自定义UIView UITableViewCell等控件

一、自定义NavigationController导航栏

eg.

CZNavController.h

#import <UIKit/UIKit.h>

@interface CZNavController : UINavigationController

@end

CZNavController.m

#import "CZNavController.h"
#import "UIImage+Ex.h"
@interface CZNavController ()

@end

@implementation CZNavController

//此方法，会在CZNavController当前类，执行第一个方法之前先会执行一次，并且只会调用一次
+ (void)initialize{
    //设置导航条的样式
    UINavigationBar *navBar = [UINavigationBar appearance];
    //UIBarMetricsDefault  背景图片 在横竖屏都显示
    [navBar setBackgroundImage:[UIImage imageNamed:@"NavBar64"] forBarMetrics:UIBarMetricsDefault];
    //设置标题的颜色
    [navBar  setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor  whiteColor]}];
}

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

//重写导航控制器的push方法，每一个子控制器在跳转的时候都会调用此方法
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
//viewController  就是子控制器，设置子控制器的自定义后退按钮
    
    //1  自定义后退按钮
    UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithImage:[[UIImage imageNamed:@"NavBack"] originalImage] style:UIBarButtonItemStylePlain target:self action:@selector(backClick)];
    
    //
    UIBarButtonItem *fixedItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    fixedItem.width = -10;
    
    viewController.navigationItem.leftBarButtonItems = @[fixedItem,backItem];
    
    //自定义后退按钮后，手势返回上一级控制器的功能恢复
    self.interactivePopGestureRecognizer.delegate = nil;

    //当push的时候隐藏tabBar
    viewController.hidesBottomBarWhenPushed = YES;
    
    //真正的做了控制器之间的跳转
    [super pushViewController:viewController animated:animated];
}
- (void)backClick{
    [self popViewControllerAnimated:YES];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

三、自定义UIButton

eg.

CZWheelButton.h

#import <UIKit/UIKit.h>

@interface CZWheelButton : UIButton
@property (nonatomic, assign) CGFloat imgW;
@property (nonatomic, assign) CGFloat imgH;

+ (instancetype)wheelButton:(CGFloat)imgW imgH:(CGFloat)imgH;

@end

CZWheelButton.m

#import "CZWheelButton.h"

@implementation CZWheelButton

//设置imageView的大小和位置
//- (void)layoutSubviews{
//    [super layoutSubviews];
//    
//}

- (void)setHighlighted:(BOOL)highlighted{

}

//快速创建自定义button的对象。并且传递按钮中imageView的大小
+ (instancetype)wheelButton:(CGFloat)imgW imgH:(CGFloat)imgH{
CZWheelButton *btn = [CZWheelButton new];
btn.imgW = imgW;
btn.imgH = imgH;

return btn;
}

//返回按钮中imageView的frame
- (CGRect)imageRectForContentRect:(CGRect)contentRect{
CGFloat x = (contentRect.size.width - self.imgW) * 0.5;
CGFloat y = 20;

return CGRectMake(x, y, self.imgW, self.imgH);
}

//返回按钮中titleLabel的frame
//- (CGRect)titleRectForContentRect:(CGRect)contentRect{
//
//}


@end

四、自定义UITableViewCell

eg.

CZItemCell.h

#import <UIKit/UIKit.h>

@class CZItem;
@interface CZItemCell : UITableViewCell
//创建一个可重用的自定义cell
+ (instancetype)cellWithTableView:(UITableView *)tableView;

@property (nonatomic, strong) CZItem *item;
@end

CZItemCell.m

#import "CZItemCell.h"
#import "CZItem.h"
#import "CZItemArrow.h"
#import "CZItemSwitch.h"
@implementation CZItemCell
//1 创建一个可重用的自定义cell
+ (instancetype)cellWithTableView:(UITableView *)tableView{
    static NSString *reuseId = @"item";
    CZItemCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseId];
    if (cell == nil) {
        cell = [[self alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseId];
    }
    return cell;
}


//2
- (void)setItem:(CZItem *)item{
    _item = item;
    self.textLabel.text = item.title;
    if (item.icon) {
        self.imageView.image = [UIImage imageNamed:item.icon];
    }
    
    //判断当前的模型是箭头还是开关
    if ([item isKindOfClass:[CZItemArrow class]]) {
        //设置箭头
        //        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
        
        self.accessoryView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"CellArrow"]];
    }else if([item isKindOfClass:[CZItemSwitch class]]){
        //不允许cell选中
        self.selectionStyle = UITableViewCellSelectionStyleNone;
        self.accessoryView = [UISwitch new];
    }else{
        
        self.accessoryView = nil;
    }

}
@end

今日最深感悟：
要学会 提取父类，学会很好使用继承