1.获得屏幕图像
- (UIImage *)imageFromView: (UIView *) theView
{
UIGraphicsBeginImageContext(theView.frame.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[theView.layer renderInContext:context];
UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}
2.label的动态size
- (CGSize)labelAutoCalculateRectWith:(NSString*)text FontSize:(CGFloat)fontSize MaxSize:(CGSize)maxSize
{
NSMutableParagraphStyle* paragraphStyle = [[NSMutableParagraphStyle alloc]init];
paragraphStyle.lineBreakMode=NSLineBreakByWordWrapping;
NSDictionary* attributes [email protected]{NSFontAttributeName:[UIFont fontWithName:@"MicrosoftYaHei" size:fontSize],NSParagraphStyleAttributeName:paragraphStyle.copy};
CGSize labelSize = [text boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading|NSStringDrawingTruncatesLastVisibleLine attributes:attributes context:nil].size;
labelSize.height=ceil(labelSize.height);
return labelSize;
}
3.时间戳转化为时间
-(NSString*)TimeTrasformWithDate:(NSString *)dateString
{
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:@"YY-MM-dd HH:mm"];
[formatter setTimeZone:[NSTimeZone timeZoneWithName:@"Asia/Beijing"]];
NSString *date = [formatter stringFromDate:[NSDate dateWithTimeIntervalSince1970:dateString.integerValue]];
//NSLog(@"date1:%@",date);
return date;
}
4.RGB转化成颜色
+ (UIColor *)colorFromHexRGB:(NSString *)inColorString
{
UIColor *result = nil;
unsigned int colorCode = 0;
unsigned char redByte, greenByte, blueByte;
if (nil != inColorString)
{
NSScanner *scanner = [NSScanner scannerWithString:inColorString];
(void) [scanner scanHexInt:&colorCode]; // ignore error
}
redByte = (unsigned char) (colorCode >> 16);
greenByte = (unsigned char) (colorCode >> 8);
blueByte = (unsigned char) (colorCode); // masks off high bits
result = [UIColor
colorWithRed: (float)redByte / 0xff
green: (float)greenByte/ 0xff
blue: (float)blueByte / 0xff
alpha:1.0];
return result;
}
5.加边框
UIRectCorner corners=UIRectCornerTopLeft | UIRectCornerTopRight;
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:view.bounds
byRoundingCorners:corners
cornerRadii:CGSizeMake(4, 0)];
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = view.bounds;
maskLayer.path = maskPath.CGPath;
view.layer.mask = maskLayer;
6.//压缩图片
+ (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize
{
//创建一个图形上下文形象
UIGraphicsBeginImageContext(newSize);
// 告诉旧图片画在这个新的环境,所需的
// new size
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
//获取上下文的新形象
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
// 结束上下文
UIGraphicsEndImageContext();
return newImage;
}
7.textfield的placeholder
[textF setValue:[UIColor whiteColor] forKeyPath:@"_placeholderLabel.textColor"];
[textF setValue:[UIFont boldSystemFontOfSize:15] forKeyPath:@"_placeholderLabel.font"];
8.
butLeft. imageEdgeInsets = UIEdgeInsetsMake (7 , 5 , 7 , 25 );
butLeft.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
9.//调用此方法改变label最后2个字符的大小
- (void)label:(UILabel *)label BehindTextSize:(NSInteger)integer
{
NSMutableAttributedString *mutaString = [[NSMutableAttributedString alloc] initWithString:label.text];
[mutaString addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:16] range:NSMakeRange(label.text.length-2, 2)];
label.attributedText = mutaString;
}
10.- (void)ChangeLabelTextColor:(UILabel *)label
{
NSMutableAttributedString *mutaString = [[NSMutableAttributedString alloc] initWithString:label.text];
[mutaString addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithRed:207/255.0 green:34/255.0 blue:42/255.0 alpha:1] range:NSMakeRange(0, 5)];
label.attributedText = mutaString;
}
11.
if ([tableView respondsToSelector:@selector(setSeparatorInset:)]) {
[tableView setSeparatorInset:UIEdgeInsetsZero];
}
if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
if ([tableView respondsToSelector:@selector(setLayoutMargins:)]) {
[tableView setLayoutMargins:UIEdgeInsetsZero];
}
}
// Do any additional setup after loading the view.
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {
[cell setSeparatorInset:UIEdgeInsetsZero];
}
if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
[cell setLayoutMargins:UIEdgeInsetsZero];
}
}
}