開(kāi)發(fā)中 可能會(huì)用到的一些 方法
關(guān)于圖片處理（UIImage）
將顏色轉(zhuǎn)化為圖片
- (UIImage *)createImageWithColor:(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;
}
修改圖片大小_ OC
- (UIImage *)scaleImage:(UIImage *)img ToSize:(CGSize)itemSize
{
UIImage *i;
// 創(chuàng)建一個(gè)bitmap的context,并把它設(shè)置成為當(dāng)前正在使用的context
UIGraphicsBeginImageContext(itemSize);
CGRect imageRect=CGRectMake(0, 0, itemSize.width, itemSize.height);
// 繪制改變大小的圖片
[img drawInRect:imageRect];
// 從當(dāng)前context中創(chuàng)建一個(gè)改變大小后的圖片
i=UIGraphicsGetImageFromCurrentImageContext();
// 使當(dāng)前的context出堆棧
UIGraphicsEndImageContext();
// 返回新的改變大小后的圖片
return i;
}
修改圖片大小-Swift
func scaleImage(img:UIImage,itemSize:CGSize)->UIImage
{
var images=UIImage()
// 創(chuàng)建一個(gè)bitmap的context,并把它設(shè)置成為當(dāng)前正在使用的context
UIGraphicsBeginImageContext(itemSize)
// 繪制改變大小的圖片
images.drawInRect(CGRectMake(0, 0, itemSize.width, itemSize.height))
// 從當(dāng)前context中創(chuàng)建一個(gè)改變大小后的圖片
images = UIGraphicsGetImageFromCurrentImageContext()
// 使當(dāng)前的context出堆棧
UIGraphicsEndImageContext()
// 返回新的改變大小后的圖片
return images
}
裁剪圖片圓角_Swift
UIImage的方法
func clipImgRectCorner(direction: UIRectCorner, cornerRadius: CGFloat)->UIImage{
// 1.開(kāi)啟位圖上下文辟躏，跟圖片尺寸一樣大
UIGraphicsBeginImageContextWithOptions(self.size, false, 0);
let cornerSize = CGSizeMake(cornerRadius, cornerRadius)
// 2.1創(chuàng)建圓形的路徑
let path = UIBezierPath(roundedRect:CGRectMake(0, 0,size.width,size.height), byRoundingCorners: direction, cornerRadii: cornerSize)
// 2.2把路徑設(shè)置為裁剪區(qū)域
path.addClip()
// 3.繪制圖片
self.drawAtPoint(CGPointZero);
// 4.從上下文中獲取圖片
let clipImage = UIGraphicsGetImageFromCurrentImageContext()
// 5.關(guān)閉上下文
UIGraphicsEndImageContext();
return clipImage
}
裁剪圖片圓角_OC
- (UIImage *)clipImgRectCorner:(UIRectCorner)direction cornerRadius:(CGFloat) cornerRadius{
// 1.開(kāi)啟位圖上下文别智，跟圖片尺寸一樣大
UIGraphicsBeginImageContextWithOptions(self.size, false, 0);
CGSize cornerSize = CGSizeMake(cornerRadius, cornerRadius);
NSLog(@"%.2f",self.size.height);
// 2.1 創(chuàng)建圓形的路徑
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0,self.size.width,self.size.height) byRoundingCorners:direction cornerRadii:cornerSize];
// 2.2把路徑設(shè)置為裁剪區(qū)域
[path addClip];
// 3.繪制圖片
[self drawAtPoint:CGPointZero];
// 4.從上下文中獲取圖片
UIImage * clipImage = UIGraphicsGetImageFromCurrentImageContext();
// 5.關(guān)閉上下文
UIGraphicsEndImageContext();
return clipImage;
}
關(guān)于字符串（NSString）
去掉空格或換行
- (NSString *)removeSpaceAndNewline:(NSString *)str
{
NSString *temp = [str stringByReplacingOccurrencesOfString:@" " withString:@""];
temp = [temp stringByReplacingOccurrencesOfString:@"\r" withString:@""];
temp = [temp stringByReplacingOccurrencesOfString:@"\n" withString:@""];
return temp;
}
判斷當(dāng)前url是否合法
- (BOOL)isCurrentURLAvaliable:(NSString *)urlstring
{
if (![self isCurrentStringAvailable:urlstring]) {
return NO;
}
NSString * urlFormat = @"^(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",urlFormat];
if ([predicate evaluateWithObject:urlstring]){
return YES;
}
return NO;
}
驗(yàn)證郵箱是否合法
- (BOOL) isEmail: (NSString *)emaile
{
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:emaile];
}
判斷一個(gè)字符串是否可用
- (BOOL)isCurrentStringAvailable:(NSString *)string
{
BOOL available = NO;
if (string && [string isKindOfClass:[NSString class]] && (![string isEqualToString:@""]) && (![string isEqual:[NSNull null]]) && ([[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] length] > 0)){
available = YES;
}
return available;
}
判斷一個(gè)字符串是否是整型數(shù)字
- (BOOL)isPureInt:(NSString *)string
{
BOOL isPure;
NSScanner* scan = [NSScanner scannerWithString:string];
int val;
isPure = [scan scanInt:&val] && [scan isAtEnd];
return isPure;
}
判斷一個(gè)字符串是否是浮點(diǎn)型數(shù)字
- (BOOL)isPureFloat:(NSString *)string
{
BOOL isPure;
NSScanner* scan = [NSScanner scannerWithString:string];
float val;
isPure = [scan scanFloat:&val] && [scan isAtEnd];
return isPure;
}
判斷當(dāng)前手機(jī)號(hào)是否正確
- (BOOL)isCurrentMobileNumAvailable:(NSString *)mobileStr
{
//字符串是否可用 在上面
if (![self isCurrentStringAvailable:mobileStr]){
return NO;
}
if ([mobileStr length]!= 11){
return NO;
}
NSString *ALL = @"^13[\\d]{9}$|^14[5,7]{1}\\d{8}$|^15[^4]{1}\\d{8}$|^17[0,3,5,6,7,8]{1}\\d{8}$|^18[\\d]{9}|^19[8,9]\\d{8}|^16[6]\\d{8}$";
NSPredicate *regextestall = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", ALL];
return [regextestall evaluateWithObject:mobileStr];
}
判斷一個(gè)字符串是否包含中文
-(BOOL)isCurrentIncludeChinese:(NSString *)str
{
for(int i=0; i< [str length];i++)
{
int a = [str characterAtIndex:i];
if( a >=0x4e00 && a <= 0x9fff)
{
return YES;
}
}
return NO;
}
判斷是否全部為中文
-(BOOL)isCurrentIsChinese:(NSString *)str
{
for(int i=0; i< [str length];i++)
{
int a = [str characterAtIndex:i];
if( a >= 0x4e00 && a <= 0x9fff)
{
}else{
return NO;
}
}
return YES;
}
UILable 相關(guān)
根據(jù)字體大小 和 高度 計(jì)算寬度
/**
@prame content 內(nèi)容
@prame fontSize 字體大小
@prame height 高度
@return 寬度
*/
+ (CGFloat)calculateLableWidth:(NSString *)content
fontSize:(NSUInteger)fontSize
height:(CGFloat)height{
NSDictionary *dic = @{NSFontAttributeName:[UIFont systemFontOfSize:fontSize]};
CGRect rect = [content boundingRectWithSize:CGSizeMake(0, height)
options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
attributes:dic context:nil];
return rect.size.width;
}
根據(jù)字體大小 和 寬度 計(jì)算高度
/**
@prame content 內(nèi)容
@prame fontSize 字體大小
@prame height 寬度
@return 高度
*/
+ (CGFloat)calculateLableHeight:(NSString *)content
fontSize:(NSInteger)fontSize
width:(CGFloat)width{
NSDictionary *dic = @{NSFontAttributeName:[UIFont systemFontOfSize:fontSize]};
CGRect rect = [content boundingRectWithSize:CGSizeMake(width, 0)
options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
attributes:dic context:nil];
return rect.size.height;
}
