关于提示框的小例子

来源：互联网发布：aotudesk是什么软件编辑：程序博客网时间：2024/05/22 00:38

最经写了一个关于提示框弹出的小例子，用于当某项任务完成时，提示相关的消息等等。

showeview.h

#import <UIKit/UIKit.h>

@interface showeview : UIView

+ (id) sharedInstance;

-(void)showMessage:(NSString *)message;

@end

showeview.m

#import "showeview.h"

//获取屏幕宽度、高度

#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)

#define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)

//获取设备大小

@implementation showeview

//声明一个全局唯一的静态对象，也是AccountManager类型

static showeview * _sharedInstance;

//方法实现

+ (id) sharedInstance {

@synchronized ([showeview class]) {

if (_sharedInstance == nil) {

_sharedInstance = [[showeview alloc] init];

}

return _sharedInstance;

}

-(void)showMessage:(NSString *)message

{

UIWindow * window = [UIApplication sharedApplication].keyWindow;

UIView *showview = [[UIView alloc]init];

showview.backgroundColor = [UIColor blackColor];

// showview.frame = CGRectMake(100, 500, 100, 100);

showview.alpha = 0.6f;

//设置圆角

showview.layer.cornerRadius = 5.0f;

showview.layer.masksToBounds = YES;

[window addSubview:showview];

UILabel *label = [[UILabel alloc]init];

CGSize LabelSize = [message sizeWithFont:[UIFont systemFontOfSize:17] constrainedToSize:CGSizeMake(290, 9000)];

label.frame = CGRectMake(10, 5, LabelSize.width, LabelSize.height);

label.text = message;

label.textColor = [UIColor redColor];

label.textAlignment = 1;

label.backgroundColor = [UIColor clearColor];

label.font = [UIFont boldSystemFontOfSize:15];

[showview addSubview:label];

showview.frame = CGRectMake((SCREEN_WIDTH-(LabelSize.width+20))/2,(SCREEN_HEIGHT-(LabelSize.height+10))/2, LabelSize.width+20, LabelSize.height+10);

[UIView animateWithDuration:1.5 animations:^{

showview.alpha = 0;

} completion:^(BOOL finished) {

[showview removeFromSuperview];

}];

}

@end

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