IOS 开发中的一些实用公共方法

1.事件字符串转NSDate  格式：yyyy-MM-dd hh:mm:ss

+ (NSDate*)DateFromString:(NSString*)uiDate
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init] ;
[formatter setDateFormat:@"yyyy-MM-dd hh:mm:ss"];
NSDate *date=[formatter dateFromString:uiDate];
return date;
}

2./**
*视图添加角标
*superview: 父视图
*strBadgeValue: 角标数字
*/

+ (UIView *)addBadgeViewTo:(UIView *)superview withBadgeValue:(NSString *)strBadgeValue
{
UITabBar *tabBar = [[UITabBar alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 50)];
UITabBarItem *item = [[UITabBarItem alloc] initWithTitle:@"" image:nil tag:0];
item.badgeValue = strBadgeValue;
NSArray *array = [[NSArray alloc] initWithObjects:item, nil];
tabBar.items = array;
//寻找
for (UIView *viewTab in tabBar.subviews) {
for (UIView *subview in viewTab.subviews) {
NSString *strClassName = [NSString stringWithUTF8String:object_getClassName(subview)];
if ([strClassName isEqualToString:@"UITabBarButtonBadge"] ||
[strClassName isEqualToString:@"_UIBadgeView"]) {
//从原视图上移除
[subview removeFromSuperview];
//
[superview addSubview:subview];
subview.frame = CGRectMake(superview.frame.size.width-15, -5,
subview.frame.size.width, subview.frame.size.height);
return subview;
}
}
}
return nil;
}

3.视图移除角标

+ (void)removeBadgeValue:(NSArray *)subviews
{
//
for (UIView *subview in subviews) {
NSString *strClassName = [NSString stringWithUTF8String:object_getClassName(subview)];
if ([strClassName isEqualToString:@"UITabBarButtonBadge"] ||
[strClassName isEqualToString:@"_UIBadgeView"]) {
[subview removeFromSuperview];
break;
}
}
}

4.设置圆角按钮

+ (void)setCornersBtn:(UIButton *)btn text:(NSString *)text{
[btn setBackgroundColor:[UIColor whiteColor]];
[btn setTitle:text forState:UIControlStateNormal];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
btn.layer.borderColor=[[UIColor lightGrayColor] CGColor];
btn.layer.borderWidth=1;
btn.layer.cornerRadius=4;
}

5.根据文本内容自适应高度

+ (void)setCornersTextView:(UITextView *)tv{
tv.font=[UIFont systemFontOfSize:14];
tv.textColor=[UIColor blackColor];
tv.layer.borderColor=[[UIColor lightGrayColor] CGColor];
tv.layer.borderWidth=1;
tv.layer.cornerRadius=4;
}

6.获取本机语言

+ (NSString*)getPreferredLanguage

{

NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults];

NSArray * allLanguages = [defaults objectForKey:@"AppleLanguages"];

NSString * preferredLang = [allLanguages objectAtIndex:0];

NSLog(@"当前语言:%@", preferredLang);

return preferredLang;
}

7.把字典对象转换成json对象

+ (NSString *)dictionaryToJson:(NSDictionary *)dic
{
NSError *parseError = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];
return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}

8.设置UIView所有控件不可交互，只有某个控件可以交互

+ (void)setUserInteractionInView:(UIView *)currentView without:(UIView *)subView{
NSArray *subViews = [currentView subviews];
if (subViews.count >0) {
for (UIView *view in subViews) {
if ([self isCurrentView:view contain:subView]) {
[view setUserInteractionEnabled:YES];
[self setUserInteractionInView:view without:subView];
}else{
[view setUserInteractionEnabled:NO];
}
if ([view isKindOfClass:[subView class]]) {
[view setUserInteractionEnabled:YES];

}
}
}
[currentView setUserInteractionEnabled:YES];
}

9.图片局部拉伸,图片名、上距离、左距离、下距离、右距离、模式1:拉伸、模式2:平铺

+ (UIImage *)ImageWithCapInsets:(NSString *)ImageName andtop:(CGFloat)Top andleft:(CGFloat)Left andbottom:(CGFloat)Bottom andright:(CGFloat)Right andtype:(NSInteger)Type
{
UIImage* img=[UIImage imageNamed:ImageName];//原图
UIEdgeInsets edge=UIEdgeInsetsMake(Top, Left, Bottom, Right);
//UIImageResizingModeStretch：拉伸模式，通过拉伸UIEdgeInsets指定的矩形区域来填充图片
//UIImageResizingModeTile：平铺模式，通过重复显示UIEdgeInsets指定的矩形区域来填充图
NSInteger tp;
if (Type == 1) {
tp = UIImageResizingModeStretch;
}else{
tp = UIImageResizingModeTile;
}

img= [img resizableImageWithCapInsets:edge resizingMode:tp];
return img;
}

10.将颜色以图片的形式展示

+ (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 *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}

11.磁盘总空间

+ (CGFloat)diskOfAllSizeMBytes{
CGFloat size = 0.0;
NSError *error;
NSDictionary *dic = [[NSFileManager defaultManager]attributesOfFileSystemForPath:NSHomeDirectory()error:&error];
if (error) {
#ifdef DEBUG
NSLog(@"error: %@", error.localizedDescription);
#endif
}else{
NSNumber *number = [dic objectForKey:NSFileSystemSize];
size = [number floatValue]/1024/1024;
}
return size;
}

12.磁盘可用空间

+ (CGFloat)diskOfFreeSizeMBytes{
CGFloat size = 0.0;
NSError *error;
NSDictionary *dic = [[NSFileManager defaultManager]attributesOfFileSystemForPath:NSHomeDirectory()error:&error];
if (error) {
#ifdef DEBUG
NSLog(@"error: %@", error.localizedDescription);
#endif
}else{
NSNumber *number = [dic objectForKey:NSFileSystemFreeSize];
size = [number floatValue]/1024/1024;
}
return size;
}

13.获取文件大小

+ (long long)fileSizeAtPath:(NSString *)filePath{
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:filePath]) return 0;
return [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];
}

14.获取文件夹下所有文件的大小

+ (long long)folderSizeAtPath:(NSString *)folderPath{
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:folderPath]) return 0;
NSEnumerator *filesEnumerator = [[fileManager subpathsAtPath:folderPath]objectEnumerator];
NSString *fileName;
long long folerSize = 0;
while ((fileName = [filesEnumerator nextObject]) != nil) {
NSString *filePath = [folderPath stringByAppendingPathComponent:fileName];
folerSize += [self fileSizeAtPath:filePath];
}
return folerSize;
}

15.判断手机号码格式是否正确

+ (BOOL)valiMobile:(NSString *)mobile{
mobile = [mobile stringByReplacingOccurrencesOfString:@" "withString:@""];
if (mobile.length != 11)
{
return NO;
}else{
/**
* 移动号段正则表达式
*/
NSString *CM_NUM = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))\\d{8}|(1705)\\d{7}$";
/**
* 联通号段正则表达式
*/
NSString *CU_NUM = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))\\d{8}|(1709)\\d{7}$";
/**
* 电信号段正则表达式
*/
NSString *CT_NUM = @"^((133)|(153)|(177)|(18[0,1,9]))\\d{8}$";
NSPredicate *pred1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM_NUM];
BOOL isMatch1 = [pred1 evaluateWithObject:mobile];
NSPredicate *pred2 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU_NUM];
BOOL isMatch2 = [pred2 evaluateWithObject:mobile];
NSPredicate *pred3 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT_NUM];
BOOL isMatch3 = [pred3 evaluateWithObject:mobile];

if (isMatch1 || isMatch2 || isMatch3) {
return YES;
}else{
return NO;
}
}
}

16.判断邮箱格式是否正确

+ (BOOL)isAvailableEmail:(NSString *)email {
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:email];
}

17.将十六进制颜色转换为 UIColor 对象

+ (UIColor *)colorWithHexString:(NSString *)color{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]uppercaseString];
// String should be 6 or 8 characters
if ([cString length] < 6) {
return [UIColor clearColor];
}
// strip "0X" or "#" if it appears
if ([cString hasPrefix:@"0X"])
cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cString substringFromIndex:1];
if ([cString length] != 6)
return [UIColor clearColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
//r
NSString *rString = [cString substringWithRange:range];
//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];
//b
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
unsigned int r, g, b;
[[NSScanner scannerWithString:rString]scanHexInt:&r];
[[NSScanner scannerWithString:gString]scanHexInt:&g];
[[NSScanner scannerWithString:bString]scanHexInt:&b];
return [UIColor colorWithRed:((float) r / 255.0f)green:((float) g / 255.0f)blue:((float) b / 255.0f)alpha:1.0f];
}

18.对图片进行滤镜处理

// 怀旧 --> CIPhotoEffectInstant                         单色 --> CIPhotoEffectMono
// 黑白 --> CIPhotoEffectNoir                            褪色 --> CIPhotoEffectFade
// 色调 --> CIPhotoEffectTonal                           冲印 --> CIPhotoEffectProcess
// 岁月 --> CIPhotoEffectTransfer                        铬黄 --> CIPhotoEffectChrome
// CILinearToSRGBToneCurve, CISRGBToneCurveToLinear, CIGaussianBlur, CIBoxBlur, CIDiscBlur, CISepiaTone, CIDepthOfField
+ (UIImage *)filterWithOriginalImage:(UIImage *)image filterName:(NSString *)name{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc]initWithImage:image];
CIFilter *filter = [CIFilter filterWithName:name];
[filter setValue:inputImage forKey:kCIInputImageKey];
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}

19.对图片进行模糊处理

// CIGaussianBlur ---> 高斯模糊
// CIBoxBlur      ---> 均值模糊(Available in iOS 9.0 and later)
// CIDiscBlur     ---> 环形卷积模糊(Available in iOS 9.0 and later)
// CIMedianFilter ---> 中值模糊, 用于消除图像噪点, 无需设置radius(Available in iOS 9.0 and later)
// CIMotionBlur   ---> 运动模糊, 用于模拟相机移动拍摄时的扫尾效果(Available in iOS 9.0 and later)
+ (UIImage *)blurWithOriginalImage:(UIImage *)image blurName:(NSString *)name radius:(NSInteger)radius{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc]initWithImage:image];
CIFilter *filter;
if (name.length != 0) {
filter = [CIFilter filterWithName:name];
[filter setValue:inputImage forKey:kCIInputImageKey];
if (![name isEqualToString:@"CIMedianFilter"]) {
[filter setValue:@(radius)forKey:@"inputRadius"];
}
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}else{
return nil;
}
}

20./**
*  调整图片饱和度, 亮度, 对比度
*
*  @param image      目标图片
*  @param saturation 饱和度
*  @param brightness 亮度: -1.0 ~ 1.0
*  @param contrast   对比度
*
*/

+ (UIImage *)colorControlsWithOriginalImage:(UIImage *)image
saturation:(CGFloat)saturation
brightness:(CGFloat)brightness
contrast:(CGFloat)contrast{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc]initWithImage:image];
CIFilter *filter = [CIFilter filterWithName:@"CIColorControls"];
[filter setValue:inputImage forKey:kCIInputImageKey];

[filter setValue:@(saturation)forKey:@"inputSaturation"];
[filter setValue:@(brightness)forKey:@"inputBrightness"];
[filter setValue:@(contrast)forKey:@"inputContrast"];

CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}

21.全屏截图

+ (UIImage *)shotScreen{
UIWindow *window = [UIApplication sharedApplication].keyWindow;
UIGraphicsBeginImageContext(window.bounds.size);
[window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}

22.截取view生成一张图片

+ (UIImage *)shotWithView:(UIView *)view{
UIGraphicsBeginImageContext(view.bounds.size);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}

23.压缩图片到指定尺寸大小

+ (UIImage *)compressOriginalImage:(UIImage *)image toSize:(CGSize)size{
UIImage *resultImage = image;
UIGraphicsBeginImageContext(size);
[resultImage drawInRect:CGRectMake(0, 0, size.width, size.height)];
UIGraphicsEndImageContext();
return resultImage;
}

24.绘制虚线

/*
** lineFrame:     虚线的 frame
** length:        虚线中短线的宽度
** spacing:       虚线中短线之间的间距
** color:         虚线中短线的颜色
*/
+ (UIView *)createDashedLineWithFrame:(CGRect)lineFrame
lineLength:(int)length
lineSpacing:(int)spacing
lineColor:(UIColor *)color{
UIView *dashedLine = [[UIView alloc]initWithFrame:lineFrame];
dashedLine.backgroundColor = [UIColor clearColor];
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
[shapeLayer setBounds:dashedLine.bounds];
[shapeLayer setPosition:CGPointMake(CGRectGetWidth(dashedLine.frame) / 2, CGRectGetHeight(dashedLine.frame))];
[shapeLayer setFillColor:[UIColor clearColor].CGColor];
[shapeLayer setStrokeColor:color.CGColor];
[shapeLayer setLineWidth:CGRectGetHeight(dashedLine.frame)];
[shapeLayer setLineJoin:kCALineJoinRound];
[shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:length], [NSNumber numberWithInt:spacing], nil]];
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 0, 0);
CGPathAddLineToPoint(path, NULL, CGRectGetWidth(dashedLine.frame), 0);
[shapeLayer setPath:path];
CGPathRelease(path);
[dashedLine.layer addSublayer:shapeLayer];
return dashedLine;
}