iOS自定义alertView提示框

iOS UIKit框架下自带的UIAlertView在功能或者美观上，有的时候并不能满足我们的开发需求，这个时候，就可以自定义alertView。我在这里写了一个简单的自定义alertView的Demo,希望能帮助到iOS开发的小伙们。话不多说，直接上代码：

在。h里：

#import

typedef void(^alertClick)(NSInteger index);

@interface SLAlertView : UIView
@property (nonatomic,copy) alertClick clickIndex;

- (instancetype)initWithTitle:(NSString *)title message:(NSString *)message sureBtn:(NSString *)sureTitle cancleBtn:(NSString *)cancleTitle;

- (void)show;

@end

在。m里：

#import "SLAlertView.h"
#define alertViewWidth 280 //alertView 宽
#define edge 10.0 //各个栏目之间的距离

@interface SLAlertView ()
@property (nonatomic,retain) UIView *alertView;//弹窗
@property (nonatomic,retain) UILabel *titleLbl;//title
@property (nonatomic,retain) UILabel *msgLbl;//内容
@property (nonatomic,retain) UIButton *sureBtn;//确认按钮
@property (nonatomic,retain) UIButton *cancleBtn;//取消按钮
@property (nonatomic,retain) UIView *lineView;//横线线
@property (nonatomic,retain) UIView *verLineView;//竖线
@end

@implementation SLAlertView

- (instancetype)initWithTitle:(NSString *)title message:(NSString *)message sureBtn:(NSString *)sureTitle cancleBtn:(NSString *)cancleTitle
{
    if (self == [super init]) {
        
        self.frame = [UIScreen mainScreen].bounds;
        
        self.backgroundColor = [UIColor colorWithWhite:0.8 alpha:0.6];
        
        self.alertView = [[UIView alloc] init];
        self.alertView.backgroundColor = [UIColor whiteColor];
        self.alertView.layer.cornerRadius = 8.0;
        
        self.alertView.frame = CGRectMake(0, 0, alertViewWidth, 100);
        self.alertView.layer.position = self.center;
        
        if (title) {
            
            self.titleLbl = [self GetAdaptiveLable:CGRectMake(2*edge, 2*edge, alertViewWidth-4*edge, 20) AndText:title andIsTitle:YES];
            self.titleLbl.textAlignment = NSTextAlignmentCenter;
            
            [self.alertView addSubview:self.titleLbl];
            
            CGFloat titleW = self.titleLbl.bounds.size.width;
            CGFloat titleH = self.titleLbl.bounds.size.height;
            
            self.titleLbl.frame = CGRectMake((alertViewWidth-titleW)/2, 2*edge, titleW, titleH);
            
        }
        if (message) {
            
            self.msgLbl = [self GetAdaptiveLable:CGRectMake(edge, CGRectGetMaxY(self.titleLbl.frame)+edge, alertViewWidth-2*edge, 20) AndText:message andIsTitle:NO];
            self.msgLbl.textAlignment = NSTextAlignmentCenter;
            
            [self.alertView addSubview:self.msgLbl];
            
            CGFloat msgW = self.msgLbl.bounds.size.width;
            CGFloat msgH = self.msgLbl.bounds.size.height;
            
            self.msgLbl.frame = self.titleLbl?CGRectMake((alertViewWidth-msgW)/2, CGRectGetMaxY(self.titleLbl.frame)+edge, msgW, msgH):CGRectMake((alertViewWidth-msgW)/2, 2*edge, msgW, msgH);
        }
        
        self.lineView = [[UIView alloc] init];
        self.lineView.frame = self.msgLbl?CGRectMake(0, CGRectGetMaxY(self.msgLbl.frame)+2*edge, alertViewWidth, 1):CGRectMake(0, CGRectGetMaxY(self.titleLbl.frame)+2*edge, alertViewWidth, 1);
        self.lineView.backgroundColor = [UIColor colorWithWhite:0.8 alpha:0.6];
        [self.alertView addSubview:self.lineView];
        
        //两个按钮
        if (cancleTitle && sureTitle) {
            
            self.cancleBtn = [UIButton buttonWithType:UIButtonTypeSystem];
            self.cancleBtn.frame = CGRectMake(0, CGRectGetMaxY(self.lineView.frame), (alertViewWidth-1)/2, 40);
            [self.cancleBtn setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:0.2]] forState:UIControlStateNormal];
            [self.cancleBtn setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:0.2]] forState:UIControlStateSelected];
            [self.cancleBtn setTitle:cancleTitle forState:UIControlStateNormal];
            //[self.cancleBtn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
            self.cancleBtn.tag = 1;
            [self.cancleBtn addTarget:self action:@selector(buttonEvent:) forControlEvents:UIControlEventTouchUpInside];
            
            UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.cancleBtn.bounds byRoundingCorners:UIRectCornerBottomLeft cornerRadii:CGSizeMake(5.0, 5.0)];
            CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
            maskLayer.frame = self.cancleBtn.bounds;
            maskLayer.path = maskPath.CGPath;
            self.cancleBtn.layer.mask = maskLayer;
            
            [self.alertView addSubview:self.cancleBtn];
        }
        
        if (cancleTitle && sureTitle) {
            self.verLineView = [[UIView alloc] init];
            self.verLineView.frame = CGRectMake(CGRectGetMaxX(self.cancleBtn.frame), CGRectGetMaxY(self.lineView.frame), 1, 40);
            self.verLineView.backgroundColor = [UIColor colorWithWhite:0.8 alpha:0.6];
            [self.alertView addSubview:self.verLineView];
        }
        
        if(sureTitle && cancleTitle){
            
            self.sureBtn = [UIButton buttonWithType:UIButtonTypeSystem];
            self.sureBtn.frame = CGRectMake(CGRectGetMaxX(self.verLineView.frame), CGRectGetMaxY(self.lineView.frame), (alertViewWidth-1)/2+1, 40);
            [self.sureBtn setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:0.2]] forState:UIControlStateNormal];
            [self.sureBtn setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:0.2]] forState:UIControlStateSelected];
            [self.sureBtn setTitle:sureTitle forState:UIControlStateNormal];
            //[self.sureBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
            self.sureBtn.tag = 2;
            [self.sureBtn addTarget:self action:@selector(buttonEvent:) forControlEvents:UIControlEventTouchUpInside];
            
            UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.sureBtn.bounds byRoundingCorners:UIRectCornerBottomRight cornerRadii:CGSizeMake(5.0, 5.0)];
            CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
            maskLayer.frame = self.sureBtn.bounds;
            maskLayer.path = maskPath.CGPath;
            self.sureBtn.layer.mask = maskLayer;
            
            [self.alertView addSubview:self.sureBtn];
            
        }
        
        //只有取消按钮
        if (cancleTitle && !sureTitle) {
            
            self.cancleBtn = [UIButton buttonWithType:UIButtonTypeSystem];
            self.cancleBtn.frame = CGRectMake(0, CGRectGetMaxY(self.lineView.frame), alertViewWidth, 40);
            [self.cancleBtn setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:0.2]] forState:UIControlStateNormal];
            [self.cancleBtn setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:0.2]] forState:UIControlStateSelected];
            [self.cancleBtn setTitle:cancleTitle forState:UIControlStateNormal];
            //[self.cancleBtn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
            self.cancleBtn.tag = 1;
            [self.cancleBtn addTarget:self action:@selector(buttonEvent:) forControlEvents:UIControlEventTouchUpInside];
            
            UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.cancleBtn.bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight cornerRadii:CGSizeMake(5.0, 5.0)];
            CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
            maskLayer.frame = self.cancleBtn.bounds;
            maskLayer.path = maskPath.CGPath;
            self.cancleBtn.layer.mask = maskLayer;
            
            [self.alertView addSubview:self.cancleBtn];
        }
        
        //只有确定按钮
        if(sureTitle && !cancleTitle){
            
            self.sureBtn = [UIButton buttonWithType:UIButtonTypeSystem];
            self.sureBtn.frame = CGRectMake(0, CGRectGetMaxY(self.lineView.frame), alertViewWidth, 40);
            [self.sureBtn setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:0.2]] forState:UIControlStateNormal];
            [self.sureBtn setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:0.2]] forState:UIControlStateSelected];
            [self.sureBtn setTitle:sureTitle forState:UIControlStateNormal];
            //[self.sureBtn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
            self.sureBtn.tag = 2;
            [self.sureBtn addTarget:self action:@selector(buttonEvent:) forControlEvents:UIControlEventTouchUpInside];
            
            UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.sureBtn.bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight cornerRadii:CGSizeMake(5.0, 5.0)];
            CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
            maskLayer.frame = self.sureBtn.bounds;
            maskLayer.path = maskPath.CGPath;
            self.sureBtn.layer.mask = maskLayer;
            
            [self.alertView addSubview:self.sureBtn];
            
        }
        
        //计算高度
        CGFloat alertHeight = cancleTitle?CGRectGetMaxY(self.cancleBtn.frame):CGRectGetMaxY(self.sureBtn.frame);
        self.alertView.frame = CGRectMake(0, 0, alertViewWidth, alertHeight);
        self.alertView.layer.position = self.center;
        
        [self addSubview:self.alertView];
    }
    
    return self;
}

//alertView弹出展示
- (void)show{

    //iOS8之后，[UIApplicationsharedApplication].windows有两个，第一个为UIWindow，是程序主要的keyWindow；第二个为UITextEffectsWindow，是键盘所在的window，当我们要覆盖住键盘时得在这个window上addSubview。

    [[[UIApplication sharedApplication].windows lastObject] addSubview:self];
    [self showAnimation];
}

#pragma mark - Animation  提示框弹出时的动画效果

- (void)showAnimation {
    CAKeyframeAnimation *alertViewshowAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
    alertViewshowAnimation .duration = 0.4;
    alertViewshowAnimation .values = @[[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.01f, 0.01f, 1.0f)],
                                       [NSValue valueWithCATransform3D:CATransform3DMakeScale(1.1f, 1.1f, 1.0f)],
                                       [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.9f, 0.9f, 1.0f)],
                                       [NSValue valueWithCATransform3D:CATransform3DIdentity]];
    alertViewshowAnimation.keyTimes = @[@0.2f, @0.5f, @0.75f, @1.0f];
    alertViewshowAnimation.timingFunctions = @[[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                               [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                               [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
    [_alertView.layer addAnimation:alertViewshowAnimation forKey:nil];
}

#pragma mark - alertView按钮点击回调 
- (void)buttonEvent:(UIButton *)sender
{
    if (sender.tag == 2) {
        if (self.clickIndex) {
            self.clickIndex(sender.tag);
        }
   
    [self removeFromSuperview];
}

//子视图的创建和布局
-(UILabel *)GetAdaptiveLable:(CGRect)rect AndText:(NSString *)contentStr andIsTitle:(BOOL)isTitle
{
    UILabel *contentLbl = [[UILabel alloc] initWithFrame:rect];
    contentLbl.numberOfLines = 0;
    contentLbl.text = contentStr;
    contentLbl.textAlignment = NSTextAlignmentCenter;
    if (isTitle) {
        contentLbl.font = [UIFont boldSystemFontOfSize:16.0];
    }else{
        contentLbl.font = [UIFont systemFontOfSize:14.0];
    }
    
    NSMutableAttributedString *mAttrStr = [[NSMutableAttributedString alloc] initWithString:contentStr];
    NSMutableParagraphStyle *mParaStyle = [[NSMutableParagraphStyle alloc] init];
    mParaStyle.lineBreakMode = NSLineBreakByCharWrapping;
    [mParaStyle setLineSpacing:3.0];
    [mAttrStr addAttribute:NSParagraphStyleAttributeName value:mParaStyle range:NSMakeRange(0,[contentStr length])];
    [contentLbl setAttributedText:mAttrStr];
    [contentLbl sizeToFit];
    
    return contentLbl;
}

//设置颜色
-(UIImage *)imageWithColor:(UIColor *)color
{
    CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);
    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return theImage;
}

@end

在你需要显示alert的时候：

SLAlertView *alert = [[SLAlertView alloc]initWithTitle:@"！！！" message:@"确定要删除吗？" sureBtn:@"我意已决" cancleBtn:@"我在想想"];

//点击按钮之后的回调

alert.resultIndex = ^(NSInteger index){
            NSLog(@"%d",index);
        };

[alert show];

以上就是自定义的一个简单的demo，你可以参照该demo，在此基础上进行修改，以达到你要的效果。