（重寫init方法，讓后面攜帶需要傳入的數(shù)據(jù)，然后在對界面初始化，使用這種方法必須要在初始化前就已經有數(shù)據(jù)了比較適合）
[objc]?view plain?copy
#import???
@interface?CustomView?:?UIView??
//?需要注意必須在?（.h）對方法進行聲明?在外部創(chuàng)建這個類的時候才能看到??
-?(instancetype)initWithFrame:(CGRect)frame?withInformation:(NSDictionary?*)dict;??
@end??
[objc]?view plain?copy
#import?"CustomView.h"??
@implementation?CustomView??
-?(instancetype)initWithFrame:(CGRect)frame?withInformation:(NSDictionary?*)dict??
{??
self?=?[super?initWithFrame:frame];??
if?(self)?{??
//?進行頁面配置，直接可以拿到自己想要的數(shù)據(jù)通過字典??
????}??
return?self;??
}??
@end??
[objc]?view plain?copy
-?(void)initUserInterface??
{??
NSDictionary?*dict?=?[NSDictionary?dictionary];??
//?調用init自定義方法?傳入數(shù)據(jù)??
CustomView?*customView?=?[[CustomView?alloc]initWithFrame:self.view.bounds?withInformation:dict];??
[self.view?addSubview:customView];??
}??
?（屬性傳值比較合適界面是先初始化的，而數(shù)據(jù)在界面初始化之后才拿到的，當想要對界面的元素的內容進行更新，直接通過屬性拿到對應的元素進行更改比較方便。特別是做數(shù)據(jù)請求用tableView來展示的時候，請求數(shù)據(jù)和頁面創(chuàng)建同步進行，所以用init傳請求數(shù)據(jù)必然會是空，那么就需要在數(shù)據(jù)請求成功用，在把界面元素就行刷新，而cell也是自定義的，最好把需要更新的控件定義成屬性就好對數(shù)據(jù)進行刷新處理了）
[objc]?view plain?copy
#import???
@interface?CustomView?:?UIView??
@property?(nonatomic,retain)UILabel?*label;??
@end??
[objc]?view plain?copy
#import?"CustomView.h"??
@implementation?CustomView??
-?(instancetype)initWithFrame:(CGRect)frame??
{??
self?=?[super?initWithFrame:frame];??
if?(self)?{??
_label?=?[[UILabel?alloc]init];??
_label.text?=?@"屬性傳值";??
[self?addSubview:_label];??
????}??
return?self;??
}??
@end??
[objc]?view plain?copy
#import?"ViewController.h"??
#import?"CustomView.h"??
@interface?ViewController?()??
@end??
@implementation?ViewController??
-?(void)viewDidLoad?{??
[super?viewDidLoad];??
[self?initUserInterface];??
}??
-?(void)initUserInterface??
{??
CustomView?*customView?=?[[CustomView?alloc]initWithFrame:self.view.bounds];??
//?拿到它的屬性?進行我們需要的操作??
customView.label.text?=?@"修改顯示數(shù)據(jù)";??
[self.view?addSubview:customView];??
}??
@end??
?（方法參數(shù)傳值也很適合對界面元素更新使用，當想要讓封裝好的一個TableView刷新請求回來數(shù)據(jù)時，通過調用封裝的這個方法傳入數(shù)據(jù)就可以刷新界面數(shù)據(jù)）
（比較適合兩個界面直接的逆向傳值__>也是類似實現(xiàn)系統(tǒng)的代理方法，當某個封裝好的類，定義一個自己的代理，當這個類里觸發(fā)的某個事件需要把數(shù)據(jù)傳出去，就在協(xié)議里定義一個方法，當遵守這個協(xié)議的實例調用這個方法就可以訪問后面攜帶的參數(shù)）
以下是簡單封裝的一個view來做例子說明 ?分別是封裝的.h ?.m ?文件
[objc]?view plain?copy
#import???
@protocol?CustomViewDelegate???
//?delegate?必須實現(xiàn)的方法??
@required??
-?(void)sendInformation:(NSInteger)tag;??
//?delegate?選擇實現(xiàn)的方法??
@optional??
@end??
@interface?CustomView?:?UIView??
@property?(nonatomic,assign)id??delegate;??
@end??
[objc]?view plain?copy
#import?"CustomView.h"??
@implementation?CustomView??
-?(instancetype)initWithFrame:(CGRect)frame??
{??
self?=?[super?initWithFrame:frame];??
if?(self)?{??
UIButton?*button?=?[UIButton?buttonWithType:UIButtonTypeSystem];??
button.tag?=?111;??
[button?addTarget:self?action:@selector(buttonPressed:)?forControlEvents:UIControlEventTouchUpInside];??
[self?addSubview:button];??
????}??
return?self;??
}??
-?(void)buttonPressed:(UIButton?*)sender??
{??
[self.delegate?sendInformation:sender.tag];??
}??
@end??
主頁面顯示VC
[objc]?view plain?copy
#import?"ViewController.h"??
#import?"CustomView.h"??
@interface?ViewController?()??
@end??
@implementation?ViewController??
-?(void)viewDidLoad?{??
[super?viewDidLoad];??
[self?initUserInterface];??
}??
-?(void)initUserInterface??
{??
CustomView?*customView?=?[[CustomView?alloc]initWithFrame:self.view.bounds];??
//?創(chuàng)建實例給他代理??
customView.delegate?=?self;??
[self.view?addSubview:customView];??
}??
#pragma?mark?-?CustomViewDelegate??
-?(void)sendInformation:(NSInteger)tag??
{??
//?當觸發(fā)button事件的時候，就會調用這個方法，把數(shù)據(jù)傳過來，類比于tableView?點擊的了對應的行就會走代理的方法??
NSLog(@"%ld",tag);??
}??
-?(void)didReceiveMemoryWarning?{??
[super?didReceiveMemoryWarning];??
//?Dispose?of?any?resources?that?can?be?recreated.??
}??
@end??
?（使用單例一般比較時候存儲用戶信息之類的，方便數(shù)據(jù)訪問或其他時候數(shù)據(jù)隨時調用）
?（當需要夸多層次的頁面進行數(shù)據(jù)傳送的時候，注冊通知來實現(xiàn)是比較方便的，而且使用起來也是非常簡單）
[objc]?view plain?copy
#import?"ViewController.h"??
#import?"CustomView.h"??
@interface?ViewController?()??
-?(void)getInformation:(NSNotification?*)noti;??
@end??
@implementation?ViewController??
-?(void)viewDidLoad?{??
[super?viewDidLoad];??
[self?initUserInterface];??
}??
-?(void)initUserInterface??
{??
[[NSNotificationCenter?defaultCenter]?addObserver:self?selector:@selector(getInformation:)?name:@"sendData"?object:nil];??
}??
#pragma?mark?-?NSNotificationCenter?methods??
//?發(fā)送通知后，就會走這個方法??
-?(void)getInformation:(NSNotification?*)noti??
{??
/****************???Notifications???****************/??
/*
????@interface?NSNotification?:?NSObject?
????@property?(readonly,?copy)?NSString?*name;
????@property?(readonly,?retain)?id?object;
????@property?(readonly,?copy)?NSDictionary?*userInfo;
????*/??
//?把傳過來的數(shù)據(jù)進行打印??
NSLog(@"%@",noti.object);?//?直接用點屬性獲取傳送過來的數(shù)據(jù)即可??
}??
@end??
[objc]?view plain?copy
#import?"CustomView.h"??
@implementation?CustomView??
-?(instancetype)initWithFrame:(CGRect)frame??
{??
self?=?[super?initWithFrame:frame];??
if?(self)?{??
UIButton?*button?=?[UIButton?buttonWithType:UIButtonTypeSystem];??
[button?addTarget:self?action:@selector(postNoti)?forControlEvents:UIControlEventTouchUpInside];??
[self?addSubview:button];??
????}??
return?self;??
}??
//?點擊了button?發(fā)送通知??
-?(void)postNoti??
{??
NSString?*string?=?@"send?any?data";??
[[NSNotificationCenter?defaultCenter]?postNotificationName:@"sendData"??
?object:string];//?object?為ID?可以傳送任意類型數(shù)據(jù)?這里傳得時字符串??
}??
@end??
（數(shù)據(jù)持久化 寫入沙盒）?
