IOS AlertView动态添加按钮

    UIAlertView*    genderAlert = [[UIAlertView alloc] initWithTitle:@"颜色" message:nil delegate:self cancelButtonTitle:nil otherButtonTitles:nil, nil];
    if (_productColorArray) {
        for (int i = 0; i < _productColorArray.count; i++) {
            NSString* str = [_productColorArray objectAtIndex:i];
            if ( ![str isEqual:[NSNull null]] && str.length != 0) {
                [genderAlert addButtonWithTitle:str];
            }
        }
    }
    [genderAlert addButtonWithTitle:@"取消"];
    genderAlert.cancelButtonIndex = genderAlert.numberOfButtons-1;
    [genderAlert show];
    return;
    
UIActionSheet 添加的方法类似。