【转】iOS类似Android上toast效果

原文网址:http://m.blog.csdn.net/article/details?id=50478737

做过Android开发的人都知道toast,它会在界面上显示一排黑色背景的文字,用于提示用户信息。但iOS上并没有类似的控件,so,自己写一个吧。

原理:

说白了,Android中的toast可以理解成iOS中的一个黑色背景的UILabel。。。

效果图:

是不是还可以,什么背景颜色,字体大小,位置,统统都是可以自己设置的。

代码:

//尺寸设置
#define aiScreenWidth [UIScreen mainScreen].bounds.size.width
#define aiScreenHeight [UIScreen mainScreen].bounds.size.height
#define STATUS_BAR_HEIGHT [[UIApplication sharedApplication] statusBarFrame].size.height
#define NAVIGATION_BAR_HEIGHT self.navigationController.navigationBar.frame.size.height
#define TAB_BAR_HEIGHT self.tabBarController.tabBar.frame.size.height



- (void) addToastWithString:(NSString *)string inView:(UIView *)view {
    
    CGRect initRect = CGRectMake(0, STATUS_BAR_HEIGHT + 44, aiScreenWidth, 0);
    CGRect rect = CGRectMake(0, STATUS_BAR_HEIGHT + 44, aiScreenWidth, 22);
    UILabel* label = [[UILabel alloc] initWithFrame:initRect];
    label.text = string;
    label.textAlignment = NSTextAlignmentCenter;
    label.textColor = [UIColor whiteColor];
    label.font = [UIFont systemFontOfSize:14];
    label.backgroundColor = [UIColor colorWithRed:0 green:0.6 blue:0.9 alpha:0.6];
    
    [view addSubview:label];
    
    //弹出label
    [UIView animateWithDuration:0.5 animations:^{
        
        label.frame = rect;
        
    } completion:^ (BOOL finished){
        //弹出后持续1s
        [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(removeToastWithView:) userInfo:label repeats:NO];
    }];
}

- (void) removeToastWithView:(NSTimer *)timer {
    
    UILabel* label = [timer userInfo];
    
    CGRect initRect = CGRectMake(0, STATUS_BAR_HEIGHT + 44, aiScreenWidth, 0);
//    label消失
    [UIView animateWithDuration:0.5 animations:^{
        
        label.frame = initRect;
    } completion:^(BOOL finished){
        
        [label removeFromSuperview];
    }];
}


使用方法:

[self addToastWithString:@"更新到最新数据啦~" inView:self.view];
原文地址:https://www.cnblogs.com/wi100sh/p/5600772.html