Objective c 如何检查传入的JSON提要是否包含单个记录或多个记录?
我必须在iOS上解析这个JSONObjective c 如何检查传入的JSON提要是否包含单个记录或多个记录?,objective-c,ios,json,nsarray,nsdictionary,Objective C,Ios,Json,Nsarray,Nsdictionary,我必须在iOS上解析这个JSON { "log_by_dates": { "logs": [ { "date": "Wednesday 5 December 2012", "exercises": "0", "workouts": "0", "log_entries": "0" }, { "date": "Tuesday
{
"log_by_dates": {
"logs": [
{
"date": "Wednesday 5 December 2012",
"exercises": "0",
"workouts": "0",
"log_entries": "0"
},
{
"date": "Tuesday 4 December 2012",
"exercises": "4",
"workouts": "2",
"log_entries": "7"
}
]
}
}
我已经编写了以下代码来解析它
NSArray *logs = [[(NSDictionary*)results objectForKey:@"log_by_dates"] objectForKey:@"logs"];
for (NSDictionary *aLog in logs) {
Log *newLog = [[Log alloc] initWithDate:[aLog objectForKey:@"date"] withExercises:[aLog objectForKey:@"exercises"]
withWorkouts:[aLog objectForKey:@"workouts"]];
if (!data) {
data = [[NSMutableArray alloc] init];
}
但问题是,有时我会得到这样的JSON值
{
"log_by_dates": {
"logs":
{
"date": "Wednesday 5 December 2012",
"exercises": "0",
"workouts": "0",
"log_entries": "0"
}
}
}
这使得我的代码崩溃
请指导我,在解析之前,我使用if()else条件检查传入的JSON对象是否包含单个JSON对象的多个记录,以便编写适当的代码来处理字典或数组。
谢谢,请像这样更新您的代码
NSArray *logs = [[(NSDictionary*)results objectForKey:@"log_by_dates"] objectForKey:@"logs"];
if([logs isKindOfClass:[NSArray class]]) {
for (NSDictionary *aLog in logs) {
Log *newLog = [[Log alloc] initWithDate:[aLog objectForKey:@"date"] withExercises:[aLog objectForKey:@"exercises"]
withWorkouts:[aLog objectForKey:@"workouts"]];
if (!data) {
data = [[NSMutableArray alloc] init];
}
}
}
else if([logs isKindOfClass:[NSDictionary class]]) {
NSDictionary *aLog = (NSDictionary *)logs;
Log *newLog = [[Log alloc] initWithDate:[aLog objectForKey:@"date"] withExercises:[aLog objectForKey:@"exercises"]
withWorkouts:[aLog objectForKey:@"workouts"]];
if (!data) {
data = [[NSMutableArray alloc] init];
}
}
像这样检查条件
if([[[(NSDictionary*)results objectForKey:@"log_by_dates"] objectForKey:@"logs"] isKindOfClass:[NSArray class]])
{
// Do your Array Stuff Here
} else {
// Do your Dictionary Stuff Here
}
在
for
循环之前插入此项:
if(![logs iskindof类:[NSArray类]]
{
logs=[NSArray arrayWithObject:logs];
}
它是如何崩溃的,错误消息是什么?