OC开发中会遇到根据字符串和字体大小来算计算出字符串所占的宽高->> 封装方法如下:
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@interface XSDKResourceUtil : NSObject
//获取字符串宽
+(CGSize)measureSinglelineStringSize:(NSString*)str andFont:(UIFont*)wordFont;
//获取字符串宽 // 传一个字符串和字体大小来返回一个字符串所占的宽度
+(float)measureSinglelineStringWidth:(NSString*)str andFont:(UIFont*)wordFont;
//获取字符串高 // 传一个字符串和字体大小来返回一个字符串所占的高度
+(float)measureMutilineStringHeight:(NSString*)str andFont:(UIFont*)wordFont andWidthSetup:(float)width;
+(UIImage*)imageAt:(NSString*)imgNamePath;
+(BOOL)xsdkcheckName:(NSString*)name;
+(BOOL)xsdkcheckPhone:(NSString *)userphone;
+ (UIColor *)xsdkcolorWithHexString:(NSString *)color alpha:(CGFloat)alpha;
+(BOOL)xsdkstringIsnilOrEmpty:(NSString*)string;
+(BOOL)jsonFieldIsNull:(id)jsonField;
+(int)filterIntValue:(id)value withDefaultValue:(int)defaultValue;
+(NSString*)filterStringValue:(id)value withDefaultValue:(NSString*)defaultValue;
@end
// -------------------------------------方法具体实现-------------------------------------------
#import "XSDKResourceUtil.h"
@implementation XSDKResourceUtil
+(float)measureMutilineStringHeight:(NSString*)str andFont:(UIFont*)wordFont andWidthSetup:(float)width{
if (str == nil || width <= 0) return 0;
CGSize measureSize;
if([[UIDevice currentDevice].systemVersion floatValue] < 7.0){
measureSize = [str sizeWithFont:wordFont constrainedToSize:CGSizeMake(width, MAXFLOAT) lineBreakMode:NSLineBreakByWordWrapping];
}else{
measureSize = [str boundingRectWithSize:CGSizeMake(width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:wordFont, NSFontAttributeName, nil] context:nil].size;
}
return ceil(measureSize.height);
}
// 传一个字符串和字体大小来返回一个字符串所占的宽度
+(float)measureSinglelineStringWidth:(NSString*)str andFont:(UIFont*)wordFont{
if (str == nil) return 0;
CGSize measureSize;
if([[UIDevice currentDevice].systemVersion floatValue] < 7.0){
measureSize = [str sizeWithFont:wordFont constrainedToSize:CGSizeMake(MAXFLOAT, MAXFLOAT) lineBreakMode:NSLineBreakByWordWrapping];
}else{
measureSize = [str boundingRectWithSize:CGSizeMake(0, 0) options:NSStringDrawingUsesFontLeading attributes:[NSDictionary dictionaryWithObjectsAndKeys:wordFont, NSFontAttributeName, nil] context:nil].size;
}
return ceil(measureSize.width);
}
+(CGSize)measureSinglelineStringSize:(NSString*)str andFont:(UIFont*)wordFont
{
if (str == nil) return CGSizeZero;
CGSize measureSize;
if([[UIDevice currentDevice].systemVersion floatValue] < 7.0){
measureSize = [str sizeWithFont:wordFont constrainedToSize:CGSizeMake(MAXFLOAT, MAXFLOAT) lineBreakMode:NSLineBreakByWordWrapping];
}else{
measureSize = [str boundingRectWithSize:CGSizeMake(0, 0) options:NSStringDrawingUsesFontLeading attributes:[NSDictionary dictionaryWithObjectsAndKeys:wordFont, NSFontAttributeName, nil] context:nil].size;
}
return measureSize;
}
//+(UIImage*)imageAt:(NSString*)imgNamePath{
// if (imgNamePath == nil || [[imgNamePath stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]length] == 0) {
// return nil;
// }
// return [UIImage imageNamed:[ImageResourceBundleName stringByAppendingPathComponent:imgNamePath]];
//}
+(BOOL)xsdkcheckName:(NSString*)name{
if([XSDKResourceUtil xsdkstringIsnilOrEmpty:name]){
return NO;
}else{
if(name.length < 5){
return NO;
}
if(name.length > 20){
return NO;
}
NSPredicate * pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", @"^[a-zA-Z][a-zA-Z0-9_]*$"];
if(![pred evaluateWithObject:name]){
return [XSDKResourceUtil xsdkcheckPhone:name];
}
}
return YES;
}
+(BOOL)xsdkcheckPhone:(NSString *)userphone
{
NSPredicate * phone = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", @"^1\\d{10}"];
if (![phone evaluateWithObject:userphone]) {
return NO;
}
return YES;
}
+(BOOL)xsdkstringIsnilOrEmpty:(NSString*)string{
if (string == nil || [string isKindOfClass:[NSNull class]] || [string isEqualToString:@""]) {
return YES;
}else{
return NO;
}
}
+(UIColor *)xsdkcolorWithHexString:(NSString *)color alpha:(CGFloat)alpha
{
//删除字符串中的空格
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// String should be 6 or 8 characters
if ([cString length] < 6)
{
return [UIColor clearColor];
}
// 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 ([cString hasPrefix:@"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 ([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:alpha];
}
+(BOOL)jsonFieldIsNull:(id)jsonField{
return (jsonField == nil || [jsonField isKindOfClass:[NSNull class]]);
}
+(int)filterIntValue:(id)value withDefaultValue:(int)defaultValue{
if (![XSDKResourceUtil jsonFieldIsNull:value]) {
return [value intValue];
}else{
return defaultValue;
}
}
+(NSString*)filterStringValue:(id)value withDefaultValue:(NSString*)defaultValue{
if ([value isKindOfClass:[NSString class]] && ![XSDKResourceUtil xsdkstringIsnilOrEmpty:value]) {
return value;
}else{
return defaultValue;
}
}
@end