iOS 几种传值方式（属性，代理，block，通知，本地存储，单例类）附Demo

本来这次的代码写的比较简单，除了传值方式的选项外，没添加别的控件，只是把传过去的值在控制台打印了一下，但由于把多种传值方式放在了同一篇里面，所以文章会显得过长，文章内容都是直接粘的代码，主要是为了方便查看逻辑，有不清楚的地方，朋友们可以直接下载Demo看具体的结构和代码。

事例Demo：链接: http://pan.baidu.com/s/1pJmlr9D 密码: 7faq

属性传值

SetProrerty.h

#import <Foundation/Foundation.h>@interface SetProrerty : NSObject@property (nonatomic,copy)    NSString     *string;@property (nonatomic,strong)  NSArray      *array;@property (nonatomic,strong)  NSDictionary *dictionary;- (void)setProrerty;@end

SetProrerty.m

#import "SetProrerty.h"@implementation SetProrerty@synthesize string     = _string;@synthesize array      = _array;@synthesize dictionary = _dictionary;- (void)setProrerty{    self.string = @"string";    self.array  = @[@"object_0",@"object_1"];    self.dictionary = @{@"key_0":@"value_0",@"key_1":@"value_1"};}@end

GetProrerty.h

#import <Foundation/Foundation.h>@interface GetProrerty : NSObject- (void)getProperty;@end

GetProrerty.m

#import "GetProrerty.h"#import "SetProrerty.h"@implementation GetProrerty- (void)getProperty{    SetProrerty *setPro = [[SetProrerty alloc]init];    [setPro setProrerty];        NSLog(@"\n========>prorerty:\n%@;\n%@;\n%@;",setPro.string,setPro.array,setPro.dictionary);}@end

代理传值

SetDelegate.h

#import <Foundation/Foundation.h>@protocol TheDelegate;@interface SetDelegate : NSObject@property (nonatomic,weak)id <TheDelegate>delegate;- (void)callBackDelegate;@end//创建协议@protocol TheDelegate <NSObject>@required@optional- (void)setDelegateWithString:(NSString *)string;- (void)setDelegateWithArray:(NSArray *)array;- (void)setDelegateWithDictionary:(NSDictionary *)dictionary;- (void)setDelegateWithString:(NSString *)string andArray:(NSArray *)array andDictionary:(NSDictionary *)dictionary;@end

SetDelegate.m

#import "SetDelegate.h"@implementation SetDelegate@synthesize delegate = _delegate;- (void)callBackDelegate{    //监听代理方法是否被实现，若实现则执行该代理方法    if ([self.delegate respondsToSelector:@selector(setDelegateWithString:)]) {        [self.delegate setDelegateWithString:@"string"];    }    if ([self.delegate respondsToSelector:@selector(setDelegateWithArray:)]) {        [self.delegate setDelegateWithArray:@[@"object_0",@"object_1"] ];    }    if ([self.delegate respondsToSelector:@selector(setDelegateWithDictionary:)]) {        [self.delegate setDelegateWithDictionary:@{@"key_0":@"value_0",@"key_1":@"value_1"}];    }    if ([self.delegate respondsToSelector:@selector(setDelegateWithString:andArray:andDictionary:)]) {        [self.delegate setDelegateWithString:@"string" andArray:@[@"object_0",@"object_1"] andDictionary:@{@"key_0":@"value_0",@"key_1":@"value_1"}];    }}@end

GetDelegate.h

#import <Foundation/Foundation.h>#import "SetDelegate.h"@interface GetDelegate : NSObject<TheDelegate>- (void)getDelegate;@end

GetDelegate.m

#import "GetDelegate.h"@implementation GetDelegate- (void)getDelegate{    SetDelegate *setDelegate = [[SetDelegate alloc]init];    setDelegate.delegate = self;    [setDelegate callBackDelegate];}//代理方法（string）- (void)setDelegateWithString:(NSString *)string{    NSLog(@"\n========>delegate:\n%@", string);}//代理方法（array）- (void)setDelegateWithArray:(NSArray *)array{    NSLog(@"\n========>delegate:\n%@", array);}//代理方法（dictionary）- (void)setDelegateWithDictionary:(NSDictionary *)dictionary{    NSLog(@"\n========>delegate:\n%@", dictionary);}//代理方法（string, array, dictionary）- (void)setDelegateWithString:(NSString *)string andArray:(NSArray *)array andDictionary:(NSDictionary *)dictionary{    NSLog(@"\n========>delegate:\n%@\n%@\n%@", string, array, dictionary);}@end

Block传值

SetBlock.h

#import <Foundation/Foundation.h>@interface SetBlock : NSObject- (void)setBlockWithString:(void(^)(NSString *string))string;- (void)setBlockWithArray:(void(^)(NSArray *array))array;- (void)setBlockWithDictionary:(void(^)(NSDictionary *dictionary))dictionary;- (void)setBlockWithAll:(void(^)(NSString *string,NSArray *array,NSDictionary *dictionary))all;@end

SetBlock.m

#import "SetBlock.h"@implementation SetBlock- (void)setBlockWithString:(void(^)(NSString *string))string{    NSString *str = @"string";    if (string)    {        string(str);    }}- (void)setBlockWithArray:(void(^)(NSArray *array))array{    NSArray *arr = @[@"object_0",@"object_1"];    if (array)    {        array(arr);    }}- (void)setBlockWithDictionary:(void(^)(NSDictionary *dictionary))dictionary{    NSDictionary *dic = @{@"key_0":@"value_0",@"key_1":@"value_1"};    if (dictionary)    {        dictionary(dic);    }}- (void)setBlockWithAll:(void(^)(NSString *string,NSArray *array,NSDictionary *dictionary))all{    NSString *str = @"string";    NSArray *arr = @[@"object_0",@"object_1"];    NSDictionary *dic = @{@"key_0":@"value_0",@"key_1":@"value_1"};        if (all)    {        all(str,arr,dic);    }}@end

GetBlock.h

#import <Foundation/Foundation.h>typedef void (^BlockWithString)(NSString *string);typedef void (^BlockWithArray)(NSArray *array);typedef void (^BlockWithDictionary)(NSDictionary *dictionary);typedef void (^BlockWithAll)(NSString *string,NSArray *array,NSDictionary *dictionary);@interface GetBlock : NSObject@property (nonatomic,strong) BlockWithString stringBlock;@property (nonatomic,strong) BlockWithArray arrayBlock;@property (nonatomic,strong) BlockWithDictionary dictionaryBlock;@property (nonatomic,strong) BlockWithAll allBlock;- (void)getBlock;@end

GetBlock.m

#import "GetBlock.h"#import "SetBlock.h"@implementation GetBlock@synthesize stringBlock     = _stringBlock;@synthesize arrayBlock      = _arrayBlock;@synthesize dictionaryBlock = _dictionaryBlock;@synthesize allBlock        = _allBlock;- (void)getBlock{    SetBlock *block = [[SetBlock alloc]init];        [block setBlockWithString:^(NSString *string)    {        NSLog(@"============>block\n:%@",string);    }];        [block setBlockWithArray:^(NSArray *array) {        NSLog(@"============>block\n:%@", array);    }];        [block setBlockWithDictionary:^(NSDictionary *dictionary) {        NSLog(@"============>block\n:%@", dictionary);    }];        [block setBlockWithAll:^(NSString *string, NSArray *array, NSDictionary *dictionary) {        NSLog(@"============>block\n:%@\n%@\n%@", string, array, dictionary);    }];}@end

通知传值

SetNotification.h

#import <Foundation/Foundation.h>@interface SetNotification : NSObject- (void)setNotification;@end

SetNotification.m

#import "SetNotification.h"@implementation SetNotification- (void)setNotification{    //创建通知中心    NSNotificationCenter *center = [NSNotificationCenter defaultCenter];        //发送通知 以下是三种发送方式  //name：通知的名称  object:发通知的内容(只读)  userInfo:补充信息（字典）//    [center postNotification:<#(NSNotification *)#>]//    [center postNotificationName:<#(NSString *)#> object:<#(id)#>]//    [center postNotificationName:<#(NSString *)#> object:<#(id)#> userInfo:<#(NSDictionary *)#>]        NSString *string = @"string";    [center postNotificationName:@"string" object:string];    NSArray *array = @[@"object_1",@"object_1"];    [center postNotificationName:@"array" object:array];        NSDictionary *dictionary = @{@"kye_0":@"value_0",@"key_1":@"value_1"};    [center postNotificationName:@"dictionary" object:dictionary userInfo:nil];        //创建一个通知    NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:string,@"string",array,@"array",dictionary,@"dictionary", nil];    NSNotification *notification = [[NSNotification alloc]initWithName:@"all" object:string userInfo:dic];    [center postNotification:notification];    }@end

GetNotification.h

#import <Foundation/Foundation.h>@interface GetNotification : NSObject- (void)getNotification;@end

GetNotification.m

#import "GetNotification.h"#import "SetNotification.h"@implementation GetNotification- (void)dealloc{    //注销通知 注册与注销要成对出现    [[NSNotificationCenter defaultCenter]removeObserver:self];}- (void)getNotification{            //接收方创建通知中心    NSNotificationCenter * center = [NSNotificationCenter defaultCenter];    //注册 Observer：注册者  name：要接收的通知的名称 ；    //selector:接收到通知之后对应的操作方法；方法中传递的参数是接收到的通知    //object：对发送者的要求；一般填nil,不关心是谁发的通知； 如果写 腾讯 ，意思是只能接收到腾讯发的通知；    [center addObserver:self selector:@selector(receiveString:) name:@"string" object:nil];    [center addObserver:self selector:@selector(receiveArray:) name:@"array" object:nil];    [center addObserver:self selector:@selector(receiveDictionary:) name:@"dictionary" object:nil];    [center addObserver:self selector:@selector(receiveAll:) name:@"all" object:nil];}- (void)receiveString:(NSNotification*)notify{    id object = [notify object];    NSLog(@"============>getNotification:\n%@ ",object);}- (void)receiveArray:(NSNotification*)notify{    id object = [notify object];    NSLog(@"============>getNotification:\n%@ ",object);}- (void)receiveDictionary:(NSNotification*)notify{    id object = [notify object];    NSLog(@"============>getNotification:\n%@ ",object);}- (void)receiveAll:(NSNotification*)notify{    //接收通知里传过来的信息    NSDictionary *dic = [notify userInfo];    NSLog(@"============>getNotification:\n%@",dic);        }@end

本地存储传值

SetUserDefaults.h

#import <Foundation/Foundation.h>@interface SetUserDefaults : NSObject- (void)setUserDefaults;@end

SetUserDefaults.m

#import "SetUserDefaults.h"@implementation SetUserDefaults- (void)setUserDefaults{    [[NSUserDefaults standardUserDefaults] setObject:@"string" forKey:@"string"];    [[NSUserDefaults standardUserDefaults] setObject:@[@"object_0",@"object_1"] forKey:@"array"];    [[NSUserDefaults standardUserDefaults] setObject:@{@"key_0":@"value_0",@"key_1":@"value_1"} forKey:@"dictionary"];        //同步数据    [[NSUserDefaults standardUserDefaults] synchronize];}@end

GetUserDefaults.h

#import <Foundation/Foundation.h>@interface GetUserDefaults : NSObject- (void)getUserDefaults;@end

GetUserDefaults.m

#import "GetUserDefaults.h"@implementation GetUserDefaults- (void)getUserDefaults{    NSLog(@"=============>NSUserDefaults:%@\n", [[NSUserDefaults standardUserDefaults] objectForKey:@"string"]);    NSLog(@"=============>NSUserDefaults:%@\n", [[NSUserDefaults standardUserDefaults] objectForKey:@"array"]);    NSLog(@"=============>NSUserDefaults:%@\n", [[NSUserDefaults standardUserDefaults] objectForKey:@"dictionary"]);    //    //移除用户数据//    [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"string"];//    [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"array"];//    [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"dictionary"];    }

单例传值

SetSingleton.h

#import <Foundation/Foundation.h>@interface SetSingleton : NSObject- (void)setSingleton;@end

SetSingleton.m

#import "SetSingleton.h"#import "Singleton.h"@implementation SetSingleton- (void)setSingleton{//    [[Singleton shareData]setString:@"string"];//     跟上面的写法是等价的    Singleton *single = [Singleton shareData];    single.string     = @"string";    single.array      = @[@"object_0",@"object_1"];    single.dictionary = @{@"key_0":@"value_0",@"key_1":@"value_1"};}@end

GetSingleton.h

#import <Foundation/Foundation.h>@interface GetSingleton : NSObject- (void)getSingleton;@end

GetSingleton.m

#import "GetSingleton.h"#import "Singleton.h"@implementation GetSingleton- (void)getSingleton{    Singleton *single = [Singleton shareData];    NSLog(@"\n========>singleton:\n%@;\n%@;\n%@;",single.string,single.array,single.dictionary);}@end

Singleton.h

#import <Foundation/Foundation.h>@interface Singleton : NSObject@property (nonatomic,copy)    NSString     *string;@property (nonatomic,strong)  NSArray      *array;@property (nonatomic,strong)  NSDictionary *dictionary;+ (Singleton *)shareData;@end

Singleton.m

#import "Singleton.h"@implementation Singleton@synthesize string     = _string;@synthesize array      = _array;@synthesize dictionary = _dictionary;static Singleton *singletonData = nil;+ (Singleton *)shareData{    if (!singletonData)    {        singletonData = [[Singleton alloc]init];    }        return singletonData;}@end