为了和安卓版提示统一，写了一个简单的toast页面，下面上代码
创建一个UIView,有俩属性UILable和NSTimer
@property (nonatomic, strong) UILabel *label;
@property (nonatomic, strong) NSTimer *timer;
一个获得当前ViewController的+号方法
+(UIViewController *)getCurrentVC{
UIViewController *result = nil;
UIWindow * window = [[UIApplication sharedApplication] keyWindow];//获得当前window
//如果当前window不是正常的window，找到等级为Normal的window
if (window.windowLevel != UIWindowLevelNormal){
NSArray *windows = [[UIApplication sharedApplication] windows];
for(UIWindow * tmpWin in windows){
if (tmpWin.windowLevel == UIWindowLevelNormal){
window = tmpWin;
break;
}
}
}
UIView *frontView = [[window subviews] objectAtIndex:0];//获得当前view
id nextResponder = [frontView nextResponder];
if ([nextResponder isKindOfClass:[UIViewController class]])
{
result = nextResponder;
if([result isKindOfClass:[UITabBarController class]]){
UITabBarController *tabVc=(UITabBarController *)result;
result=tabVc.selectedViewController;
}
if([result isKindOfClass:[UINavigationController class]]){
UINavigationController *tabVc=(UINavigationController *)result;
result = tabVc.viewControllers.lastObject;//NavigationController控制多个ViewController时 数组里最后的那个就是当前的
}
}else{
result = window.rootViewController;
}
return result;
}
接下来只要在init方法里获得当前viewController并展示就行了
这里写了一个设置title的+号方法
+ (void)showWithTitle:(NSString *)title{
CGSize titleSize = [NSString adaptiveWithText:title fontName:@"system" size:12 rect:CGSizeMake(10000, 20)];
CGRect frame = CGRectMake((ScreenWidth - titleSize.width - 15) / 2 , ScreenHeight / 3 * 2, titleSize.width + 10, titleSize.height + 10);
StaffAlertView *alertView = [[StaffAlertView alloc]initWithFrame:frame];
alertView.backgroundColor = [UIColor blackColor];
alertView.layer.cornerRadius = CGRectGetHeight(frame) / 4;
alertView.label = [[UILabel alloc]initWithFrame:CGRectMake(6, 4, titleSize.width, titleSize.height)];
alertView.label.textColor = [UIColor whiteColor];
alertView.label.textAlignment = NSTextAlignmentCenter;
alertView.label.font = [UIFont systemFontOfSize:12];
alertView.label.text = title;
[[StaffAlertView getCurrentVC].view addSubview:self];
[alertView performSelector:@selector(dismiss:) withObject:alertView afterDelay:2.0];
[alertView addSubview:alertView.label];
}
- (void)dismiss:(UIView *)view{
[view removeFromSuperview];
}
写完了测试了下，发现如果有键盘存在的时候会被遮挡住。这时候就需要利用window来展示
UIWindow *window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
_window.windowLevel = UIWindowLevelAlert;//window等级设为最高
[window addSubview:alertView];
[_window makeKeyAndVisible];//展示该window
- (void)dismiss:(UIView *)view{
[_window resignKeyWindow];
}
再测试下 结果出现提示的时候键盘会回收 提示完了键盘才会弹出来 这是因为我们新建的window 把键盘window替代了。这时候就应该获得当前window并展示。最后更改如下
UIWindow *window = [[UIApplication sharedApplication] windows].lastObject;
[window addSubview:alertView];
[alertView performSelector:@selector(dismiss:) withObject:alertView afterDelay:2.0];
[alertView addSubview:alertView.label];
- (void)dismiss:(UIView *)view{
[view removeFromSuperview];
}
最后完美的展示了。
年尾项目赶工，很久没上。以后慢慢补上，坚持一周一篇，新年加油！