一些常用工具拓展

来源：互联网发布：数据表现手法的作用编辑：程序博客网时间：2024/05/17 22:24

NSString.h

/**

* 设置段落样式

* @param lineSpacing 行高

* @param textcolor 字体颜色

* @param font 字体

* @return 富文本

- (NSAttributedString *)stringWithParagraphlineSpeace:(CGFloat)lineSpacing

textColor:(UIColor *)textcolor

textFont:(UIFont *)font;

/**

* 计算富文本字体高度

* @param lineSpeace 行高

* @param font 字体

* @param width 字体所占宽度

* @return 富文本高度

- (CGFloat)getSpaceLabelHeightwithSpeace:(CGFloat)lineSpeace withFont:(UIFont*)font withWidth:(CGFloat)width;

/**

* 设置在一个文本中所有特殊字符的特殊颜色

* @pragma allStr 所有字符串

* @pragma specifiStr 特殊字符

* @pragma color 默认特殊字符颜色红色

* @pragma font 默认字体 systemFont 17.号字

**/

+ (NSMutableAttributedString *)setAllText:(NSString *)allStr andSpcifiStr:(NSString *)specifiStr;

+ (NSMutableAttributedString *)setAllText:(NSString *)allStr andSpcifiStr:(NSString *)specifiStr withColor:(UIColor *)color specifiStrFont:(UIFont *)font;

/**

* 16位颜色色值处理

+ (UIColor *)colorWithHexString:(NSString *)color alpha:(CGFloat)alpha;

+ (UIColor *)colorWithHexString:(NSString *)color;

//获取有效小数

+ (NSString*)getTheCorrectNum:(NSString*)tempString;

/**

* MD5加密

- (NSString *)stringFromMD5;

================================================================================================================================

NSString.m

/**

* 设置段落样式

* @param lineSpacing 行高

* @param textcolor 字体颜色

* @param font 字体

* @return 富文本

- (NSAttributedString *)stringWithParagraphlineSpeace:(CGFloat)lineSpacing

textColor:(UIColor *)textcolor

textFont:(UIFont *)font {

// 设置段落

NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStylealloc]init];

paragraphStyle.lineSpacing = lineSpacing;

// NSKernAttributeName字体间距

NSDictionary *attributes =@{NSParagraphStyleAttributeName:paragraphStyle};

NSMutableAttributedString * attriStr = [[NSMutableAttributedStringalloc]initWithString:selfattributes:attributes];

// 创建文字属性

NSDictionary * attriBute =@{NSForegroundColorAttributeName:textcolor,NSFontAttributeName:font};

[attriStr addAttributes:attriButerange:NSMakeRange(0,self.length)];

return attriStr;

}

/**

* 计算富文本字体高度

* @param lineSpeace 行高

* @param font 字体

* @param width 字体所占宽度

* @return 富文本高度

- (CGFloat)getSpaceLabelHeightwithSpeace:(CGFloat)lineSpeace withFont:(UIFont*)font withWidth:(CGFloat)width {

NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStylealloc]init];

// paraStyle.lineBreakMode = NSLineBreakByCharWrapping;

/** 行高 */

paraStyle.lineSpacing = lineSpeace;

// NSKernAttributeName字体间距

NSDictionary *dic =@{NSFontAttributeName:font,NSParagraphStyleAttributeName:paraStyle};

CGSize size = [selfboundingRectWithSize:CGSizeMake(width,MAXFLOAT)options:NSStringDrawingUsesLineFragmentOriginattributes:diccontext:nil].size;

return size.height;

}

#pragma mark -- 设置在一个文本中所有特殊字符的特殊颜色

+ (NSMutableAttributedString *)setAllText:(NSString *)allStr andSpcifiStr:(NSString *)specifiStr withColor:(UIColor *)color specifiStrFont:(UIFont *)font {

NSMutableAttributedString *mutableAttributedStr = [[NSMutableAttributedStringalloc]initWithString:allStr];

if (color ==nil) {

color = [UIColorredColor];

}

if (font ==nil) {

font = [UIFontsystemFontOfSize:17.];

}

// NSArray *array = [allStr componentsSeparatedByString:specifiStr];//array.cout-1是所有字符特殊字符出现的次数

NSRange searchRange =NSMakeRange(0, [allStrlength]);

NSRange range;

//拿到所有的相同字符的range

while ((range = [allStrrangeOfString:specifiStroptions:0range:searchRange]).location !=NSNotFound) {

//改变多次搜索时searchRange的位置

searchRange = NSMakeRange(NSMaxRange(range), [allStrlength] -NSMaxRange(range));

//设置富文本

[mutableAttributedStr addAttribute:NSForegroundColorAttributeNamevalue:colorrange:range];

[mutableAttributedStr addAttribute:NSFontAttributeNamevalue:fontrange:range];

}

return mutableAttributedStr;

}

+ (NSMutableAttributedString *)setAllText:(NSString *)allStr andSpcifiStr:(NSString *)specifiStr {

return [selfsetAllText:allStrandSpcifiStr:specifiStr withColor:nilspecifiStrFont:nil];

}

+ (UIColor *)colorWithHexString:(NSString *)color alpha:(CGFloat)alpha {

//删除字符串中的空格

NSString *cString = [[colorstringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceAndNewlineCharacterSet]]uppercaseString];

// String should be 6 or 8 characters

if ([cStringlength] <6) {

return [UIColorclearColor];

}

// strip 0X if it appears

//如果是0x开头的，那么截取字符串，字符串从索引为2的位置开始，一直到末尾

if ([cStringhasPrefix:@"0X"]) {

cString = [cString substringFromIndex:2];

}

//如果是#开头的，那么截取字符串，字符串从索引为1的位置开始，一直到末尾

if ([cStringhasPrefix:@"#"]) {

cString = [cString substringFromIndex:1];

}

if ([cStringlength] !=6) {

return [UIColorclearColor];

}

// Separate into r, g, b substrings

NSRange range;

range.location =0;

range.length =2;

//r

NSString *rString = [cStringsubstringWithRange:range];

//g

range.location =2;

NSString *gString = [cStringsubstringWithRange:range];

//b

range.location =4;

NSString *bString = [cStringsubstringWithRange:range];

// Scan values

unsignedint r, g, b;

[[NSScannerscannerWithString:rString]scanHexInt:&r];

[[NSScannerscannerWithString:gString]scanHexInt:&g];

[[NSScannerscannerWithString:bString]scanHexInt:&b];

return [UIColorcolorWithRed:((float)r /255.0f) green:((float)g /255.0f)blue:((float)b /255.0f)alpha:alpha];

}

//默认alpha值为1

+ (UIColor *)colorWithHexString:(NSString *)color {

return [selfcolorWithHexString:coloralpha:1.0f];

}

* 处理一个数字加小数点的字符串,前面无0,保留两位。网上有循环截取的方法,如果数字过长,浪费内存,这个方法在优化内存的基础上设计的。

+ (NSString*)getTheCorrectNum:(NSString*)tempString {

//先判断第一位是不是 . ,是 .补0

if ([tempStringhasPrefix:@"."]) {

tempString = [NSStringstringWithFormat:@"0%@",tempString];

}

//计算截取的长度

NSUInteger endLength = tempString.length;

//判断字符串是否包含 .

if ([tempStringcontainsString:@"."]) {

//取得 .的位置

NSRange pointRange = [tempStringrangeOfString:@"."];

//判断 .后面有几位

NSUInteger f = tempString.length -1 - pointRange.location;

//如果大于2位就截取字符串保留两位,如果小于两位,直接截取

if (f >2) {

endLength = pointRange.location +2;

}

//先将tempString转换成char型数组

NSUInteger start =0;

constchar *tempChar = [tempStringUTF8String];

//遍历,去除取得第一位不是0的位置

for (int i =0; i < tempString.length; i++) {

if (tempChar[i] =='0') {

start++;

}else {

break;

}

//如果第一个字母为 . start后退一位

if (tempChar[start] =='.') {

start--;

}

//根据最终的开始位置,计算长度,并截取

NSRange range = {start,endLength - start};

tempString = [tempString substringWithRange:range];

return tempString;

}

- (NSString *)stringFromMD5 {

if(self ==nil || [selflength] == 0)

returnnil;

constchar *value = [selfUTF8String];

unsignedchar outputBuffer[CC_MD5_DIGEST_LENGTH];

CC_MD5(value, (int)strlen(value), outputBuffer);

NSMutableString *outputString = [[NSMutableStringalloc]initWithCapacity:CC_MD5_DIGEST_LENGTH *2];

for(NSInteger count =0; count <CC_MD5_DIGEST_LENGTH; count++){

[outputString appendFormat:@"%02x",outputBuffer[count]];

}

returnSAFE_AUTORELEASE(outputString);

}

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