场景还原:12升13后意外的发现点击SB创建的VC后出现崩溃问题,通过下面的报错信息实在是看不出问题出现在哪里.iOS12确实是没问题的,估计苹果可能改变了nib加载的方式.
崩溃信息:
-[UIProxyObject containsNibNamed:]: unrecognized selector sent to instance 0x6000002680c0'
原因:因为项目里面队友添加了一个防止NSDictionary赋值崩溃的分类如下
+ (void)load {
[super load];
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
Method fromMethod = class_getInstanceMethod(objc_getClass("__NSDictionaryM"), @selector(setObject:forKey:));
Method toMethod = class_getInstanceMethod(objc_getClass("__NSDictionaryM"), @selector(em_setObject:forKey:));
method_exchangeImplementations(fromMethod, toMethod);
});
}
- (void)em_setObject:(id)emObject forKey:(NSString *)key {
if (emObject && key) {
[self em_setObject:emObject forKey:key];
}
}
+ (instancetype)dictionaryWithObject:(id)object forKey:(id<NSCopying>)key{
NSMutableDictionary *dic = [super dictionary];
if (key && object) {
return dic;
}
return dic;
}
