iOS自定义提示弹出框实现类似UIAlertView的效果

首先来看看实现的效果图

下面话不多说，以下是实现的示例代码

#import <UIKit/UIKit.h>typedef void(^AlertResult)(NSInteger index);@interface XLAlertView : UIView@property (nonatomic,copy) AlertResult resultIndex;- (instancetype)initWithTitle:(NSString *)title message:(NSString *)message sureBtn:(NSString *)sureTitle cancleBtn:(NSString *)cancleTitle;- (void)showXLAlertView;@end

#import "XLAlertView.h"///alertView 宽#define AlertW 280///各个栏目之间的距离#define XLSpace 10.0@interface XLAlertView()//弹窗@property (nonatomic,retain) UIView *alertView;//title@property (nonatomic,retain) UILabel *titleLbl;//内容@property (nonatomic,retain) UILabel *msgLbl;//确认按钮@property (nonatomic,retain) UIButton *sureBtn;//取消按钮@property (nonatomic,retain) UIButton *cancleBtn;//横线线@property (nonatomic,retain) UIView *lineView;//竖线@property (nonatomic,retain) UIView *verLineView;@end@implementation XLAlertView- (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 = 5.0;    self.alertView.frame = CGRectMake(0, 0, AlertW, 100);    self.alertView.layer.position = self.center;    if (title) {      self.titleLbl = [self GetAdaptiveLable:CGRectMake(2*XLSpace, 2*XLSpace, AlertW-4*XLSpace, 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((AlertW-titleW)/2, 2*XLSpace, titleW, titleH);    }    if (message) {      self.msgLbl = [self GetAdaptiveLable:CGRectMake(XLSpace, CGRectGetMaxY(self.titleLbl.frame)+XLSpace, AlertW-2*XLSpace, 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((AlertW-msgW)/2, CGRectGetMaxY(self.titleLbl.frame)+XLSpace, msgW, msgH):CGRectMake((AlertW-msgW)/2, 2*XLSpace, msgW, msgH);    }    self.lineView = [[UIView alloc] init];    self.lineView.frame = self.msgLbl?CGRectMake(0, CGRectGetMaxY(self.msgLbl.frame)+2*XLSpace, AlertW, 1):CGRectMake(0, CGRectGetMaxY(self.titleLbl.frame)+2*XLSpace, AlertW, 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), (AlertW-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), (AlertW-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), AlertW, 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), AlertW, 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, AlertW, alertHeight);    self.alertView.layer.position = self.center;    [self addSubview:self.alertView];  }  return self;}#pragma mark - 弹出 -- (void)showXLAlertView{  UIWindow *rootWindow = [UIApplication sharedApplication].keyWindow;  [rootWindow addSubview:self];  [self creatShowAnimation];}- (void)creatShowAnimation{  self.alertView.layer.position = self.center;  self.alertView.transform = CGAffineTransformMakeScale(0.90, 0.90);  [UIView animateWithDuration:0.25 delay:0 usingSpringWithDamping:0.8 initialSpringVelocity:1 options:UIViewAnimationOptionCurveLinear animations:^{    self.alertView.transform = CGAffineTransformMakeScale(1.0, 1.0);  } completion:^(BOOL finished) {  }];}#pragma mark - 回调 -设置只有2 -- > 确定才回调- (void)buttonEvent:(UIButton *)sender{  if (sender.tag == 2) {    if (self.resultIndex) {      self.resultIndex(sender.tag);    }  }  [self removeFromSuperview];}-(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;}-(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