtn setBackgroundImage:[UIImage imageNamed:@"right_normal"] forState:(UIControlStateNormal)];
[self.leftBtn setBackgroundImage:[UIImage imageNamed:@"left_normal"] forState:(UIControlStateNormal)];
//开启两个按钮的交互
self.rightBtn.userInteractionEnabled = YES;
self.leftBtn.userInteractionEnabled = YES;
}
//将标签titleLable内容切换到上一张图片的标签内容
NSString *preTitle =self.imageNames[index-1];
self.titleLable.text = preTitle;
//将图片切换到上一张
self.myImageView.image = [UIImage imageNamed: preTitle];
}
}
-(void)demo{
//按钮UIButton
// UIButton *button = [UIButton buttonWithType: UIButtonTypeContactAdd];
//创建并初始化定义（坐标、宽高）按钮
UIButton *button = [[UIButton alloc]initWithFrame:CGRectMake(50, 50, 80, 80)];
// frame表明了空间的坐标和宽高(CGRect类型)
[button setTitle:@"眼镜哥" forState:UIControlEventTouchDown];
//设置按钮背景色为红色
button.backgroundColor = [UIColor redColor];
//根据名字加载图片
UIImage *image = [UIImage imageNamed:@"right_normal"];
//给按钮设置背景图片
[button setBackgroundImage:image forState:UIControlStateNormal];
//按钮的监听
[button addTarget:self action:@selector(btnClickLister) forControlEvents:UIControlEventTouchUpOutside];
//添加到屏幕上面
[self.view addSubview:button];
//相框UIImageView
//创建并初始化视图相框
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(150, 50, 200, 200)];
UIImage *image1 = [UIImage imageNamed:@"biaoqingdi"];
//设置imageView显示的图片
imageView.image = image1;
[self.view addSubview:imageView];
//标签UIlable
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(150, 270, 150, 30)];
//设置标签的文本
label.text = @"表情弟";
//设置居中方式（注：是将文本在标签框内部居中）
label.textAlignment = NSTextAlignmentCenter;
//设置标签的颜色为红色
label.textColor = [UIColor redColor];
//将标签显示在视图屏幕上
[self.view addSubview:label];
}
//方法调用
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
//调用按钮监听的方法
-(void)btnClickLister{
//在视图屏幕中执行按钮操作时，代码工程中将会打印“click btn”
NSLog(@"click btn");
}
@end
