1、蘑菇街url-block方案
這是蘑菇街中應用的一種頁面間調用的方式，經過在啓動時註冊組件提供的服務，把調用組件使用的url和組件提供的服務block對應起來，保存到內存中。在使用組件的服務時，經過url找到對應的block，而後獲取服務。安全
具體實現代碼以下：atom
//Mediator.m 中間件
@implementation Mediator
typedef void (^componentBlock) (id param);
@property (nonatomic, storng) NSMutableDictionary *cache
- (void)registerURLPattern:(NSString *)urlPattern toHandler:(componentBlock)blk {
[cache setObject:blk forKey:urlPattern];
}
- (void)openURL:(NSString *)url withParam:(id)param {
componentBlock blk = [cache objectForKey:url];
if (blk) blk(param);
}
@end
1.先在Mediator中註冊url-block
#import "Mediator.h"
#import "WRBookDetailViewController.h"
+ (void)initComponent {
[[Mediator sharedInstance] registerURLPattern:@"weread://bookDetail" toHandler:^(NSDictionary *param) {
WRBookDetailViewController *detailVC = [[WRBookDetailViewController alloc] initWithBookId:param[@"bookId"]];
[[UIApplication sharedApplication].keyWindow.rootViewController.navigationController pushViewController:detailVC animated:YES];
}];
}
2.經過url在中間件中就能找到對應的block，並執行跳轉
#import "Mediator.h"
+ (void)gotoDetail:(NSString *)bookId {
[[Mediator sharedInstance] openURL:@"weread://bookDetail" withParam:@{@"bookId": bookId}];
}
2、 蘑菇街protocol-class方案
針對url-block方案沒法傳遞非正規參數，新增一種protocol-class方案url
//ProtocolMediator.m 中間件
@implementation ProtocolMediator
@property (nonatomic, storng) NSMutableDictionary *protocolCache
- (void)registerProtocol:(Protocol *)proto forClass:(Class)cls {
NSMutableDictionary *protocolCache;
[protocolCache setObject:cls forKey:NSStringFromProtocol(proto)];
}
- (Class)classForProtocol:(Protocol *)proto {
return protocolCache[NSStringFromProtocol(proto)];
}
@end
每個組件都有一個公共Protocol文件，定義了每個組件對外提供的接口spa
//ComponentProtocol.h
@protocol BookDetailComponentProtocol <NSObject>
- (UIViewController *)bookDetailController:(NSString *)bookId;
- (UIImage *)coverImageWithBookId:(NSString *)bookId;
@end
@protocol ReviewComponentProtocol <NSObject>
- (UIViewController *)ReviewController:(NSString *)bookId;
@end
//BookDetailComponent 組件
#import "ProtocolMediator.h"
#import "ComponentProtocol.h"
#import "WRBookDetailViewController.h"
+ (void)initComponent{
[[ProtocolMediator sharedInstance] registerProtocol:@protocol(BookDetailComponentProtocol) forClass:[self class];
}
- (UIViewController *)bookDetailController:(NSString *)bookId {
WRBookDetailViewController *detailVC = [[WRBookDetailViewController alloc] initWithBookId:param[@"bookId"]];
return detailVC;
}
- (UIImage *)coverImageWithBookId:(NSString *)bookId {
….
}
最後調用者經過 protocol 從 ProtocolMediator 拿到提供這些方法的 Class，再進行調用：code
//WRReadingViewController.m 調用者
//ReadingViewController.m
#import "ProtocolMediator.h"
#import "ComponentProtocol.h"
+ (void)gotoDetail:(NSString *)bookId {
Class cls = [[ProtocolMediator sharedInstance] classForProtocol:BookDetailComponentProtocol];
id bookDetailComponent = [[cls alloc] init];
UIViewController *vc = [bookDetailComponent bookDetailController:bookId];
[self.navigationController pushViewController:vc animated:YES];
}
3、target-action方案
1.先設置一箇中間件公共類
@interface CTMediator : NSObject
+ (instancetype)sharedInstance;
// 遠程App調用入口
- (id)performActionWithUrl:(NSURL *)url completion:(void(^)(NSDictionary *info))completion;
// 本地組件調用入口
- (id)performTarget:(NSString *)targetName action:(NSString *)actionName params:(NSDictionary *)params shouldCacheTarget:(BOOL)shouldCacheTarget;
- (void)releaseCachedTargetWithTargetName:(NSString *)targetName;
@end
//
// CTMediator.m
// CTMediator
//
// Created by casa on 16/3/13.
// Copyright © 2016年 casa. All rights reserved.
//
#import "CTMediator.h"
@interface CTMediator ()
@property (nonatomic, strong) NSMutableDictionary *cachedTarget;
@end
@implementation CTMediator
#pragma mark - public methods
+ (instancetype)sharedInstance
{
static CTMediator *mediator;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
mediator = [[CTMediator alloc] init];
});
return mediator;
}
/*
scheme://[target]/[action]?[params]
url sample:
aaa://targetA/actionB?id=1234
*/
- (id)performActionWithUrl:(NSURL *)url completion:(void (^)(NSDictionary *))completion
{
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
NSString *urlString = [url query];
for (NSString *param in [urlString componentsSeparatedByString:@"&"]) {
NSArray *elts = [param componentsSeparatedByString:@"="];
if([elts count] < 2) continue;
[params setObject:[elts lastObject] forKey:[elts firstObject]];
}
// 這裏這麼寫主要是出於安全考慮，防止黑客經過遠程方式調用本地模塊。這裏的作法足以應對絕大多數場景，若是要求更加嚴苛，也能夠作更加複雜的安全邏輯。
NSString *actionName = [url.path stringByReplacingOccurrencesOfString:@"/" withString:@""];
if ([actionName hasPrefix:@"native"]) {
return @(NO);
}
// 這個demo針對URL的路由處理很是簡單，就只是取對應的target名字和method名字，但這已經足以應對絕大部份需求。若是須要拓展，能夠在這個方法調用以前加入完整的路由邏輯
id result = [self performTarget:url.host action:actionName params:params shouldCacheTarget:NO];
if (completion) {
if (result) {
completion(@{@"result":result});
} else {
completion(nil);
}
}
return result;
}
- (id)performTarget:(NSString *)targetName action:(NSString *)actionName params:(NSDictionary *)params shouldCacheTarget:(BOOL)shouldCacheTarget
{
NSString *targetClassString = [NSString stringWithFormat:@"Target_%@", targetName];
NSString *actionString = [NSString stringWithFormat:@"Action_%@:", actionName];
id target = self.cachedTarget[targetClassString];
if (target == nil) {
Class targetClass = NSClassFromString(targetClassString);
target = [[targetClass alloc] init];
}
SEL action = NSSelectorFromString(actionString);
if (target == nil) {
// 這裏是處理無響應請求的地方之一，這個demo作得比較簡單，若是沒有能夠響應的target，就直接return了。實際開發過程當中是能夠事先給一個固定的target專門用於在這個時候頂上，而後處理這種請求的
return nil;
}
if (shouldCacheTarget) {
self.cachedTarget[targetClassString] = target;
}
if ([target respondsToSelector:action]) {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
return [target performSelector:action withObject:params];
#pragma clang diagnostic pop
} else {
// 這裏是處理無響應請求的地方，若是無響應，則嘗試調用對應target的notFound方法統一處理
SEL action = NSSelectorFromString(@"notFound:");
if ([target respondsToSelector:action]) {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
return [target performSelector:action withObject:params];
#pragma clang diagnostic pop
} else {
// 這裏也是處理無響應請求的地方，在notFound都沒有的時候，這個demo是直接return了。實際開發過程當中，能夠用前面提到的固定的target頂上的。
[self.cachedTarget removeObjectForKey:targetClassString];
return nil;
}
}
}
- (void)releaseCachedTargetWithTargetName:(NSString *)targetName
{
NSString *targetClassString = [NSString stringWithFormat:@"Target_%@", targetName];
[self.cachedTarget removeObjectForKey:targetClassString];
}
#pragma mark - getters and setters
- (NSMutableDictionary *)cachedTarget
{
if (_cachedTarget == nil) {
_cachedTarget = [[NSMutableDictionary alloc] init];
}
return _cachedTarget;
}
@end
2.每一個組件建立一個Category，在其中實現當前組件的跳轉實現component
#import <CTMediator/CTMediator.h>
#import <UIKit/UIKit.h>
@interface CTMediator (TAConfirmOrder)
- (UIViewController *)confirmOrderViewControllerWithGoodsId:(NSString *)goodsId goodsName:(NSString *)goodsName ConfirmComplete:(dispatch_block_t)confirmComplete;
@end
#import "CTMediator+TAConfirmOrder.h"
@implementation CTMediator (TAConfirmOrder)
- (UIViewController *)confirmOrderViewControllerWithGoodsId:(NSString *)goodsId goodsName:(NSString *)goodsName ConfirmComplete:(dispatch_block_t)confirmComplete
{
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
params[@"goodsId"] = goodsId;
params[@"goodsName"] = goodsName;
params[@"completeBlock"] = confirmComplete;
return [self performTarget:@"TAConfirmOrder" action:@"ConfirmOrderViewController" params:params shouldCacheTarget:NO];
}
@end
3.經過中間件調用
UIViewController *confirmOrderVC = [[CTMediator sharedInstance] confirmOrderViewControllerWithGoodsId:self.goodsId goodsName:self.goodsName ConfirmComplete:^{orm
//...中間件
}];blog