Well, I know the cause of the error, my question here is how to avoid this kind of error. In my case, what I want is, if the user enters a wrong id which means when the array return 0 results, is says for example :
我知道错误的原因，我的问题是如何避免这种错误。在我的例子中，我想要的是，如果用户输入了一个错误的id，这意味着当数组返回0结果时，例如:
NSLog (@"The id you entered is false !");
else, it proceeds the code normally without crashing.
否则，代码通常不会崩溃。
Any ideas on how I can solve it ?
有什么办法可以解决吗?
1 个解决方案
#1
1
id array = [dataDictionary objectForKey:@"routes"];
if([array count] == 0) {
NSLog(@"don't access it as the index is out of bounds);
return;
}
#1
1
id array = [dataDictionary objectForKey:@"routes"];
if([array count] == 0) {
NSLog(@"don't access it as the index is out of bounds);
return;
}