标签：color io for ar cti size ad on
<p>//注:只能实现简单的加减乘除,不可以连续运算</p><p>#define kButton_Color [UIColor cyanColor]//定义键的背景颜色宏,便于更改颜色</p>@interface YJAppDelegate ()
{
UIView *_containter;
UIButton *_numberButton;
UILabel *_label;
CGFloat num1,operators ,result,digital;
NSMutableString *_string;
NSString *_symbolText;
}
@end<pre name="code" class="objc">_containter = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 568)];
_containter.backgroundColor = [UIColor grayColor];
[self.window addSubview:_containter];
[_containter release];
//设置数字
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++) {
_numberButton = [UIButton buttonWithType:UIButtonTypeSystem];
_numberButton.frame = CGRectMake( (j * 80), 180 + (i * 80), 78, 78);
[_numberButton setTitle:[array objectAtIndex:n++] forState:UIControlStateNormal];
_numberButton.backgroundColor = kButton_Color;
_numberButton.titleLabel.font = [UIFont systemFontOfSize:22];
_numberButton.layer.cornerRadius = 30;
[_numberButton addTarget:self action:@selector(number:) forControlEvents:UIControlEventTouchUpInside];
[_containter addSubview:_numberButton];
}
}
//设置返回键
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeSystem];
backButton.frame = CGRectMake(240, 180, 78, 78);
[backButton setTitle:@"Back" forState:UIControlStateNormal];
backButton.backgroundColor = kButton_Color;
backButton.titleLabel.font = [UIFont systemFontOfSize:22];
backButton.layer.cornerRadius = 30;
[backButton addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside
];
[_containter addSubview:backButton];
//设置符号键
NSArray *array2 = [NSArray arrayWithObjects:@"+",@"-",@"*",@"/", nil];
for (int i = 0; i < 4; i++) {
UIButton *symbolButton = [UIButton buttonWithType:UIButtonTypeSystem];
symbolButton.frame = CGRectMake(240, 260+ (i * 80), 78, 78);
[symbolButton setTitle:[array2 objectAtIndex:i] forState:UIControlStateNormal];
symbolButton.backgroundColor = kButton_Color;
symbolButton.titleLabel.font = [UIFont systemFontOfSize:22];
symbolButton.layer.cornerRadius = 30;
[symbolButton addTarget:self action:@selector(symbol:) forControlEvents:UIControlEventTouchUpInside];
[_containter addSubview:symbolButton];
}
//设置0和.
NSArray *array3 = [NSArray arrayWithObjects:@"0",@".", nil];
for (int i = 0; i < 2; i++) {
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.frame = CGRectMake( 80 + (i * 80), 420, 78, 78);
button.backgroundColor = kButton_Color;
button.titleLabel.font = [UIFont systemFontOfSize:22];
button.layer.cornerRadius = 30;
[button setTitle:[array3 objectAtIndex:i] forState:UIControlStateNormal];
[button addTarget:self action:@selector(button:) forControlEvents:UIControlEventTouchUpInside];
[_containter addSubview:button];
}
//设置归零键
UIButton *acButton = [UIButton buttonWithType:UIButtonTypeSystem];
acButton.frame = CGRectMake(0, 420, 78, 78);
acButton.backgroundColor = kButton_Color;
acButton.layer.cornerRadius = 30;
acButton.titleLabel.font = [UIFont systemFontOfSize:22];
[acButton setTitle:@"AC" forState:UIControlStateNormal];
[acButton addTarget:self action:@selector(ac:) forControlEvents:UIControlEventTouchUpInside];
[_containter addSubview:acButton];
//设置等号键
UIButton *equalButton = [UIButton buttonWithType:UIButtonTypeSystem];
equalButton.frame = CGRectMake(0, 500, 240, 68);
equalButton.backgroundColor = kButton_Color;
equalButton.titleLabel.font = [UIFont systemFontOfSize:22];
equalButton.layer.cornerRadius = 30;
[equalButton setTitle:@"=" forState:UIControlStateNormal];
[equalButton addTarget:self action:@selector(equal:) forControlEvents:UIControlEventTouchUpInside];
[_containter addSubview:equalButton];
//设置显示窗口
_label = [[UILabel alloc]initWithFrame:CGRectMake(10, 80, 300, 60)];
_label.backgroundColor = [UIColor whiteColor];
_label.textColor = [UIColor blueColor];
_label.layer.cornerRadius = 3;
_label.textAlignment = NSTextAlignmentLeft;
_label.font = [UIFont systemFontOfSize:20];
[_containter addSubview:_label];
[_label release];
//设置显示的文字为字符串
_string = [[NSMutableString alloc ]init];//配置数字键触发
- (void)number:(UIButton *)number
{
[_string appendString:[number currentTitle]];
_label.text = [NSString stringWithString:_string];
num1 = [_label.text doubleValue];
}
//配置0和.的触发
- (void)button:(UIButton *)button
{
[_string appendString:[button currentTitle]];
_label.text = [NSString stringWithString:_string];
num1 = [_label.text doubleValue];
}
//配置运算符键的触发
- (void)symbol:(UIButton *)symbol
{
[_string setString:@""];
[_string appendString:[symbol currentTitle]];
_label.text = [NSString stringWithString:_string];
if ([_string hasPrefix:@"+"]) {
digital = num1;//存储第一次输入的数字
operators = 1;//存储输入的运算符
[_string setString:@""];//输入运算符后将界面清空
} else if ([_string hasPrefix:@"-"]) {
digital = num1;
operators = 2;
// [_string setString:@""];
} else if ([_string hasPrefix:@"*"]) {
digital = num1;
operators = 3;
[_string setString:@""];
} else if ([_string hasSuffix:@"/"]) {
digital = num1;
operators = 4;
[_string setString:@""];
}
}
//配置等号键的触发
- (void)equal:(UIButton *)equal
{
if (operators == 1) {
result = digital + [_label.text doubleValue];//[_label.text doubleValue]为第二次输入的数字
_label.text = [NSString stringWithFormat:@"%g",result];//显示结果
[_string setString:@""];//将结果清空
} else if (operators == 2) {
result = digital - ( -[_label.text doubleValue] );
_label.text = [NSString stringWithFormat:@"%g",result];
[_string setString:@""];
} else if (operators == 3) {
result = digital * [_label.text doubleValue];
_label.text = [NSString stringWithFormat:@"%g",result];
[_string setString:@""];
} else if (operators == 4) {
result = digital / [_label.text doubleValue];
_label.text = [NSString stringWithFormat:@"%g",result];
[_string setString:@""];
}
}
//配置归零键的触发
- (void)ac:(UIButton *)ac
{
[_string setString:@""];
result = 0;
operators = 0;
_label.text = @"0";
}
//配置返回键的触发
- (void)back:(UIButton *)back
{
if (![_label.text isEqual:@""])
{
[_string deleteCharactersInRange:NSMakeRange([_string length] - 1, 1)];//删除最后一个字符
_label.text = [NSString stringWithString:_string];//显示删除了的字符串
num1 = [_label.text floatValue];//将删除了的数字接收
}
}
标签：color io for ar cti size ad on
原文地址：http://blog.csdn.net/canyeyj/article/details/38727121
