标签：object .class nil ati stack call ras because cal
@implementation NSArray (LXZArray)
+ (void)load { [super load]; Method fromMethod = class_getInstanceMethod(objc_getClass("__NSArrayI"), @selector(objectAtIndex:)); Method toMethod = class_getInstanceMethod(objc_getClass("__NSArrayI"), @selector(lxz_objectAtIndex:)); method_exchangeImplementations(fromMethod, toMethod);}- (id)lxz_objectAtIndex:(NSUInteger)index { if (self.count-1 < index) { // 这里做一下异常处理，不然都不知道出错了。 @try { return [self lxz_objectAtIndex:index]; } @catch (NSException *exception) { // 在崩溃后会打印崩溃信息，方便我们调试。 NSLog(@"---------- %s Crash Because Method %s ----------\n", class_getName(self.class), __func__); NSLog(@"%@", [exception callStackSymbols]); return nil; } @finally {} } else { return [self lxz_objectAtIndex:index]; }}@end标签：object .class nil ati stack call ras because cal
原文地址：https://www.cnblogs.com/diyigechengxu/p/9219713.html
