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 <UIKit/UIKit.h> 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。
