自定义UIAlertController

主要是使用kvc的方式来自定义UIAlertController的样式:

UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"标题" message:@"内容" preferredStyle:UIAlertControllerStyleAlert];

    // 使用富文本来改变alert的title字体大小和颜色
    NSMutableAttributedString *titleText = [[NSMutableAttributedString alloc] initWithString:@"这里是标题"];
    [titleText addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:24] range:NSMakeRange(0, 2)];
    [titleText addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 2)];
    [alert setValue:titleText forKey:@"attributedTitle"];

    // 使用富文本来改变alert的message字体大小和颜色
    // NSMakeRange(0, 2) 代表:从0位置开始 两个字符
    NSMutableAttributedString *messageText = [[NSMutableAttributedString alloc] initWithString:@"这里是正文信息"];
    [messageText addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:10] range:NSMakeRange(0, 6)];
    [messageText addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 2)];
    [messageText addAttribute:NSForegroundColorAttributeName value:[UIColor brownColor] range:NSMakeRange(3, 3)];
    [alert setValue:messageText forKey:@"attributedMessage"];


    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];

    // 设置按钮背景图片
    UIImage *accessoryImage = [[UIImage imageNamed:@"selectRDImag.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    [cancelAction setValue:accessoryImage forKey:@"image"];

    // 设置按钮的title颜色
    [cancelAction setValue:[UIColor lightGrayColor] forKey:@"titleTextColor"];

    // 设置按钮的title的对齐方式
    [cancelAction setValue:[NSNumber numberWithInteger:NSTextAlignmentLeft] forKey:@"titleTextAlignment"];

    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:nil];

    [alert addAction:okAction];
    [alert addAction:cancelAction];

    [self presentViewController:alert animated:YES completion:nil];

效果如图

效果图

当然除了这种方法,还有别的方法去自定义提示框,因为假如你要为整个提示框假如背景图片,那么上述的方法就不可行了.这里我们可以自定义一个view,我觉得这才是是真正的实现自定义吧.具体如下:

先来一张效果图

#import <UIKit/UIKit.h>

@interface UpDataView : UIView

@property(nonatomic,strong)UIButton *exit;
@property(nonatomic,strong)UIButton *updataBtn;
@property(nonatomic,strong)UILabel *version;
@property(nonatomic,strong)UILabel *content;
- (void)show;
- (void)closeComplete:(void(^)(BOOL finished))complete;
@end

#import "UpDataView.h"

@interface UpDataView()

//界面
@property(nonatomic,strong)UIView * bgView;

@end

@implementation UpDataView

- (void)closeComplete:(void(^)(BOOL finished))complete{
    
    [UIView animateWithDuration:0.2 animations:^{
        self.backgroundColor = [UIColor colorWithWhite:0.f alpha:0];
        self.bgView.transform = CGAffineTransformMakeScale(0.001f, 0.001f)
        ;    } completion:complete];
}


- (id)initWithFrame:(CGRect)frame{
    if (self = [super initWithFrame:frame]) {
        self.backgroundColor = [UIColor colorWithWhite:0.f alpha:0];
        [self creatUI];
        self.userInteractionEnabled = YES;

        //下面的是重点(利用view的transform,即形变属性设置出动画效果)
        self.bgView.transform = CGAffineTransformMakeScale(0.0, 0.0);
        [UIView animateWithDuration:0.4 delay:0 usingSpringWithDamping:0.7 initialSpringVelocity:3 options:UIViewAnimationOptionCurveEaseInOut animations:^{
        self.backgroundColor = [UIColor colorWithWhite:0.f alpha:0.7];
        self.bgView.transform = CGAffineTransformIdentity;
    } completion:nil];
    }
    return self;
}

- (void)creatUI{

    UIImageView *img = [[UIImageView alloc]initWithFrame:CGRectMake(0, -57, self.bgView.frame.size.width, 155)];
    img.image = [UIImage imageNamed:@"版本更新"];
    img.userInteractionEnabled = YES;
    [self.bgView addSubview:img];
    //
    UILabel *lab = [[UILabel alloc]init];
    lab.text = @"发现新版本";
    lab.textColor = REDCOLOR;
    lab.textAlignment = NSTextAlignmentCenter;
    lab.font = [UIFont systemFontOfSize:25];
    [self.bgView addSubview:lab];
    [lab mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(@0);
        make.right.equalTo(@0);
        make.top.equalTo(@90);
    }];
    self.exit = [[UIButton alloc]initWithFrame:CGRectMake(self.bgView.frame.size.width-40, 60, 40, 40)];
    [img addSubview:self.exit];
    
    self.updataBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    self.updataBtn.backgroundColor = REDCOLOR;
    self.updataBtn.layer.cornerRadius = 5;
    self.updataBtn.layer.masksToBounds = YES;
    [self.updataBtn setTitle:@"立即更新" forState:UIControlStateNormal];
    [self.updataBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [self.bgView addSubview:self.updataBtn];
    [self.updataBtn mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(@20);
        make.right.equalTo(@-20);
        make.bottom.equalTo(@-20);
        make.height.equalTo(@40);
    }];
    
    self.version = [[UILabel alloc]init];
    self.version.textColor = BLACKCOLOR;
    self.version.font = [UIFont systemFontOfSize:15];
    [self.bgView addSubview:self.version];
    [self.version mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(lab.mas_bottom).equalTo(@10);
        make.left.equalTo(@20);
        make.right.equalTo(@-20);
    }];
    self.content = [[UILabel alloc]init];
    self.content.textColor = BLACKCOLOR;
    self.content.numberOfLines = 0;
    self.content.font = [UIFont systemFontOfSize:15];
    [self.bgView addSubview:self.content];
    __weak typeof(self) temp = self;
    [self.content mas_makeConstraints:^(MASConstraintMaker *make) {
     make.top.equalTo(temp.version.mas_bottom).equalTo(@0);
        make.left.equalTo(@20);
        make.right.equalTo(@-20);
    }];
}

- (UIView *)bgView{
    if (_bgView == nil) {
        _bgView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, SCREENWIDTH-114, SCREENHEIGHT-380)];
        _bgView.layer.position = CGPointMake(self.centerX, self.centerY-50);
        _bgView.layer.anchorPoint = CGPointMake(0.5, 0.5);
        _bgView.backgroundColor = [UIColor whiteColor];
        _bgView.layer.cornerRadius = 15;
        [self addSubview:_bgView];
    }
    return _bgView;
}
@end

//当点击了不更新移除提示框
-(void)exitAction{
    [UIView animateWithDuration:0.2 animations:^{
        self.updata.backgroundColor = [UIColor colorWithWhite:0.f alpha:0];
        self.updata.transform = CGAffineTransformMakeScale(0.001f, 0.001f)
        ;    } completion:^(BOOL finished) {
            [self.updata removeFromSuperview];
            self.view.userInteractionEnabled = YES;
            self.navigationController.interactivePopGestureRecognizer.enabled = YES;
        }];
}