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日常開發(fā)中我們經(jīng)常遇到不同模塊之間需要進(jìn)行頁面的跳轉(zhuǎn)。我們常規(guī)的做法就是import 我們需要跳轉(zhuǎn)頁面的頭文件然后實(shí)例化進(jìn)行跳轉(zhuǎn)。如果同一個頁面需要使用多次我們就得重復(fù)多次這樣的操作。模塊之間這樣的多了之后就會造成頁面高度耦合管理混亂。

通過casa的iOS應(yīng)用架構(gòu)談組件化方案了解了CTMmediator 這個組件化工具

下面就用CTMmediator工具實(shí)現(xiàn)沒有添加依賴關(guān)系的情況下實(shí)現(xiàn)頁面的跳轉(zhuǎn)。

源碼 CTMmediator.h 有幾個方法實(shí)例化遠(yuǎn)程APP調(diào)用入口本地組件入口釋放緩存

#import <UIKit/UIKit.h>

extern NSString * const kCTMediatorParamsKeySwiftTargetModuleName;

@interface CTMediator : NSObject

+ (instancetype)sharedInstance;

// 遠(yuǎn)程App調(diào)用入口
- (id)performActionWithUrl:(NSURL *)url completion:(void(^)(NSDictionary *info))completion;
// 本地組件調(diào)用入口
- (id)performTarget:(NSString *)targetName action:(NSString *)actionName params:(NSDictionary *)params shouldCacheTarget:(BOOL)shouldCacheTarget;
- (void)releaseCachedTargetWithTargetName:(NSString *)targetName;

@end

CTMmediator.m


#import "CTMediator.h"
#import <objc/runtime.h>

NSString * const kCTMediatorParamsKeySwiftTargetModuleName = @"kCTMediatorParamsKeySwiftTargetModuleName";

@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]];
    }
    
    // 這里這么寫主要是出于安全考慮，防止黑客通過遠(yuǎn)程方式調(diào)用本地模塊。這里的做法足以應(yīng)對絕大多數(shù)場景，如果要求更加嚴(yán)苛，也可以做更加復(fù)雜的安全邏輯。
    NSString *actionName = [url.path stringByReplacingOccurrencesOfString:@"/" withString:@""];
    if ([actionName hasPrefix:@"native"]) {
        return @(NO);
    }
    
    // 這個demo針對URL的路由處理非常簡單，就只是取對應(yīng)的target名字和method名字，但這已經(jīng)足以應(yīng)對絕大部份需求。如果需要拓展，可以在這個方法調(diào)用之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 *swiftModuleName = params[kCTMediatorParamsKeySwiftTargetModuleName];
    
    // generate target
    NSString *targetClassString = nil;
    if (swiftModuleName.length > 0) {
        targetClassString = [NSString stringWithFormat:@"%@.Target_%@", swiftModuleName, targetName];
    } else {
        targetClassString = [NSString stringWithFormat:@"Target_%@", targetName];
    }
    NSObject *target = self.cachedTarget[targetClassString];
    if (target == nil) {
        Class targetClass = NSClassFromString(targetClassString);
        target = [[targetClass alloc] init];
    }
    
    // generate action
    NSString *actionString = [NSString stringWithFormat:@"Action_%@:", actionName];
    SEL action = NSSelectorFromString(actionString);
    
    if (target == nil) {
        // 這里是處理無響應(yīng)請求的地方之一，這個demo做得比較簡單，如果沒有可以響應(yīng)的target，就直接return了。實(shí)際開發(fā)過程中是可以事先給一個固定的target專門用于在這個時(shí)候頂上，然后處理這種請求的
        [self NoTargetActionResponseWithTargetString:targetClassString selectorString:actionString originParams:params];
        return nil;
    }
    
    if (shouldCacheTarget) {
        self.cachedTarget[targetClassString] = target;
    }

    if ([target respondsToSelector:action]) {
        return [self safePerformAction:action target:target params:params];
    } else {
        // 這里是處理無響應(yīng)請求的地方，如果無響應(yīng)，則嘗試調(diào)用對應(yīng)target的notFound方法統(tǒng)一處理
        SEL action = NSSelectorFromString(@"notFound:");
        if ([target respondsToSelector:action]) {
            return [self safePerformAction:action target:target params:params];
        } else {
            // 這里也是處理無響應(yīng)請求的地方，在notFound都沒有的時(shí)候，這個demo是直接return了。實(shí)際開發(fā)過程中，可以用前面提到的固定的target頂上的。
            [self NoTargetActionResponseWithTargetString:targetClassString selectorString:actionString originParams:params];
            [self.cachedTarget removeObjectForKey:targetClassString];
            return nil;
        }
    }
}

- (void)releaseCachedTargetWithTargetName:(NSString *)targetName
{
    NSString *targetClassString = [NSString stringWithFormat:@"Target_%@", targetName];
    [self.cachedTarget removeObjectForKey:targetClassString];
}

#pragma mark - private methods
- (void)NoTargetActionResponseWithTargetString:(NSString *)targetString selectorString:(NSString *)selectorString originParams:(NSDictionary *)originParams
{
    SEL action = NSSelectorFromString(@"Action_response:");
    NSObject *target = [[NSClassFromString(@"Target_NoTargetAction") alloc] init];
    
    NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
    params[@"originParams"] = originParams;
    params[@"targetString"] = targetString;
    params[@"selectorString"] = selectorString;
    
    [self safePerformAction:action target:target params:params];
}

- (id)safePerformAction:(SEL)action target:(NSObject *)target params:(NSDictionary *)params
{
    NSMethodSignature* methodSig = [target methodSignatureForSelector:action];
    if(methodSig == nil) {
        return nil;
    }
    const char* retType = [methodSig methodReturnType];

    if (strcmp(retType, @encode(void)) == 0) {
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSig];
        [invocation setArgument:&params atIndex:2];
        [invocation setSelector:action];
        [invocation setTarget:target];
        [invocation invoke];
        return nil;
    }

    if (strcmp(retType, @encode(NSInteger)) == 0) {
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSig];
        [invocation setArgument:&params atIndex:2];
        [invocation setSelector:action];
        [invocation setTarget:target];
        [invocation invoke];
        NSInteger result = 0;
        [invocation getReturnValue:&result];
        return @(result);
    }

    if (strcmp(retType, @encode(BOOL)) == 0) {
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSig];
        [invocation setArgument:&params atIndex:2];
        [invocation setSelector:action];
        [invocation setTarget:target];
        [invocation invoke];
        BOOL result = 0;
        [invocation getReturnValue:&result];
        return @(result);
    }

    if (strcmp(retType, @encode(CGFloat)) == 0) {
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSig];
        [invocation setArgument:&params atIndex:2];
        [invocation setSelector:action];
        [invocation setTarget:target];
        [invocation invoke];
        CGFloat result = 0;
        [invocation getReturnValue:&result];
        return @(result);
    }

    if (strcmp(retType, @encode(NSUInteger)) == 0) {
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSig];
        [invocation setArgument:&params atIndex:2];
        [invocation setSelector:action];
        [invocation setTarget:target];
        [invocation invoke];
        NSUInteger result = 0;
        [invocation getReturnValue:&result];
        return @(result);
    }

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    return [target performSelector:action withObject:params];
#pragma clang diagnostic pop
}

#pragma mark - getters and setters
- (NSMutableDictionary *)cachedTarget
{
    if (_cachedTarget == nil) {
        _cachedTarget = [[NSMutableDictionary alloc] init];
    }
    return _cachedTarget;
}

根據(jù)本地化組件接口進(jìn)行跳轉(zhuǎn)也非常的簡單創(chuàng)建一個Target_page 類拋出我們的控制器

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface Target_page : NSObject
//項(xiàng)目組件接口
-(UIViewController *)Action_TagetViewController:(NSDictionary *)params;

@end
#import "Target_page.h"
#import <UIKit/UIKit.h>
#import "TagetViewController.h"
@implementation Target_page
-(UIViewController *)Action_TagetViewController:(NSDictionary *)params
{
    
    TagetViewController * view = [[TagetViewController alloc]init];
    //根據(jù)需求是否進(jìn)行數(shù)據(jù)傳遞
    
    return  view;
    
}
@end

創(chuàng)建一個CTMmediator分類 CTMediator+NewsActions 這里面就是通過我們的中間層CTMmediator 去獲取我們的控制器

#import "CTMediator.h"
#import <UIKit/UIKit.h>

@interface CTMediator (NewsActions)

-(UIViewController *)show_TagetViewControllerDetails:(NSDictionary *)dict;


@end


#import "CTMediator+NewsActions.h"


NSString * const kCTMediatorTargetnews = @"page";

NSString * const kCTMediatorActionTagetViewController = @"TagetViewController";

@implementation CTMediator (NewsActions)

-(UIViewController *)Action_TagetViewController:(NSDictionary *)dict
{
    UIViewController  * viewController =  [self performTarget:kCTMediatorTargetnews action:kCTMediatorActionTagetViewController params:@{@"key":@"value"} shouldCacheTarget:NO];
    
    if ([viewController isKindOfClass:[UIViewController class]])
    {
        return viewController;
    }
    else
    {
        
         //carsh 處理
        return  nil;
    }
   
}
@end

獲取對象實(shí)現(xiàn)跳轉(zhuǎn) 這樣頁面間沒有import 沒有管理實(shí)現(xiàn)了跳轉(zhuǎn)達(dá)到了頁面解藕的目的

     UIViewController   * controller =  [[CTMediator sharedInstance] show_TagetViewControllerDetails:nil];
      [self.navigationController pushViewController:controller animated:YES];

在上面實(shí)現(xiàn)的過程中主要調(diào)用了 - (id)performTarget:(NSString *)targetName action:(NSString *)actionName params:(NSDictionary *)params shouldCacheTarget:(BOOL)shouldCacheTarget

注意需要傳遞幾個參數(shù)

taegetName 拋出對象類的名稱只需要傳遞Target_后面的部分
actionName 控制器名稱
params 跳轉(zhuǎn)需要的參數(shù)
shouldCacheTarget 是否緩存方便經(jīng)常使用

點(diǎn)進(jìn)實(shí)現(xiàn)查看主要是通過runtime 消息轉(zhuǎn)發(fā) 動態(tài)解析去實(shí)現(xiàn)

首先通過runtime NSClassFromString（）去找到我們拋出的類 Target_xxxx;


   NSString *swiftModuleName = params[kCTMediatorParamsKeySwiftTargetModuleName];
    
    // generate target
    NSString *targetClassString = nil;
    if (swiftModuleName.length > 0) {
        targetClassString = [NSString stringWithFormat:@"%@.Target_%@", swiftModuleName, targetName];
    } else {
        targetClassString = [NSString stringWithFormat:@"Target_%@", targetName];
    }
    NSObject *target = self.cachedTarget[targetClassString];
    if (target == nil) {
        Class targetClass = NSClassFromString(targetClassString);
        target = [[targetClass alloc] init];
    }

通過 runtime NSSelectorFromString（）去找到我們類里面的實(shí)現(xiàn)方法

   NSString *actionString = [NSString stringWithFormat:@"Action_%@:", actionName];
    SEL action = NSSelectorFromString(actionString);

然后通過消息轉(zhuǎn)發(fā)去響應(yīng) 并返回我們創(chuàng)建的實(shí)例

- (id)safePerformAction:(SEL)action target:(NSObject *)target params:(NSDictionary *)params
{
    NSMethodSignature* methodSig = [target methodSignatureForSelector:action];
    if(methodSig == nil) {
        return nil;
    }
    const char* retType = [methodSig methodReturnType];

    if (strcmp(retType, @encode(void)) == 0) {
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSig];
        [invocation setArgument:&params atIndex:2];
        [invocation setSelector:action];
        [invocation setTarget:target];
        [invocation invoke];
        return nil;
    }

    if (strcmp(retType, @encode(NSInteger)) == 0) {
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSig];
        [invocation setArgument:&params atIndex:2];
        [invocation setSelector:action];
        [invocation setTarget:target];
        [invocation invoke];
        NSInteger result = 0;
        [invocation getReturnValue:&result];
        return @(result);
    }

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IOS頁面組件化、解耦（CTMediator）

IOS頁面組件化、解耦（CTMediator）

友情鏈接更多精彩內(nèi)容

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IOS頁面組件化、解耦（CTMediator）

友情鏈接更多精彩內(nèi)容

色偷偷精品伊人,欧洲久久精品,欧美综合婷婷骚逼,国产AV主播,国产最新探花在线,九色在线视频一区,伊人大交九欧美,1769亚洲,黄色成人av

IOS頁面組件化、解耦（CTMediator）