#import "UIColor+hexColor.h"
@implementation UIColor (hexColor)
+ (UIColor *)hexColor:(NSString *)hexColor{
if ([hexColor length] < 6) {
return nil;
}
unsigned int red,green,blue;
NSRange range;
range.length = 2;
range.location = 0;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&red];
range.location = 2;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&green];
range.location = 4;
[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&blue];
return [UIColor colorWithRed:(float)(red/255.f) green:(float)(green / 255.f) blue:(float)(blue / 255.f) alpha:1.f];
}
@end
@interface ConditionJudgmentController : NSObject
//輸入框中只能輸入數(shù)字和小數(shù)點(diǎn)，且小數(shù)點(diǎn)只能輸入一位，參數(shù)number 可以設(shè)置小數(shù)的位數(shù)，該函數(shù)在-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string調(diào)用；
+(BOOL)isValidAboutInputText:(UITextField *)textfield shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string? decimalNumber: (NSInteger) number;
@end
#import "ConditionJudgmentController.h"
@implementation ConditionJudgmentController
+(BOOL)isValidAboutInputText:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string decimalNumber:(NSInteger)number{
NSScanner? ? ? *scanner? ? = [NSScanner scannerWithString:string];
NSCharacterSet *numbers;
NSRange? ? ? ? pointRange = [textField.text rangeOfString:@"."];
if ( (pointRange.length > 0) && (pointRange.location < range.location? || pointRange.location > range.location + range.length) ){
numbers = [NSCharacterSet characterSetWithCharactersInString:@"0123456789"];
}else{
numbers = [NSCharacterSet characterSetWithCharactersInString:@"0123456789."];
}
if ( [textField.text isEqualToString:@""] && [string isEqualToString:@"."] ){
return NO;
}
short remain = number; //保留 number位小數(shù)
NSString *tempStr = [textField.text stringByAppendingString:string];
NSUInteger strlen = [tempStr length];
if(pointRange.length > 0 && pointRange.location > 0){ //判斷輸入框內(nèi)是否含有“.”。
if([string isEqualToString:@"."]){ //當(dāng)輸入框內(nèi)已經(jīng)含有“.”時(shí)，如果再輸入“.”則被視為無效。
return NO;
}
if(strlen > 0 && (strlen - pointRange.location) > remain+1){ //當(dāng)輸入框內(nèi)已經(jīng)含有“.”，當(dāng)字符串長度減去小數(shù)點(diǎn)前面的字符串長度大于需要要保留的小數(shù)點(diǎn)位數(shù)，則視當(dāng)次輸入無效。
return NO;
}
}
NSRange zeroRange = [textField.text rangeOfString:@"0"];
if(zeroRange.length == 1 && zeroRange.location == 0){ //判斷輸入框第一個(gè)字符是否為“0”
if(![string isEqualToString:@"0"] && ![string isEqualToString:@"."] && [textField.text length] == 1){ //當(dāng)輸入框只有一個(gè)字符并且字符為“0”時(shí)，再輸入不為“0”或者“.”的字符時(shí)，則將此輸入替換輸入框的這唯一字符。
textField.text = string;
return NO;
}else{
if(pointRange.length == 0 && pointRange.location > 0){ //當(dāng)輸入框第一個(gè)字符為“0”時(shí)，并且沒有“.”字符時(shí)，如果當(dāng)此輸入的字符為“0”，則視當(dāng)此輸入無效。
if([string isEqualToString:@"0"]){
return NO;
}
}
}
}
NSString *buffer;
if ( ![scanner scanCharactersFromSet:numbers intoString:&buffer] && ([string length] != 0) ){
return NO;
}else{
return YES;
}
}
@end
