ios – 如何在块中获取变量的值

概述无论如何都要使用completionHandler检查’type’变量的值. -(void)sendApiMethod:(NSString*)apiName ApiType:(NSString*)type{ [SendAPI setAPIWithName:@"APIName" completionHandler:^(NSArray *errors) { if([type isE 无论如何都要使用completionHandler检查’type’变量的值.

-(voID)sendAPIMethod:(Nsstring*)APIname APIType:(Nsstring*)type{ [SendAPI setAPIWithname:@"APIname" completionHandler:^(NSArray *errors) {        if([type isEqualToString:@"Login"])        {           /// Call Some Other function        }    }];}

解决方法 我写了一小段代码来验证是否有效(只读你的问题,我会说是Droppy)

我在Simple VIEw App的VIEwController中添加了所有代码.
一些假设：
– 所有代码都是为了简洁….
– 我已经添加了一个单例,因为它似乎正在调用一个类方法.
– 实例方法有点粗糙,它只是保存名称和块
– 我为块添加了一个typedef以便更好地阅读它.

#import "VIEwController.h"typedef voID (^CompletionBlock)(NSArray *errors);@interface SendAPI : NSObject-(voID)setAPIWithname:(Nsstring*)name completionHandler: (CompletionBlock)completionHandler;+(voID)setAPIWithname:(Nsstring*)name completionHandler: (CompletionBlock)completionHandler;+(SendAPI*)sharedInstance;@property (strong) CompletionBlock completionBlock;@property (strong) Nsstring * name;@end@implementation SendAPI : NSObjectstatic SendAPI * _singleton = nil;+(SendAPI*)sharedInstance{    if (_singleton == nil)    {        _singleton = [[SendAPI alloc] init];    }    return _singleton;}-(voID)setAPIWithname:(Nsstring*)name completionHandler: (CompletionBlock)completionHandler;{    self.completionBlock = completionHandler;    self.name = [name copy];    __weak SendAPI * weakRef = self;    dispatch_after(dispatch_time(disPATCH_TIME_Now,(int64_t)(4 * NSEC_PER_SEC)),dispatch_get_main_queue(),^{        NSError* err = [NSError errorWithDomain: @"delayed"                                           code:1111                                       userInfo: @{@"info": self.name}                        ];        weakRef.completionBlock(@[err]);    });}+(voID)setAPIWithname:(Nsstring*)name completionHandler: (CompletionBlock)completionHandler;{    [[SendAPI sharedInstance]setAPIWithname:name completionHandler:completionHandler];}@end@interface VIEwController ()@end@implementation VIEwController- (voID)vIEwDIDLoad {    [super vIEwDIDLoad];    [self sendAPIMethod:@"HELLO" APIType: @"Login"];}-(voID)sendAPIMethod:(Nsstring*)APIname APIType:(Nsstring*)type{    [SendAPI setAPIWithname:@"APIname" completionHandler:^(NSArray *errors) {     if([type isEqualToString:@"Login"])     {         /// Call Some Other function         NSLog(@"%@",errors);     } }];}

它正确记录

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