相关疑难解决方法(0)

我想打电话给(void)setDoubleValue:(double)value使用performSelectorOnMainThread:.

我认为会起作用的是:

NSNumber *progress = [NSNumber numberWithDouble:50.0];
[progressIndicator performSelectorOnMainThread:@selector(setDoubleValue:)
                                    withObject:progress
                                 waitUntilDone:NO];

没工作.

然后我实现了一个辅助方法:

- (void)updateProgressIndicator:(NSNumber *)progress
{
    [progressIndicator setDoubleValue:[progress doubleValue]];
}

工作,但不是很干净.

之后我尝试了NSInvocation.

NSInvocation *setDoubleInvocation;;
SEL selector = @selector(setDoubleValue:);
NSMethodSignature *signature;
signature = [progressIndicator methodSignatureForSelector:selector];
setDoubleInvocation = [NSInvocation invocationWithMethodSignature:signature];
[setDoubleInvocation setSelector:selector];
[setDoubleInvocation setTarget:progressIndicator];

double progress = 50.0;
[setDoubleInvocation setArgument:&progress atIndex:2];

[setDoubleInvocation performSelectorOnMainThread:@selector(invoke)
                                      withObject:nil
                                   waitUntilDone:NO];

这个解决方案有效,但它使用了大量代码并且速度很慢.(即使我存储了调用.)

还有其他方法吗？

我这样做了

[(OfficeLinQViewController*)sharedManager.m_o  performSelectorOnMainThread:@selector(findLocalListing::)
                                                               withObject:(folderList,path) 
                                                            waitUntilDone:NO];