@selector有多个参数 [英] @selector with multiple arguments
本文介绍了@selector有多个参数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何用多个参数调用@selector方法？
How does one call an @selector method with multiple arguments?
我有以下
[self performSelector:@selector(changeImage:withString:) withObject:A1 withObject:fileString2 afterDelay:0.1];
但获得
无法识别的选择器发送到实例
unrecognized selector sent to instance
错误
我的方法我打电话如下
-(void) changeImage: (UIButton *) button withString: (NSString *) string
{
[button setImage:[UIImage imageNamed:string] forState:UIControlStateNormal];
}
推荐答案
你应该使用NSInvocation
You should use NSInvocation
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:
[self methodSignatureForSelector:@selector(changeImage:withString:)]];
[invocation setTarget:self];
[invocation setSelector:@selector(changeImage:withString:)];
[invocation setArgument:A1 atIndex:2];
[invocation setArgument:fileString2 atIndex:3];
[NSTimer scheduledTimerWithTimeInterval:0.1f invocation:invocation repeats:NO];
这篇关于@selector有多个参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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