验证号码是否符合规范(手机和座机)
- (BOOL)checkNumber:(NSString *)number{
//验证输入的固话中不带 "-"符号
NSString * strNum = @"^(0[0-9]{2,3})?([2-9][0-9]{6,7})+(-[0-9]{1,4})?$|(^(13[0-9]|15[0|3|6|7|8|9]|18[8|9])\\d{8}$)";
//验证输入的固话中带 "-"符号
//NSString * strNum = @"^(0[0-9]{2,3}-)?([2-9][0-9]{6,7})+(-[0-9]{1,4})?$|(^(13[0-9]|15[0|3|6|7|8|9]|18[8|9])\\d{8}$)";
NSPredicate *checktest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", strNum];
return [checktest evaluateWithObject:number];
}
点击拨打电话
//1，这种方法，拨打完*****回不到原来的应用，会停留在通讯录里，而且是直接拨打，不弹出提示
NSMutableString * str=[[NSMutableString alloc]initWithFormat:@"tel:%@",
@"186xxxx6979"];
// NSLog(@"str======%@",str);
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];
//2，这种方法，打完*****后还会回到原来的程序，也会弹出提示，推荐这种
NSMutableString * str=[[NSMutableString alloc]initWithFormat:@"tel:%@",@"186xxxx6979"];
UIWebView * callWebview = [[UIWebView alloc]init];
[callWebview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:str]]];
[self.view addSubview:callWebview];
//3,这种方法也会回去到原来的程序里（注意这里的telprompt），也会弹出提示
NSMutableString * str=[[NSMutableString alloc]initWithFormat:@"telprompt://%@",@"186xxxx6979"];
// NSLog(@"str======%@",str);
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:str]]
UIView跳转到控制器的方法
//首先 定义一个全局变量 UIViewController *superVC;
//然后执行这个方法
- (UIViewController *)viewController:(UIView *)view{
UIResponder *responder = view;
while ((responder = [responder nextResponder]))
if ([responder isKindOfClass: [UIViewController class]])
return (UIViewController *)responder;
return nil;
}
//最后，在你跳转页面的方法中
superVC = [self viewController:self];
[superVC.navigationController pushViewController:（UIViewController） animated:YES];
获取图片上某一点的颜色
- (UIColor *)colorAtPixel:(CGPoint)point {
// Cancel if point is outside image coordinates
if(!CGRectContainsPoint(CGRectMake(0.0f,0.0f, self.size.width, self.size.height), point)) {
return nil;
}
NSInteger pointX = trunc(point.x);
NSInteger pointY = trunc(point.y);
CGImageRef cgImage = self.CGImage;
NSUInteger width = self.size.width;
NSUInteger height = self.size.height;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
int bytesPerPixel =4;
int bytesPerRow = bytesPerPixel *1;
NSUInteger bitsPerComponent = 8
unsigned char pixelData[4] = {0,0,0,0};
CGContextRef context = CGBitmapContextCreate(pixelData,1,1,bitsPerComponent,bytesPerRow,colorSpace,kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
CGColorSpaceRelease(colorSpace);
CGContextSetBlendMode(context, kCGBlendModeCopy);
// Draw the pixel we are interested in onto the bitmap context
CGContextTranslateCTM(context, -pointX, pointY-(CGFloat)height);
CGContextDrawImage(context, CGRectMake(0.0f,0.0f, (CGFloat)width, (CGFloat)height), cgImage);
CGContextRelease(context);
// Convert color values [0..255] to floats [0.0..1.0]
CGFloat red = (CGFloat)pixelData[0] /255.0f;
CGFloat green = (CGFloat)pixelData[1] /255.0f;
CGFloat blue = (CGFloat)pixelData[2] /255.0f;
CGFloat alpha = (CGFloat)pixelData[3] /255.0f;
return [UIColor colorWithRed:red green:green blue:blue alpha:alpha];
}
UIView顺时针与逆时针旋转
//顺时针
[UIViewanimateWithDuration:0.2animations:^{
_triangle1.transform = CGAffineTransformMakeRotation(M_PI);
}];
//逆时针
[UIView animateWithDuration:0.2 animations:^{
_triangle1.transform = CGAffineTransformMakeRotation( M_PI / 180.0);
}];
计算字符串的长度（一个汉字长度为3）
- (NSUInteger)textLength: (NSString *) text{
NSUInteger asciiLength = 0;
for (NSUInteger i = 0; i < text.length; i++) {
unichar uc = [text characterAtIndex: i];
asciiLength += isascii(uc) ? 1 : 3;
}
NSUInteger unicodeLength = asciiLength;
return unicodeLength;
}
