ios 如何将“SEL”和“id”转换为 NSString？
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时间：2020-08-30 18:21:21 来源:igfitidea点击:
How to convert "SEL" and "id" to NSString?
提问by Manni
id parent;
SEL selector;
// lot's of code...
if ([parent respondsToSelector:selector]) {
}
else {
// This doesn't work:
NSString *errorMessage = [NSString stringWithFormat:@"%@ in class %@ doesn't exist!", selector, parent];
}
How do I convert "SEL" and "id" to a String?
如何将“SEL”和“id”转换为字符串？
回答by BoltClock
Call NSStringFromSelector()passing your selector as its argument to get the selector string, and use [parent class]for the parentobject's class:
调用NSStringFromSelector()将选择器作为参数传递以获取选择器字符串，并[parent class]用于parent对象的类：
NSString *errorMessage = [NSString stringWithFormat:@"%@ in class %@ doesn't exist!",
NSStringFromSelector(selector),
[parent class]];
