//查看苹果所有的API
    //首先要导入#import <objc/runtime.h>
    NSString *className = NSStringFromClass([UIView class]);
    //这里是uiview，可以改成自己想要的
    
    const char *cClassName = [className UTF8String];
    
    id theClass = objc_getClass(cClassName);
    
    unsigned int outCount;
    
    Method *m =  class_copyMethodList(theClass,&outCount);
    
    NSLog(@"%d",outCount);
    for (int i = 0; i<outCount; i++) {
        SEL a = method_getName(*(m+i));
        NSString *sn = NSStringFromSelector(a);
        NSLog(@"%@",sn);
    }

IOS开发之苹果私有API的使用