iOS－QQ好友列表 iOS 页面间几种传值方式（属性，代理，block，单例，通知）

主要是 点击按钮实现下拉 刷新数据

页面间传值

//
//  HMFriendsModel.h
//  QQ好友列表
//
//  Created by YaguangZhu on 15/9/1.
//  Copyright (c) 2015年 YaguangZhu. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface HMFriendsModel : NSObject

@property(nonatomic,copy) NSString *name;

@property(nonatomic,copy) NSString *icon;

@property(nonatomic,copy) NSString *intro;

@property(nonatomic,assign,getter=isVip) BOOL vip ;

- (instancetype)initWithDict:(NSDictionary *)dict;
+ (instancetype)friendsWithDict:(NSDictionary *)dict;
//+ (NSArray *)friends;

@end

//

//  HMFriendsModel.m

//  QQ好友列表

//

//  Created by YaguangZhu on 15/9/1.

//  Copyright (c) 2015年 YaguangZhu. All rights reserved.

//

#import "HMFriendsModel.h"

@implementation HMFriendsModel

- (instancetype)initWithDict:(NSDictionary *)dict

{

self = [super init];

if (self) {

[self setValuesForKeysWithDictionary:dict];

}

return self;

}

+ (instancetype)friendsWithDict:(NSDictionary *)dict

{

return [[self alloc] initWithDict:dict];

}

//+ (NSArray *)friends

//{

//    NSArray *array = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"friends.plist" ofType:nil]];

//    NSMutableArray *arrayM = [NSMutableArray array];

//    for (NSDictionary *dict in array) {

//        [arrayM addObject:[self friendsWithDict:dict]];

//    }

//

//    return arrayM;

//}

@end

//
//  HMFriendsGroupModel.h
//  QQ好友列表
//
//  Created by YaguangZhu on 15/9/1.
//  Copyright (c) 2015年 YaguangZhu. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface HMFriendsGroupModel : NSObject

@property(nonatomic,strong) NSArray *friends;

@property(nonatomic,copy) NSString *name;

@property(nonatomic,assign) BOOL open;

@property(nonatomic,assign) int online;

- (instancetype)initWithDict:(NSDictionary *)dict;
+ (instancetype)friendsGroupWithDict:(NSDictionary *)dict;
//+ (NSArray *)friendsModel;

@end

//
//  HMFriendsGroupModel.m
//  QQ好友列表
//
//  Created by YaguangZhu on 15/9/1.
//  Copyright (c) 2015年 YaguangZhu. All rights reserved.
//

#import "HMFriendsGroupModel.h"
#import "HMFriendsModel.h"
@implementation HMFriendsGroupModel

- (instancetype)initWithDict:(NSDictionary *)dict
{

    if (self = [super init]) {
        //注入所有值
        [self setValuesForKeysWithDictionary:dict];

        NSMutableArray *arr = [NSMutableArray array];
        for (NSDictionary *dict in self.friends) {
            HMFriendsModel *model = [HMFriendsModel friendsWithDict:dict];

            [arr addObject:model];

        }

        self.friends = arr;

    }
    return self;

//    self = [super init];
//    if (self) {
//        [self setValuesForKeysWithDictionary:dict];
//    }
//    return self;
}

+ (instancetype)friendsGroupWithDict:(NSDictionary *)dict
{
    return [[self alloc] initWithDict:dict];
}

//+ (NSArray *)friendsModel
//{
//    HMFriendsGroupModel *model =[[HMFriendsGroupModel alloc]init];
//    NSMutableArray *arrayM = [NSMutableArray array];
//
//            for (NSDictionary *dict in model.friends) {
//                HMFriendsModel *model = [HMFriendsModel friendsWithDict:dict];
//
//                [arrayM addObject:model];
//            }
//    model.friends =arrayM;
//
//    return arrayM;
//}

@end

//
//  HMHeaderView.h
//  QQ好友列表
//
//  Created by YaguangZhu on 15/9/5.
//  Copyright (c) 2015年 YaguangZhu. All rights reserved.
//

#import <UIKit/UIKit.h>
@class HMHeaderView;

typedef void(^HMHeaderViewBlock)(id);

@protocol HMHeaderViewDelegate <NSObject>

@optional
- (void)headerView:(HMHeaderView *)view;

@end

@class HMFriendsGroupModel;
@interface HMHeaderView : UITableViewHeaderFooterView

+ (instancetype)headerViewWith:(UITableView *)tableview;

@property (nonatomic, assign)id<HMHeaderViewDelegate> delegate;

@property (nonatomic, strong)HMFriendsGroupModel *group;

@property (nonatomic, copy)HMHeaderViewBlock block;

@end

//
//  HMHeaderView.m
//  QQ好友列表
//
//  Created by YaguangZhu on 15/9/5.
//  Copyright (c) 2015年 YaguangZhu. All rights reserved.
//

#import "HMHeaderView.h"
#import "HMFriendsGroupModel.h"
@interface HMHeaderView ()

@property (nonatomic, weak)UIButton *nameBtn;

@property (nonatomic, weak)UILabel *textLbl;

@end

@implementation HMHeaderView

+ (instancetype)headerViewWith:(UITableView *)tableview
{

    static NSString *ID = @"headerView";
    //首先看缓存池中是否存在headerView，如果存在的 直接取出来用
    HMHeaderView *header = [tableview dequeueReusableHeaderFooterViewWithIdentifier:ID];

    if (header == nil) {
        //如果不存在   重新创建一个
        header = [[HMHeaderView alloc]initWithReuseIdentifier:ID];
    }

    return header;
}

- (void)setGroup:(HMFriendsGroupModel *)group
{

    //1. 必须做的操作
    _group = group;

    [self.nameBtn setTitle:group.name forState:UIControlStateNormal];

    //显示在线人数
    self.textLbl.text = [NSString stringWithFormat:@"%d/%d",group.online,group.friends.count];

}

//  当headerview 上子控件只需 做一次操作的  或者  要显示出来的    就写在以下方法中
- (id)initWithReuseIdentifier:(NSString *)reuseIdentifier
{
    if (self = [super initWithReuseIdentifier:reuseIdentifier]) {

        // Custom  相当  [[UIButton alloc]init];
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
        //btn 上面有一个imageView
        [btn setImage:[UIImage imageNamed:@"buddy_header_arrow"] forState:UIControlStateNormal];
        [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        //设置按钮内容的居左显示
        btn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
        //设置按钮的内边距
        btn.contentEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
        //设置按钮 label 的 内边距
        btn.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
        //按钮内部 imageview 的内边距
        //        btn.imageEdgeInsets
        //居中显示
        btn.imageView.contentMode = UIViewContentModeCenter;

        //不予许剪切超出部分
        btn.imageView.clipsToBounds = NO;

        [btn addTarget:self action:@selector(nameBtnClick) forControlEvents:UIControlEventTouchUpInside];

        [self addSubview:btn];
        self.nameBtn = btn;

        NSLog(@"---------%@",NSStringFromCGRect(self.contentView.frame));

        UILabel *lable = [[UILabel alloc]init];

        //居右显示
        lable.textAlignment = NSTextAlignmentRight;

        [self.contentView addSubview:lable];

        self.textLbl = lable;

    }

    return self;
}

/**
 *  当 当前的view 的frame 发生一些改变的时候  调用次方法  重新布局  内部的子控件
 */
- (void)layoutSubviews
{
    self.nameBtn.frame = self.bounds;
    //获取屏幕的宽度
    //    CGFloat screenW = [[UIScreen mainScreen] bounds].size.width;

    CGFloat lblY = 0;
    CGFloat lblW = 150;
    CGFloat lblh = self.frame.size.height;
    CGFloat lblX = self.frame.size.width - lblW - 10;

    self.textLbl.frame = CGRectMake(lblX, lblY, lblW, lblh);

}

/**
 *  代理方法
 */
- (void)nameBtnClick
{
    self.group.open = !self.group.open;

//        if ([self.delegate respondsToSelector:@selector(headerView:)]) {
//            [self.delegate headerView:self];
//        }
//
//
//
//
//    if (self.block) {
//        self.block(self);
//    }

//
   [[NSNotificationCenter defaultCenter] postNotificationName:@"friend" object:self userInfo:nil];

    NSLog(@"----------------");
}

/**
 *  当 当前的view 加载到父控件的时候调用
 */
- (void)didMoveToSuperview
{

    //每次当控件加载到父控件的时候都会调用这个方法，包括init 完一次就会调用一次
    if (self.group.open) {
        self.nameBtn.imageView.transform = CGAffineTransformMakeRotation(M_PI_2);

        NSLog(@"999999999");

    }else{
        self.nameBtn.imageView.transform = CGAffineTransformMakeRotation(0);
    }

}

@end