自定义UIAlertView
code4App上面有很多很棒的UI特效代码,我们常感叹,好牛逼啊,这效果,太炫了,哇,怎么自己写不出来.其实,再炫的特效,都是根据苹果系统的框架而来,如果我们了解系统框架实现的原理,也就能写出属于自己自定义的控件,加上各种各样的动画.
这里,我就展示一个自定义的UIAlertView效果控件,视图出现的时候动画-先放大-再缩小-最后成正常比例,消失的时候缩小加渐隐.调用也很方便,不需要像系统先创建后[alert show],我在类内部就已经写好了,只需要alloc创建,调用各个按钮对应的响应block就行.
@.h
#import <UIKit/UIKit.h> typedef void(^Myblcok)(); @interface CustomAlertView : UIView - (id)initWithTitle:(NSString *)title cancelButtonTitle:(NSString *)cancelTitle firstButtonTitles:(NSString *)firstTitle senondButtonTitles:(NSString *)secondTitle thirdButtonTitles:(NSString *)thirdTitle; // 利用block将按钮的点击事件传出去 @property (nonatomic,copy)Myblcok cancelBlock; @property (nonatomic,copy)Myblcok firstBlcok; @property (nonatomic,copy)Myblcok secondBlock; @property (nonatomic,copy)Myblcok thirdBlock; @end @interface UIImage (colorful) + (UIImage *)imageWithColor:(UIColor *)color; @end@.m
//
// CustomAlertView.m
// CustomAlertView
//
// Created by 胡明涛 on 14-5-6.
// Copyright (c) 2014年 胡明涛. All rights reserved.
//
#import "CustomAlertView.h"
// 屏幕的物理高度
#define ScreenHeight [UIScreen mainScreen].bounds.size.height
// 屏幕的物理宽度
#define ScreenWidth [UIScreen mainScreen].bounds.size.width
#define AlertViewHeight 260
#define AlertViewWidth 200
@interface CustomAlertView ()
@property (nonatomic,strong) UIView *backgroundView; // 底部View,阻挡其他事件响应
@property (nonatomic,strong) UILabel *titleLabel; // 标题
@property (nonatomic,strong) UIButton *cancelButton; // 取消
@end
@implementation CustomAlertView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
- (id)initWithTitle:(NSString *)title cancelButtonTitle:(NSString *)cancelTitle firstButtonTitles:(NSString *)firstTitle senondButtonTitles:(NSString *)secondTitle thirdButtonTitles:(NSString *)thirdTitle{
self = [super initWithFrame:CGRectMake((ScreenWidth - AlertViewWidth)/2.0, (ScreenHeight-AlertViewHeight)/2 ,AlertViewWidth, AlertViewHeight)];
if (self) {
[self createCustomAlertView];
self.titleLabel.text = title;
[self.cancelButton setTitle:cancelTitle forState:UIControlStateNormal];
if (thirdTitle != nil) {
[((UIButton *)[self viewWithTag:200]) setTitle:firstTitle forState:UIControlStateNormal];
[((UIButton *)[self viewWithTag:201]) setTitle:secondTitle forState:UIControlStateNormal];
[((UIButton *)[self viewWithTag:202]) setTitle:thirdTitle forState:UIControlStateNormal];
}else{
[((UIButton *)[self viewWithTag:200]) setTitle:firstTitle forState:UIControlStateNormal];
((UIButton *)[self viewWithTag:200]).frame = CGRectMake(10, 60, self.bounds.size.width-20, 40);
[((UIButton *)[self viewWithTag:201]) setTitle:secondTitle forState:UIControlStateNormal];
((UIButton *)[self viewWithTag:201]).frame = CGRectMake(10, 130, self.bounds.size.width-20, 40);
[((UIButton *)[self viewWithTag:202]) removeFromSuperview];
}
__block CustomAlertView * SELF = self;
[UIView animateWithDuration:0.2 animations:^{
SELF.transform = CGAffineTransformScale(CGAffineTransformIdentity,0.5, 0.5);
}completion:^(BOOL finished) {
[UIView animateWithDuration:0.2 animations:^{
SELF.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.3, 1.3);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.2 animations:^{
SELF.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.0, 1.0);
} completion:^(BOOL finished) {
}];
}];
}];
}
// 阻碍其他响应事件
self.backgroundView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
_backgroundView.backgroundColor = [UIColor blackColor];
_backgroundView.alpha = 0.3;
[[UIApplication sharedApplication].keyWindow addSubview:_backgroundView];
[[UIApplication sharedApplication].keyWindow addSubview:self];
return self;
}
- (void)createCustomAlertView{
self.backgroundColor = [UIColor whiteColor];
self.titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, self.bounds.size.width, 40)];
_titleLabel.textColor = [UIColor redColor];
_titleLabel.textAlignment = NSTextAlignmentCenter;
[self addSubview:_titleLabel];
// 取消按钮
self.cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
_cancelButton.frame = CGRectMake(10,AlertViewHeight - 50,self.bounds.size.width-20,40);
_cancelButton.tag = 100;
[_cancelButton setBackgroundImage:[UIImage imageWithColor:[UIColor colorWithRed:227.0/255.0 green:100.0/255.0 blue:83.0/255.0 alpha:1]] forState:UIControlStateNormal];
[_cancelButton addTarget:self action:@selector(didClickButtonAction:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:_cancelButton];
for (int i = 0; i < 3; i++) {
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(10, 20 +i*60, self.bounds.size.width-20, 40);
button.tag = 200 + i;
[button setBackgroundImage:[UIImage imageWithColor:[UIColor colorWithRed:87.0/255.0 green:135.0/255.0 blue:173.0/255.0 alpha:1]] forState:UIControlStateNormal];
[button addTarget:self action:@selector(didClickButtonAction:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:button];
}
}
- (void)didClickButtonAction:(UIButton *)button{
switch (button.tag) {
case 100:
if (_cancelBlock) {
_cancelBlock();
[self dismissAlertView];
}
break;
case 200:
if (_firstBlcok) {
_firstBlcok();
[self dismissAlertView];
}
break;
case 201:
if (_secondBlock) {
_secondBlock();
[self dismissAlertView];
}
break;
case 202:
if (_thirdBlock) {
_thirdBlock();
[self dismissAlertView];
}
break;
default:
break;
}
}
// 取消视图
- (void)dismissAlertView{
[UIView animateWithDuration:1.0 animations:^{
self.transform = CGAffineTransformScale(CGAffineTransformIdentity,0.0, 0.0);
self.alpha = 0.0;
self.backgroundView.alpha = 0.0;
}completion:^(BOOL finished) {
self.cancelBlock = nil;
self.firstBlcok = nil;
self.secondBlock = nil;
self.thirdBlock = nil;
[_backgroundView removeFromSuperview];
[self removeFromSuperview];
_backgroundView = nil;
}];
}
@end
@implementation UIImage (colorful)
+ (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 *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
@end
@调用
- (void)didClickButtonAction{
CustomAlertView *alertView = [[CustomAlertView alloc] initWithTitle:@"HMT" cancelButtonTitle:@"取消" firstButtonTitles:@"first" senondButtonTitles:@"second" thirdButtonTitles:@"third"];
[alertView setCancelBlock:^(){
NSLog(@"点击了取消按钮");
}];
[alertView setFirstBlcok:^(){
NSLog(@"点击了first按钮");
}];
//............以下类似
}
@效果:(是不是觉得有的时候也能代替UIActionSheet)
