琐碎的“ + [NSTimerchededTimerWithTimeInterval：repeats：block：]：无法识别的选择器”；错误 [英] Trivial "+[NSTimer scheduledTimerWithTimeInterval:repeats:block:]: unrecognized selector" error

问题描述

在移至10.12 / Sierra和Xcode 8.1之后，我正在努力应对奇怪的错误：

I am banging my head against an odd error after a move to 10.12/Sierra and Xcode 8.1:

+[NSTimer scheduledTimerWithTimeInterval:repeats:block:]: 
     unrecognized selector sent to class 0x7fff78f1fa88

最小复制此代码的代码（创建新项目的默认设置）是：

The most minimal code (default settings of create a new project) to reproduce this is:

//  AppDelegate.m
//

#import "AppDelegate.h"

@interface AppDelegate ()

@property (weak) IBOutlet NSWindow *window;
@property (strong, nonatomic) NSTimer * timer;
@end

@implementation AppDelegate

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
    self.timer = [NSTimer scheduledTimerWithTimeInterval:10 
                           repeats:YES 
                             block:^(NSTimer * _Nonnull timer) 
   {
        NSLog(@"Ping from %@", timer);
    }];
}

链接包括（Core）Foundation类和 all_load。必须完全是微不足道的-但不能做到这一点。

The linking includes the (Core)Foundation classes and 'all_load'. Must be something totally trivial - but fail to what it is.

任何人都应感谢所有帮助。

Any and all help appreciated.

谢谢，

Dw。

推荐答案

+ [NSTimercheduledTimerWithTimeInterval：repeats： block：]是一种iOS 10.0+方法。您是不是想在iOS 9.x上运行它？

+[NSTimer scheduledTimerWithTimeInterval:repeats:block:] is an iOS 10.0+ method. Are you maybe trying to run it on iOS 9.x?

https://developer.apple.com/reference/foundation/nstimer/2091889-scheduledtimerwithtimeinterval?language=objc

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