[iOS]UILabel改变某个范围的字符颜色和字体

/**
*改变字符串中具体某字符串的颜色
*/
+ (void)messageAction:(UILabel *)theLab changeString:(NSString *)change andAllColor:(UIColor *)allColor andMarkColor:(UIColor *)markColor andMarkFondSize:(float)fontSize {
NSString *tempStr = theLab.text;
NSMutableAttributedString *strAtt = [[NSMutableAttributedString alloc] initWithString:tempStr];
[strAtt addAttribute:NSForegroundColorAttributeName value:allColor range:NSMakeRange(0, [strAtt length])];
NSRange markRange = [tempStr rangeOfString:change];
[strAtt addAttribute:NSForegroundColorAttributeName value:markColor range:markRange];
[strAtt addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue" size:fontSize] range:markRange];
theLab.attributedText = strAtt;
}

/*
*x*y
*改变字符start 和 end 之间的字符的颜色 和 字体大小
*/
+ (void)messageAction:(UILabel *)theLab startString:(NSString *)start endString:(NSString *)end andAllColor:(UIColor *)allColor andMarkColor:(UIColor *)markColor andMarkFondSize:(float)fontSize {
NSString *tempStr = theLab.text;
NSMutableAttributedString *strAtt = [[NSMutableAttributedString alloc] initWithString:tempStr];
[strAtt addAttribute:NSForegroundColorAttributeName value:allColor range:NSMakeRange(0, [strAtt length])];
// 'x''y'字符的范围
NSRange tempRange = NSMakeRange(0, 0);
if ([self judgeStringIsNull:start]) {
tempRange = [tempStr rangeOfString:start];
}
NSRange tempRangeOne = NSMakeRange([strAtt length], 0);
if ([self judgeStringIsNull:end]) {
tempRangeOne =  [tempStr rangeOfString:end];
}
// 更改字符颜色
NSRange markRange = NSMakeRange(tempRange.location+tempRange.length, tempRangeOne.location-(tempRange.location+tempRange.length));
[strAtt addAttribute:NSForegroundColorAttributeName value:markColor range:markRange];
// 更改字体
// [strAtt addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue-Bold" size:20] range:NSMakeRange(0, [strAtt length])];
[strAtt addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue" size:fontSize] range:markRange];
theLab.attributedText = strAtt;
}

/**
*改变字符串中所有数字的颜色
*/
+ (void)setRichNumberWithLabel:(UILabel*)label Color:(UIColor *)color FontSize:(CGFloat)size {
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:label.text];
NSString *temp = nil;
for(int i =0; i < [attributedString length]; i++) {
temp = [label.text substringWithRange:NSMakeRange(i, 1)];
if ([self isPureInt:temp]) {
[attributedString setAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
color, NSForegroundColorAttributeName,
[UIFont systemFontOfSize:size],NSFontAttributeName, nil]
range:NSMakeRange(i, 1)];
}
}
label.attributedText = attributedString;
}

/**
*此方法是用来判断一个字符串是不是整型.
*如果传进的字符串是一个字符,可以用来判断它是不是数字
*/
+ (BOOL)isPureInt:(NSString *)string {
NSScanner *scan = [NSScanner scannerWithString:string];
int value;
return [scan scanInt:&value] && [scan isAtEnd];
}

/**
*判断字符串是否不全为空
*/
+ (BOOL)judgeStringIsNull:(NSString *)string {
if ([[string class] isSubclassOfClass:[NSNumber class]]) {
return YES;
}
BOOL result = NO;
if (string != nil && string.length > 0) {
for (int i = 0; i < string.length; i ++) {
NSString *subStr = [string substringWithRange:NSMakeRange(i, 1)];
if (![subStr isEqualToString:@" "] && ![subStr isEqualToString:@""]) {
result = YES;
}
}
}
return result;
}