iOS reason: '-[__NSArrayM objectForKeyedSubscript:]: unrecognized selector sent to instance 0x60800

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一、源代码

NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];

NSLog(@"dic === %@",dic);

打印结果:dic === {
len = 69;
list = (
{

//是字段数据

}

for (NSDictionary * subDic in dic[@"list"]) {

NSLog(@“遍历数据”);

}

如果后台数据格式修改不是dic[@"list”]),就是崩溃报错如下:

reason: '-[__NSArrayM objectForKeyedSubscript:]: unrecognized selector sent to instance 0x60800025e840'

二、解决方案

解决方法一:

NSMutableArray *topLevelArray = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

NSDictionary *dict = topLevelArray[0];

for (NSDictionary * subDic in dict) {

NSLog(@“遍历数据”);

}

解决方法二:

如果您想要检查你的什么，你可以使用 isKindOfClass:像这样：

id jso = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

if (jso == nil) {

// Error. You should probably have passed an NSError ** as the error

// argument so you could log it.

} else if ([jso isKindOfClass:[NSArray class]]) {

NSArray *array = jso;

// process array elements

} else if ([jso isKindOfClass:[NSDictionary class]]) {

NSDictionary *dict = jso;

// process dictionary elements

} else {

// Shouldn't happen unless you use the NSJSONReadingAllowFragments flag.

}