目标c iOS传递数据

嗨，我是iOS新手，下面是我的代码，我必须通过请求-回复的顶部…请帮助我，我被困在这里 第一个视图控制器是otp视图，第二个vc是verifyviewcontroller

Otp视图c.h

#import <UIKit/UIKit.h>
@interface OtpViewController : UIViewController
@property (nonatomic, retain) NSString *str;
@end

---

在nslog上，我得到的回复是（“成功”：“1”；“otp”：“985123”），我需要在下一页中存储和验证此otp。请帮助首先您需要更改属性

来自

@property (weak,nonatomic) NSArray *tmp;

至

 @property (strong,nonatomic) NSStirng *tmp;

将值分配给tmp，如下所示

[[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
           NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; // this is json string
           NSError *error;
           NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error]; // you need to convert to dictionary object

            NSLog(@"requestReply: %@", jsonDict);
            self.tmp=[jsonDict valueForKey:@"otp"] ; // you need to extract value using the key   [requestReply valueForKey:@"otp"];
            NSLog(@"%@",self.tmp);

    }] resume];

将tmp传递给VerifyVIewController

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(nullable id)sender{

VerifyViewController *loadCtr = (VerifyViewController *)segue.destinationViewController;
loadCtr.delegate = self;
loadCtr.tmpStr = self.tmp;
NSLog(@"passing val: %@",_tmp);
}

---

你可以找到helpfull.2017-05-31 12:10:12.540菜单栏[1315:76259]数据详细信息是phone=9047038606 2017-05-31 12:10:12.554菜单栏[1315:76259]passing val:（null）2017-05-31 12:10:13.267菜单栏[1315:76307]请求回复：{“成功”：1，“otp”：“118301”}2017-05-31 12:10:13.268菜单栏[1315:76307]{“成功”：1，“otp”：“118301”}2017-05-31 12:10:13.269菜单栏[1315:76307]{“成功”：1，“otp”：“118301”}@EvgeniyKleban我已经检查过了，但是答案通过了布尔值。你能解释一下你想做什么吗？我需要这个顶部来存储可以纠正吗？top还是otp？谢谢你的努力！！我在log2017-05-31 12:43:32.741菜单栏[1398:90037]传递值：（null）2017-05-31 12:43:33.464菜单栏[1398:90096]请求回复：{“成功”：1，“otp”：“753161”}2017-05-31 12:43:33.464菜单栏[1398:90096]{“成功”：1，“otp”：“753161”}您需要提取值。self.tmp=[requestReply valueForKey:@“otp”]；2017-05-31 12:51:08.063菜单栏[1435:93502]***由于未捕获的异常“NSUnknownKeyException”而终止应用程序，原因：“[valueForUndefinedKey:]：此类不符合密钥otp的键值编码要求。”***第一次抛出调用堆栈：

 @property (strong,nonatomic) NSStirng *tmp;

[[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
           NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; // this is json string
           NSError *error;
           NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error]; // you need to convert to dictionary object

            NSLog(@"requestReply: %@", jsonDict);
            self.tmp=[jsonDict valueForKey:@"otp"] ; // you need to extract value using the key   [requestReply valueForKey:@"otp"];
            NSLog(@"%@",self.tmp);

    }] resume];

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(nullable id)sender{

VerifyViewController *loadCtr = (VerifyViewController *)segue.destinationViewController;
loadCtr.delegate = self;
loadCtr.tmpStr = self.tmp;
NSLog(@"passing val: %@",_tmp);
}