测试对象是否是类a的实例:

[yourObject isKindOfClass:[a class]]
// Returns a Boolean value that indicates whether the receiver is an instance of 
// given class or an instance of any class that inherits from that class.

or

[yourObject isMemberOfClass:[a class]]
// Returns a Boolean value that indicates whether the receiver is an instance of a 
// given class.

要获取对象的类名，可以使用NSStringFromClass函数:

NSString *className = NSStringFromClass([yourObject class]);

或者objective-c runtime api中的c函数:

#import <objc/runtime.h>

/* ... */

const char* className = class_getName([yourObject class]);
NSLog(@"yourObject is a: %s", className);

编辑:在Swift

if touch.view is UIPickerView {
    // touch.view is of type UIPickerView
}

您还可以检查运行时。在代码中放入一个断点并在(lldb)控制台中写入

(lldb) po [yourObject class]

像这样的. .

测试对象是否是类a的实例:

[yourObject isKindOfClass:[a class]]
// Returns a Boolean value that indicates whether the receiver is an instance of 
// given class or an instance of any class that inherits from that class.

or

[yourObject isMemberOfClass:[a class]]
// Returns a Boolean value that indicates whether the receiver is an instance of a 
// given class.

要获取对象的类名，可以使用NSStringFromClass函数:

NSString *className = NSStringFromClass([yourObject class]);

或者objective-c runtime api中的c函数:

#import <objc/runtime.h>

/* ... */

const char* className = class_getName([yourObject class]);
NSLog(@"yourObject is a: %s", className);

编辑:在Swift

if touch.view is UIPickerView {
    // touch.view is of type UIPickerView
}

如果你想检查一个特定的类，那么你可以使用

if([MyClass class] == [myClassObj class]) {
//your object is instance of MyClass
}

你也可以用

NSString *className = [[myObject class] description]; 

在任何NSObject上

如果你想获得类的名称，只需调用:-

id yourObject= [AnotherClass returningObject];

NSString *className=[yourObject className];

NSLog(@"Class name is : %@",className);