用iOS 做一个简易计算器 (功能完备)
源代码(.m文件)
#import "ZKJAppDelegate.h"
@interface ZKJAppDelegate ()
@property (retain,nonatomic) UIView *containView;
@property (retain, nonatomic) UIButton *button;
@property (retain, nonatomic) UILabel *label;
@property (retain, nonatomic) NSMutableString *string; //保存字符
@property (assign,nonatomic) double num1,num2,num3,num4;
//num1保存输入数值,2,保存运算前数值,3是运算结果,4判断进行何种运算
@end
@implementation ZKJAppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.containView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 568)];
self.containView.backgroundColor = [UIColor clearColor];
[self.window addSubview:self.containView];
[self.containView release];
self.label = [[UILabel alloc] initWithFrame:CGRectMake(30, 40, 190, 50)];
self.label.backgroundColor = [UIColor lightGrayColor];
self.label.textAlignment = UITextAlignmentLeft;
self.label.font = [UIFont systemFontOfSize:32];
[self.containView addSubview:self.label];
[self.label release ];
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
backButton.backgroundColor = [UIColor lightGrayColor];
[backButton setFrame:CGRectMake(225, 40, 60, 50)];
[backButton setTitle:@"back" forState:UIControlStateNormal];
[backButton addTarget:self action:@selector(backClick:) forControlEvents:UIControlEventTouchUpInside];
[self.containView addSubview:backButton];
//添加1 - 9 的按钮
NSArray *array = [NSArray arrayWithObjects:@"1",
@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9", nil];
int n = 0;
for (int i = 0 ; i < 3; i++ ) {
for (int j = 0 ; j < 3; j++ ) {
self.button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
self.button.frame = CGRectMake(30 + 65 * j , 150 + 65 * i, 60 , 60);
self.button.backgroundColor = [UIColor lightGrayColor];
[self.button setTitle:array[n++] forState:UIControlStateNormal];
[self.containView addSubview:self.button];
[self.button addTarget:self action:@selector(one:) forControlEvents:UIControlEventTouchUpInside];
}
}
//添加零
UIButton *button0 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button0 setFrame:CGRectMake(30, 345, 60, 60)];
button0.backgroundColor = [UIColor lightGrayColor];
[button0 setTitle:@"0" forState:UIControlStateNormal];
[button0 addTarget:self action:@selector(one:) forControlEvents:UIControlEventTouchUpInside] ;
[self.containView addSubview:button0];
//添加点
UIButton *point = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[point setFrame:CGRectMake(95, 345, 60, 60)];
point.backgroundColor = [UIColor lightGrayColor];
[point setTitle:@"." forState:UIControlStateNormal];
[point addTarget:self action:@selector(one:) forControlEvents:UIControlEventTouchUpInside] ;
[self.containView addSubview:point];
// [point release];
//添加删除
UIButton *deleteButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[deleteButton setFrame:CGRectMake(160, 345, 60, 60)];
deleteButton.backgroundColor = [UIColor lightGrayColor];
[deleteButton setTitle:@"delete" forState:UIControlStateNormal];
[deleteButton addTarget:self action:@selector(deleteClick:) forControlEvents:UIControlEventTouchUpInside];
[self.containView addSubview:deleteButton];
// [backButton release];
//添加运算符
NSArray *array1 = [NSArray arrayWithObjects:@"+",@"-",@"*",@"/", nil];
for (int i = 0 ; i < 4; i++ ) {
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setFrame:CGRectMake(225, 150 + 65 * i, 60 , 60)];
button.backgroundColor = [UIColor lightGrayColor];
[button setTitle:array1[i] forState:UIControlStateNormal];
[self.containView addSubview:button];
[button addTarget:self action:@selector(two:) forControlEvents:UIControlEventTouchUpInside];
// [button release];
}
//添加等号
UIButton *istoButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[istoButton setFrame:CGRectMake(30, 100, 255, 40)];
istoButton.backgroundColor = [UIColor lightGrayColor];
[istoButton setTitle:@"=" forState:UIControlStateNormal];
[istoButton addTarget:self action:@selector(isto: ) forControlEvents:UIControlEventTouchUpInside];
[self.containView addSubview:istoButton];
self.string = [[NSMutableString alloc] init];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
//键盘输入 数字事件
- (void)one:(id)sender {
if ([self.string hasPrefix:@"+"] || [self.string hasPrefix:@"-"] || [self.string hasPrefix:@"*"] || [self.string hasPrefix:@"/"]) {
[self.string setString:@""];
}
//*********
[self.string appendString:[sender currentTitle]];//数字连续输入;;;
self.label.text = [NSString stringWithString:self.string];
self.num1 = [self.label.text doubleValue];//将字符串转化为基本数据类型并赋给num1;
NSLog(@"%f",self.num1);
}
//运算符事件
- (void)two:(id)sender{
[self.string setString:@""];
//*********
[self.string appendString:[sender currentTitle]];
self.label.text = self.string;
if ([self.string hasPrefix:@"+"]) {
self.num2 = self.num1;
self.num4 = 1;
} else if ([self.string hasPrefix:@"-"]){
self.num2 = self.num1;
self.num4 = 2;
} else if ([self.string hasPrefix:@"*"]) {
self.num2 = self.num1;
self.num4 = 3;
} else if ([self.string hasPrefix:@"/"]) {
self.num2 = self.num1;
self.num4 = 4;
}
}
//等号事件
- (void)isto:(id)sender{
if (self.num4 == 1) {
self.num3 = self.num2 + [self.label.text doubleValue];
self.label.text = [NSString stringWithFormat:@"%f",self.num3];
// self.num3 = 0;
[self.string setString:@""];
} else if (self.num4 == 2){
self.num3 = self.num2 - [self.label.text doubleValue];
self.label.text = [NSString stringWithFormat:@"%f",self.num3];
// self.num3 = 0;
} else if (self.num4 == 3){
self.num3 = self.num2 * [self.label.text doubleValue];
self.label.text = [NSString stringWithFormat:@"%f",self.num3];
// self.num3 = 0;
} else if (self.num4 == 4) {
self.num3 = self.num2 / [self.label.text doubleValue];
self.label.text = [NSString stringWithFormat:@"%f",self.num3];
// self.num3 = 0;
}
}
//全部删除的响应事件
- (void)deleteClick:(id)sender{
[self.string setString:@"" ];
// [self.string appendString:[sender currentTitle]];
self.label.text = self.string;
}
//消除一个数的响应事件
- (void)backClick:(id)sender{
// NSMutableString
if ([self.string length] > 0) {
NSInteger n = [self.string length];
[self.string deleteCharactersInRange:NSMakeRange(n - 1, 1)];
self.label.text = self.string;
}
}
- (void)applicationWillResignActive:(UIApplication *)application
{
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
- (void)applicationWillTerminate:(UIApplication *)application
{
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
- (void)dealloc{
[self.window release];
[super dealloc];
}
@end
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