iOS UIImageView文字头像，首字母缩略头像
2020-11-23 本文已影响0人
弹吉他的少年
前言
- 提供类似于通讯录头像，支持汉字转拼音，小写转大写，分割等操作
- 头像浏览
GitHub地址：KJCategories
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简单介绍 Property & API
NS_ASSUME_NONNULL_BEGIN
@interface UIImageViewLettersInfo : NSObject
/// 图片颜色，默认随机色
@property(nonatomic,strong)UIColor *color;
/// 是否切圆，默认yes
@property(nonatomic,assign)BOOL circle;
/// 是否取第一个，默认yes
@property(nonatomic,assign)BOOL frist;
/// 是否将汉字转拼音，默认NO
@property(nonatomic,assign)BOOL pinyin;
/// 是否将拼音转为大写，默认yes
@property(nonatomic,assign)BOOL uppercase;
/// 以该符号分割显示第一个，默认空格
@property(nonatomic,strong)NSString *partition;
/// 是否分割，默认NO
@property(nonatomic,assign)BOOL isPartition;
/// 文字信息
@property(nonatomic,strong)NSDictionary *attributes;
@end
@interface UIImageView (KJLetters)
/// 显示文字图片
- (void)kj_imageViewWithText:(NSString*)text LettersInfo:(UIImageViewLettersInfo*(^)(UIImageViewLettersInfo *info))block;
/// 浏览头像，点击全屏展示
- (void)kj_headerImageShowScreen;
/// 浏览头像，背景颜色
- (void)kj_headerImageShowScreenWithBackground:(UIColor*)color;
@end
NS_ASSUME_NONNULL_END
kj_imageViewWithText:LettersInfo:
内部我采用回调的方式来接收外界UIImageViewLettersInfo参数
使用示例
CGFloat x,y;
CGFloat sp = kAutoW(10);
CGFloat w = (kScreenW-sp*5)/4.;
CGFloat h = w+w/2;
NSArray *name = @[@"回头",@"看看",@"Z Jian",@"I Love You",@"你好",@"喜 欢",@"痛苦的信 仰",@"吗？",@"End",@"hao ba"];
for (int k=0; k<name.count; k++) {
x = k%4*(w+sp)+sp;
y = k/4*(h+sp*2)+sp+64+sp*2;
UILabel *label = [UILabel kj_createLabelWithText:name[k] FontSize:14 TextColor:UIColor.orangeColor];
label.backgroundColor = [UIColor.orangeColor colorWithAlphaComponent:0.2];
label.borderWidth = 1;
label.borderColor = UIColor.orangeColor;
label.frame = CGRectMake(x, y, w, w/3);
[self.view addSubview:label];
UIImageView *imageView = [[UIImageView alloc]init];
imageView.frame = CGRectMake(x, y+w/3+10, w, w);
[self.view addSubview:imageView];
[imageView kj_imageViewWithText:name[k] LettersInfo:^UIImageViewLettersInfo * _Nonnull(UIImageViewLettersInfo * _Nonnull info) {
if (k==0) {
info.circle = NO;
info.color = UIColor.orangeColor;
}else if (k==1) {
info.pinyin = YES;
info.uppercase = NO;
}else if (k==2) {
}else if (k==3) {
info.partition = @" ";
info.isPartition = YES;
}else if (k==4) {
info.pinyin = YES;
}else if (k==5) {
info.frist = NO;
info.isPartition = YES;
}else if (k==6) {
info.frist = NO;
info.isPartition = YES;
}else if (k==9) {
info.frist = NO;
info.uppercase = NO;
info.isPartition = YES;
}
return info;
}];
[imageView kj_AddTapGestureRecognizerBlock:^(UIView * _Nonnull view, UIGestureRecognizer * _Nonnull gesture) {
[imageView kj_headerImageShowScreen];
}];
}
Category
//
// UIImageView+KJLetters.m
// KJExtensionHandler
//
// Created by 杨科军 on 2020/11/17.
// https://github.com/yangKJ/KJExtensionHandler
#import "UIImageView+KJLetters.h"
#import <objc/runtime.h>
@implementation UIImageView (KJLetters)
/// 显示文字图片
- (void)kj_imageViewWithText:(NSString*)text LettersInfo:(UIImageViewLettersInfo*(^)(UIImageViewLettersInfo *info))block{
UIImageViewLettersInfo *info = [[UIImageViewLettersInfo alloc]init];
if (block) {
info = block(info);
if (!info.attributes) info.attributes = @{NSFontAttributeName:[self fontForFontName:nil],NSForegroundColorAttributeName:[UIColor whiteColor]};
if (info.pinyin) {
text = [self pinYin:text];
if (info.uppercase) text = text.uppercaseString;
}
if (info.frist) {
NSRange range = [text rangeOfComposedCharacterSequencesForRange:NSMakeRange(0,1)];
text = [text substringWithRange:range];
}else{
if (info.isPartition) {
NSMutableString *displayString = [NSMutableString stringWithString:info.partition];
NSMutableArray *words = [[text componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] mutableCopy];
if ([words count]) {
NSString *firstWord = [words firstObject];
if ([firstWord length]) {
NSRange range = [firstWord rangeOfComposedCharacterSequencesForRange:NSMakeRange(0,1)];
[displayString appendString:[firstWord substringWithRange:range]];
}
if ([words count] >= 2) {
NSString *lastWord = [words lastObject];
while ([lastWord length] == 0 && [words count] >= 2) {
[words removeLastObject];
lastWord = [words lastObject];
}
if ([words count] > 1) {
NSRange lastLetterRange = [lastWord rangeOfComposedCharacterSequencesForRange:NSMakeRange(0,1)];
[displayString appendString:[lastWord substringWithRange:lastLetterRange]];
}
}
}
if (info.uppercase) {
text = [displayString uppercaseString];
}else {
text = displayString.mutableCopy;
}
}
}
self.image = [self imageSnapshotFromText:text Color:info.color Circle:info.circle TextAttributes:info.attributes];
}
}
- (NSString*)pinYin:(NSString*)text{
NSMutableString *string = [text mutableCopy];
CFStringTransform((CFMutableStringRef)string,NULL,kCFStringTransformMandarinLatin,NO);
CFStringTransform((CFMutableStringRef)string,NULL,kCFStringTransformStripDiacritics,NO);
return string;
}
- (UIFont*)fontForFontName:(NSString*)fontName {
CGFloat fontSize = CGRectGetWidth(self.bounds) * 0.42;
if (fontName) {
return [UIFont fontWithName:fontName size:fontSize];
}else{
return [UIFont systemFontOfSize:fontSize];
}
}
- (UIImage*)imageSnapshotFromText:(NSString*)text Color:(UIColor*)color Circle:(BOOL)circle TextAttributes:(NSDictionary*)attributes{
CGFloat scale = [UIScreen mainScreen].scale;
CGSize size = self.bounds.size;
if (self.contentMode == UIViewContentModeScaleToFill || self.contentMode == UIViewContentModeScaleAspectFill || self.contentMode == UIViewContentModeScaleAspectFit || self.contentMode == UIViewContentModeRedraw){
size.width = floorf(size.width * scale) / scale;
size.height = floorf(size.height * scale) / scale;
}
UIGraphicsBeginImageContextWithOptions(size, NO, scale);
CGContextRef context = UIGraphicsGetCurrentContext();
if (circle) {
CGPathRef path = CGPathCreateWithEllipseInRect(self.bounds, NULL);
CGContextAddPath(context, path);
CGContextClip(context);
CGPathRelease(path);
}
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextFillRect(context, CGRectMake(0, 0, size.width, size.height));
CGSize textSize = [text sizeWithAttributes:attributes];
CGRect bounds = self.bounds;
[text drawInRect:CGRectMake(bounds.size.width/2 - textSize.width/2, bounds.size.height/2 - textSize.height/2, textSize.width, textSize.height) withAttributes:attributes];
UIImage *snapshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return snapshot;
}
/// 浏览头像，点击全屏展示
- (void)kj_headerImageShowScreen{
[self kj_headerImageShowScreenWithBackground:UIColor.blackColor];
}
- (void)kj_headerImageShowScreenWithBackground:(UIColor*)color{
UIImage *image = self.image;
CGFloat w = [UIScreen mainScreen].bounds.size.width;
CGFloat h = [UIScreen mainScreen].bounds.size.height;
UIWindow *window = [UIApplication sharedApplication].keyWindow;
UIView *backgroundView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, w, h)];
self.kOriginRect = [self convertRect:self.bounds toView:window];
backgroundView.backgroundColor = color;
backgroundView.alpha = 0;
UIImageView *imageView = [[UIImageView alloc]initWithFrame:self.kOriginRect];
imageView.image = image;
imageView.tag = 552000;
[backgroundView addSubview:imageView];
[window addSubview:backgroundView];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(kj_hideImage:)];
[backgroundView addGestureRecognizer:tap];
[UIView animateWithDuration:0.3 animations:^{
imageView.frame = CGRectMake(0,(h-image.size.height*w/image.size.width)/2, w, image.size.height*w/image.size.width);
backgroundView.alpha = 1;
} completion:^(BOOL finished) {
}];
}
- (void)kj_hideImage:(UITapGestureRecognizer*)tap{
UIView *backgroundView = tap.view;
UIImageView *imageView = (UIImageView*)[tap.view viewWithTag:552000];
[UIView animateWithDuration:0.3 animations:^{
imageView.frame = self.kOriginRect;
backgroundView.alpha = 0;
} completion:^(BOOL finished) {
[backgroundView removeFromSuperview];
}];
}
- (CGRect)kOriginRect{
return [objc_getAssociatedObject(self, @selector(kOriginRect)) CGRectValue];
}
- (void)setKOriginRect:(CGRect)kOriginRect{
NSValue *rect = [NSValue valueWithCGRect:kOriginRect];
objc_setAssociatedObject(self, @selector(kOriginRect), rect, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
@end
@implementation UIImageViewLettersInfo
- (instancetype)init{
if (self == [super init]) {
self.color = [self randomColor];
self.circle = YES;
self.frist = YES;
self.uppercase = YES;
self.partition = @" ";
}
return self;
}
- (UIColor*)randomColor{
srand48(arc4random());
float red = 0.0;
while (red < 0.1 || red > 0.84) {
red = drand48();
}
float green = 0.0;
while (green < 0.1 || green > 0.84) {
green = drand48();
}
float blue = 0.0;
while (blue < 0.1 || blue > 0.84) {
blue = drand48();
}
return [UIColor colorWithRed:red green:green blue:blue alpha:1.0f];
}
@end
