Day10

1 delegate 代理

  

@protocol AppInfoViewClassDelegate <NSObject>

-(void)appInfoViewDownLoad:(AppInfoViewClass *)appInfoView;

@end


@property (nonatomic,weak) id<AppInfoViewClassDelegate> delegate; 


 if ([self.delegate respondsToSelector:@selector(appInfoViewDownLoad:)]) {
        [self.delegate appInfoViewDownLoad:self];
    }

实践中怎么调用可参考

//
//  AppInfoViewClass.h
//  AppManager2
//
//  Created by xin on 15-3-19.
//  Copyright (c) 2015年 Jackey. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "AppObject.h"
@class AppInfoViewClass;

@protocol AppInfoViewClassDelegate <NSObject>

-(void)appInfoViewDownLoad:(AppInfoViewClass *)appInfoView;

@end


@interface AppInfoViewClass : UIView

@property (nonatomic,weak) id<AppInfoViewClassDelegate> delegate; 

//@property (weak, nonatomic) IBOutlet UIButton *downloadBtn;

@property (nonatomic,strong) AppObject *appObject;

+(instancetype)initAppInfoViewWithDict:(AppObject *)appObject;

@end

　　

//
//  AppInfoViewClass.m
//  AppManager2
//
//  Created by xin on 15-3-19.
//  Copyright (c) 2015年 Jackey. All rights reserved.
//

#import "AppInfoViewClass.h"

@interface AppInfoViewClass()
@property (weak, nonatomic) IBOutlet UIImageView *iconView;
@property (weak, nonatomic) IBOutlet UILabel *descriptionLabel;

@end

@implementation AppInfoViewClass

-(void)setAppObject:(AppObject *)appObject{
    _appObject = appObject;
    self.iconView.image = appObject.image;
    self.descriptionLabel.text = appObject.iconDescription;
}

+(instancetype)getXibView{
    NSArray *appArray = [[NSBundle mainBundle]loadNibNamed:@"AppInfoView" owner:nil options:nil];
    return [appArray firstObject];
}

+(instancetype)initAppInfoViewWithDict:(AppObject *)appObject{
    AppInfoViewClass *view = [self getXibView];
    view.appObject = appObject;
    return view;
}

- (IBAction)downloadClick {
    //让代理办事
    if ([self.delegate respondsToSelector:@selector(appInfoViewDownLoad:)]) {
        [self.delegate appInfoViewDownLoad:self];
    }
}




@end

　　

//
//  ViewController.m
//  AppManager2
//
//  Created by xin on 15-3-18.
//  Copyright (c) 2015年 Jackey. All rights reserved.
//

#import "ViewController.h"
#import "AppObject.h"
#import "AppInfoViewClass.h"

@interface ViewController ()<AppInfoViewClassDelegate>

@property (nonatomic,strong) NSArray *appList;

@end

@implementation ViewController

-(NSArray *)appList{
    if(!_appList){
        NSString *path = [[NSBundle mainBundle]pathForResource:@"app.plist" ofType:nil];
        NSArray *array = [[NSArray alloc]initWithContentsOfFile:path];
        NSMutableArray *arrayM = [NSMutableArray array];
        for (NSDictionary *dict in array) {
            AppObject *appObject = [[AppObject alloc]initWithDict:dict];
            [arrayM addObject:appObject];
        }
        _appList = arrayM;
    }
    return _appList;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    int totalColumn = 3;
    CGFloat viewW = 80;
    CGFloat viewH = 90;
    
    CGFloat marginX = ((self.view.bounds.size.width - viewW * totalColumn) / (totalColumn + 1));
    CGFloat marginY = 10;
    CGFloat ViewY = 20;

    
    for (int i=0; i<self.appList.count; i++) {
        
        
        //绘制view
        //1 2 3 4 5 6
        CGFloat row = i / totalColumn;
        CGFloat col = i % totalColumn;
        
        CGFloat x = (viewW + marginX) * col + marginX;
        CGFloat y = (viewH + marginY) * row + marginY + ViewY;
        
        AppInfoViewClass *view = [AppInfoViewClass initAppInfoViewWithDict:self.appList[i]];
        view.delegate = self;
        view.frame = CGRectMake(x, y, viewW, viewH);
        [self.view addSubview:view];
        
        
    }
    
}

-(void)appInfoViewDownLoad:(AppInfoViewClass *)appInfoView{
    
    UILabel *alertLabel = [[UILabel alloc]initWithFrame:CGRectMake(80, 400, 160, 40)];
    alertLabel.text =appInfoView.appObject.iconDescription;
    alertLabel.textAlignment = NSTextAlignmentCenter;
    alertLabel.backgroundColor = [UIColor grayColor];
    [self.view addSubview:alertLabel];
    alertLabel.alpha = 1.0;
    
    [UIView animateWithDuration:1.0 animations:^{
        alertLabel.alpha = 0.0;
    } completion:^(BOOL finished) {
        [alertLabel removeFromSuperview];
    }];

}
@end