NSSelectorFromString 的使用，根据字符串来调用相应名字的方法

看代码

[self doAction:@"testA" andArgObject:nil];
[self doAction:@"testB:" andArgObject:@"xixi"];

-(void) doAction:(NSString *)methodsName andArgObject:(id)objectArg
{
SEL selector = NSSelectorFromString(methodsName);
if (self)
{
if ([self respondsToSelector:selector])
{
[self performSelectorOnMainThread:selector withObject:objectArg waitUntilDone:NO];
}
}
}

-(void) testA
{
NSLog(@"do testA");
}

-(void) testB:(NSString *) str
{
NSLog(@"do testB :%@",str);
}

结果 log

2016-08-10 12:18:04.823 [94548:2783958] do testA

2016-08-10 12:18:05.602 [94548:2783958] do testB :xixi