NSObject（NSObject）doesNotRecognizeSelector：崩溃

Question

崩溃报告：

    0  CoreFoundation!__exceptionPreprocess + 0x7c
    1  libobjc.A.dylib!objc_exception_throw + 0x34
    2  CoreFoundation!-[NSObject(NSObject) doesNotRecognizeSelector:] + 0xd0
    3  CoreFoundation!___forwarding___ + 0x364[enter image description here][1]
    4  CoreFoundation!_CF_forwarding_prep_0 + 0x58
    5  yyfe!__70-[InvestModel getOpenAccountRewardWithPhoneNum:identifyCode:complete:]_block_invoke [InvestModel.m : 104 + 0x4]
    6  libdispatch.dylib!_dispatch_call_block_and_release + 0x14
    7  libdispatch.dylib!_dispatch_client_callout + 0xc
    8  libdispatch.dylib!_dispatch_main_queue_callback_4CF + 0x730
    9  CoreFoundation!__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 0x8

我的代码：

    NSDictionary* data = returnDict[@"data"];
    NSInteger respStatus = [data[@"respStatus"] integerValue];

    if ([data[@"code"] isEqual: @(1)] && respStatus == 6) {
        [weakSelf saveSuccessGetOpenAccountReward];
        callback(YES,[data[@"rank"] integerValue],[data[@"amount"] integerValue],getRewardSuccess);
        return;
    }

和回调类型：

    typedef void(^GetRewardCallBack)(BOOL,NSInteger,NSInteger,GetRewardMessageType);

104 行是 callback()，returnDict 有 "rank" 和 "amount" 的值，我不确定 callback = nil 是否会导致崩溃，但 callback 不能等于 nil，知道吗？

Answer 1

搞清楚！服务器返回的 data[@"rank"] 既不是 NSString 也不是 NSNumber。所以它无法识别@selector(integerValue)

NSObject（NSObject）doesNotRecognizeSelector：崩溃

NSObject(NSObject) doesNotRecognizeSelector: crash

crash

block

objective-c