尝试从来自 Web 服务 ios 的响应中显示多个标签
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【中文标题】尝试从来自 Web 服务 ios 的响应中显示多个标签【英文标题】：Trying to show to multiple label from response which came from web service ios 【发布时间】：2015-09-19 09:43:13 【问题描述】：我正在尝试在 tableview 中显示来自 web 服务响应的驱动程序详细信息（用于复杂设计的自定义 tableview 单元格）但是应用程序崩溃了，我尝试了许多其他替代方法但不起作用请帮助这里是代码：
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
id jsonResponseData = [NSJSONSerialization JSONObjectWithData:self.responseData options:kNilOptions error:nil];
NSArray * jsonResponseDataArray = [jsonResponseData objectForKey:@"data"];
[[NSOperationQueue mainQueue] addOperationWithBlock:^
[self createMarkerObjectsWithJson:jsonResponseDataArray];
];
[[self driverListTableView] reloadData];
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
return 1;
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
return [arrayMain count];
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
static NSString *cellIdentifier = @"Cell";
//NSLog(@"arrayMain : %@",arrayMain);
//method to return custom cell
DriverListTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (!cell)
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"DriverListTableViewCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
//NSLog(@"nsarray: %lu",(unsigned long)[arrayMain count]);
NSDictionary *testDict = [arrayMain objectAtIndex:indexPath.row];
NSLog(@"mainDict : %@",testDict);
NSString *firstName = [testDict objectForKey:@"f_name"];
NSString *lastName = [testDict objectForKey:@"l_name"];
NSString *companyName = [NSString stringWithFormat:@"%@ %@",firstName,lastName];
NSString *basePrice = [testDict objectForKey:@"base_price"];
NSString *carType = [testDict objectForKey:@"car_type_label"];
NSString *waitingTime = [testDict objectForKey:@"waiting_time"];
NSLog(@"d_id %@",companyName);
cell.labelCompanyName.text = companyName;
//cell.imageView.image = [UIImage imageNamed:@"driver-1.png"];
cell.labelBasePrice.text = basePrice;
cell.labelCarType.text = carType;
cell.labelWaitingTime.text = waitingTime;
cell.backgroundColor = [UIColor clearColor];
return cell;
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
NSLog(@"selected at index: %ld",(long)indexPath.row);
@end
当我尝试在 cellForRowAtindexpath 方法中显示多个标签时，应用程序会崩溃。如果您无法理解问题，请在 cmets 中告诉我，我会提供更多信息。
jsonResponseData 是：
count = 131;
data = (
"base_fare" = 20;
"c_no" = "";
"c_type" = 1;
"car_type_label" = "";
color = "";
"d_id" = bZ;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Saikat;
"l_name" = Singh;
status = 1;
"waiting_time" = 8;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 2;
"car_type_label" = "";
color = "";
"d_id" = KlCxEa;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Saikat;
"l_name" = Singh;
status = 1;
"waiting_time" = 20;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = bZHXHX;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Sourav;
"l_name" = Prasad;
status = 1;
"waiting_time" = 22;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = KlbZCx;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Sourav;
"l_name" = Prasad;
status = 1;
"waiting_time" = 21;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = KlbZKl;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Sourav;
"l_name" = Khan;
status = 1;
"waiting_time" = 15;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = KlbZpS;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Amar;
"l_name" = Prasad;
status = 1;
"waiting_time" = 22;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = KlpSQv;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Saikat;
"l_name" = Khan;
status = 1;
"waiting_time" = 15;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = KlpSHX;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Sudipta;
"l_name" = Singh;
status = 1;
"waiting_time" = 7;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = KlEabZ;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Saikat;
"l_name" = Khan;
status = 1;
"waiting_time" = 6;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = KlQvEa;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Vasu;
"l_name" = Prasad;
status = 1;
"waiting_time" = 14;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = KlHXmN;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Saikat;
"l_name" = Brando;
status = 1;
"waiting_time" = 8;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = mNbZCx;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Saikat;
"l_name" = Brando;
status = 1;
"waiting_time" = 6;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = mNbZEa;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Vasu;
"l_name" = Singh;
status = 1;
"waiting_time" = 16;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = mNmNEa;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Vasu;
"l_name" = Prasad;
status = 1;
"waiting_time" = 23;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = mNmNbG;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Sudipta;
"l_name" = Singh;
status = 1;
"waiting_time" = 20;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = mNOrKl;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Amar;
"l_name" = Brando;
status = 1;
"waiting_time" = 9;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = mNOrbG;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Vasu;
"l_name" = Khan;
status = 1;
"waiting_time" = 22;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = mNEamN;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Sudipta;
"l_name" = Roy;
status = 1;
"waiting_time" = 28;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = mNEapS;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Vasu;
"l_name" = Singh;
status = 1;
"waiting_time" = 24;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrCxKl;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Vasu;
"l_name" = Khan;
status = 1;
"waiting_time" = 30;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrCxmN;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Vasu;
"l_name" = Roy;
status = 1;
"waiting_time" = 7;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrmNbZ;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Amar;
"l_name" = Roy;
status = 1;
"waiting_time" = 24;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrmNQv;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Vasu;
"l_name" = Khan;
status = 1;
"waiting_time" = 19;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrOrCx;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Amar;
"l_name" = Khan;
status = 1;
"waiting_time" = 19;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrOrmN;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Saikat;
"l_name" = Khan;
status = 1;
"waiting_time" = 22;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrEabZ;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Sourav;
"l_name" = Khan;
status = 1;
"waiting_time" = 12;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrHXbZ;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Amar;
"l_name" = Brando;
status = 1;
"waiting_time" = 25;
,
"base_fare" = 20;
"c_no" = "";
"c_type" = 3;
"car_type_label" = "";
color = "";
"d_id" = OrHXHX;
"d_type" = 1;
"driver_type_label" = "";
"f_name" = Amar;
"l_name" = Prasad;
status = 1;
"waiting_time" = 29;
);
错误
-[NSCFNumber 长度]：无法识别的选择器发送到实例 0xb000000000000083 2015-09-19 16:09:42.153 sRider[4995:102757] *** 由于未捕获的异常而终止应用程序 'NSInvalidArgumentException'，原因：'-[__NSCFNumber 长度]： 无法识别的选择器发送到实例 0xb000000000000083' *** 第一次抛出调用堆栈：( 0 CoreFoundation 0x00000001113a4c65 __exceptionPreprocess + 165 1 libobjc.A.dylib 0x000000011103dbb7 objc_exception_throw + 45 2 核心基础 0x00000001113ac0ad -[NSObject(NSObject) 不识别选择器:] + 205 3 核心基础 0x000000011130213c ___forwarding_ + 988 4 CoreFoundation 0x0000000111301cd8 _CF_forwarding_prep_0 + 120 5 UIKit 0x0000000111970a74 -[UILabel _textRectForBounds:limitedToNumberOfLines:包括Shadow:] + 65 6 UIKit 0x00000001119708cf -[UILabel textRectForBounds:limitedToNumberOfLines:] + 76 7 UIKit 0x0000000111974379 -[UILabel _intrinsicSizeWithinSize:] + 170 8 UIKit 0x0000000111974459-[UILabel 内在内容大小] + 76 9 UIKit 0x0000000111e12a0c -[UIView(UIConstraintBasedLayout) _generateContentSizeConstraints] + 33 10 UIKit 0x0000000111e127d0 -[UIView(UIConstraintBasedLayout) _updateContentSizeConstraints] + 422 11 UIKit 0x0000000111e19bc5 -[UIView(AdditionalLayoutSupport) updateConstraints] + 162 12 UIKit 0x00000001119742c4 -[UILabel 更新约束] + 274
【问题讨论】：
这是很多代码，没有关于崩溃类型、消息或堆栈跟踪的详细信息。仅显示适当的代码和所有崩溃详细信息 同意@Wain。我会测试填充您正在调用的数组的对象，以在带有标签的简单视图中加载 tableView，以确保您没有调用不存在的对象。然后我会检查手机注册以确保你做得对。还要测试数组以确保您没有尝试将 tableView 填充到 array.count 之后。 我已经编辑了代码以使其简短，@noobsmcgoobs 我无法真正理解你的意思我是 Objective c 的新手，所以请不要让我扯掉我的头发。 【参考方案1】：我修复了错误，好像我必须将我从数组中获取的值更改为字符串，因为它来自 NSNumber ，所以我通过将标签文本设置为 NSString 将其更改为 NSString - 格式如下的字符串：
cell.labelBasePrice.text = [NSString stringWithFormat:@"%@",[testDict objectForKey:@"base_fare"]];
cell.labelCarType.text = [NSString stringWithFormat:@"%@",[testDict objectForKey:@"car_type_label"]];
cell.labelWaitingTime.text = [NSString stringWithFormat:@"Waiting %@",[testDict objectForKey:@"waiting_time"]];
【讨论】：
感谢@Wain 指出我忘记检查控制台中的错误，因为我是菜鸟，很难习惯这种东西。 :P【参考方案2】：0x00000001113ac0ad -[NSObject(NSObject) doesNotRecognizeSelector:]
这一行告诉我，您正在向一个对象发送消息，该对象的标头中没有某些方法。
-[NSCFNumber length]: unrecognized selector sent to instance 0xb000000000000083 2015-09-19 16:09:42.153 sRider[4995:102757] * 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因: '-[__NSCFNumber 长度]:**
这个特别告诉我你正在向一些不采用该方法的 NSNumber 对象发送length 方法。
[__NSCFNumber length]: unrecognized selector sent to instance 0x6d21350
您必须检查您的代码，看看您是否将 NSNumber 误认为 NSString。查看您的 JSON 并尝试确定您是否将任何表示自定义类中的 JSON 的属性作为 NSNumber 发送，它们应该是 NSString 或者如果您错误地将 length 消息发送到真正的 NSNumber你想要一些其他的方法。
【讨论】：
@noobsmgoobs 我已经回答了我的问题，谢谢你的回答以上是关于尝试从来自 Web 服务 ios 的响应中显示多个标签的主要内容，如果未能解决你的问题，请参考以下文章
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