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| #import "ViewController.h"
@interface ViewController ()
//控件
@property (nonatomic,strong) UILabel *noLabel;
@property (nonatomic,strong) UIImageView *iconImage;
@property (nonatomic,strong) UILabel *descLabel;
@property (nonatomic,strong) UIButton *leftButton;
@property (nonatomic, strong) UIButton *rightButton;
//当前照片的索引
@property (nonatomic,assign) int index;
//图片信息的数组
@property (nonatomic,strong) NSArray *imageList;
@end
@implementation ViewController
//懒加载，给图片复制
- (NSArray *)imageList
{
NSLog(@"读取图像信息");
if (_imageList == nil) {
NSLog(@"实例化数组");
// "包" Bundle [NSBundle mainBundle]编译安装之后对应的程序包
NSString *path = [[NSBundle mainBundle] pathForResource:@"ImageList" ofType:@"plist"];
NSLog(@"%@", path);
// 在OC中ContentsOfFile，通常需要完整的路径
_imageList = [NSArray arrayWithContentsOfFile:path];
NSLog(@"%@", _imageList);
}
return _imageList;
}
//noLabel
- (UILabel *)noLabel
{
if (_noLabel==nil)
{
UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(0, 20, self.view.bounds.size.width, 40)];
_noLabel=label;
_noLabel.textAlignment=NSTextAlignmentCenter;
[self.view addSubview:_noLabel];
}
return _noLabel;
}
//iconImage
- (UIImageView *)iconImage
{
if (_iconImage==nil) {
CGFloat imageW=200;
CGFloat imageH=200;
CGFloat imageX=(self.view.bounds.size.width-imageW)*0.5;
CGFloat imageY=CGRectGetMaxY(self.noLabel.frame)+20;
_iconImage= [[UIImageView alloc] initWithFrame:CGRectMake(imageX, imageY, imageW, imageH)];
[self.view addSubview:_iconImage];
}
return _iconImage;
}
//dessLabel
- (UILabel *)descLabel
{
if (_descLabel == nil) {
CGFloat descY = CGRectGetMaxY(self.iconImage.frame);
_descLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, descY, self.view.bounds.size.width, 100)];
_descLabel.textAlignment = NSTextAlignmentCenter;
// 需要Label具有“足够的高度”，不限制显示的行数
_descLabel.numberOfLines = 0;
[self.view addSubview:_descLabel];
}
return _descLabel;
}
- (UIButton *)leftButton
{
if (_leftButton == nil) {
_leftButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
CGFloat centerY = self.iconImage.center.y;
CGFloat centerX = self.iconImage.frame.origin.x * 0.5;
_leftButton.center = CGPointMake(centerX, centerY);
[_leftButton setBackgroundImage:[UIImage imageNamed:@"left_normal"] forState:UIControlStateNormal];
[_leftButton setBackgroundImage:[UIImage imageNamed:@"left_highlighted"] forState:UIControlStateHighlighted];
[self.view addSubview:_leftButton];
_leftButton.tag = -1;
[_leftButton addTarget:self action:@selector(clickButton:) forControlEvents:UIControlEventTouchUpInside];
}
return _leftButton;
}
- (UIButton *)rightButton
{
if (_rightButton == nil) {
_rightButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
CGFloat centerY = self.iconImage.center.y;
CGFloat centerX = self.iconImage.frame.origin.x * 0.5;
_rightButton.center = CGPointMake(self.view.bounds.size.width - centerX, centerY);
[_rightButton setBackgroundImage:[UIImage imageNamed:@"right_normal"] forState:UIControlStateNormal];
[_rightButton setBackgroundImage:[UIImage imageNamed:@"right_highlighted"] forState:UIControlStateHighlighted];
[self.view addSubview:_rightButton];
_rightButton.tag = 1;
[_rightButton addTarget:self action:@selector(clickButton:) forControlEvents:UIControlEventTouchUpInside];
}
return _rightButton;
}
/** 在viewDidLoad创建界面 */
- (void)viewDidLoad
{
[super viewDidLoad];
// [self.view addSubview:self.noLabel];
// 显示照片信息
[self showPhotoInfo];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
/**
重构的目的：让相同的代码只出现一次
*/
- (void)showPhotoInfo
{
// 设置序号
self.noLabel.text = [NSString stringWithFormat:@"%d/%d", self.index + 1, 5];
// 效率不高，每次都会生成数组
// 如何解决？使用属性记录字典数组
// NSDictionary *dict1 = @{@"name": @"biaoqingdi", @"desc": @"表情1"};
// NSDictionary *dict2 = @{@"name": @"bingli", @"desc": @"病例1"};
// NSDictionary *dict3 = @{@"name": @"chiniupa", @"desc": @"吃牛扒1"};
// NSDictionary *dict4 = @{@"name": @"danteng", @"desc": @"蛋疼1"};
// NSDictionary *dict5 = @{@"name": @"wangba", @"desc": @"网吧1"};
// NSArray *array = @[dict1, dict2, dict3, dict4, dict5];
// 设置图像和描述
self.iconImage.image = [UIImage imageNamed:self.imageList[self.index][@"name"]];
self.descLabel.text = self.imageList[self.index][@"desc"];
self.rightButton.enabled = (self.index != 4);
self.leftButton.enabled = (self.index != 0);
}
// 在OC中，很多方法的第一个参数，都是触发该方法的对象！
- (void)clickButton:(UIButton *)button
{
// 根据按钮调整当前显示图片的索引?
self.index += button.tag;
[self showPhotoInfo];
}
@end
|
