iOS8.0 UIActionSheet的字体的颜色设置
2016-04-19 本文已影响7004人
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在我们app的开发过程经常会遇到各种弹框,提示框的需求,然而系统的自带的字体颜色是如此的ugly。那我们今天就讨论一下,在ios7.0和8.0上面如何修改弹框的的title的字体颜色。
- 首先在iOS7.0修改UIActionSheet title的字体是很简单的,设置代理,在willPresentActionSheet方法中修改。代码如下:
- (void)willPresentActionSheet:(UIActionSheet *)actionSheet {
for (UIView *subViwe in actionSheet.subviews) {
if ([subViwe isKindOfClass:[UILabel class]]) {
UILabel *label = (UILabel *)subViwe;
label.font = [UIFont systemFontOfSize:16];
label.frame = CGRectMake(CGRectGetMinX(label.frame), CGRectGetMinY(label.frame), CGRectGetWidth(label.frame), CGRectGetHeight(label.frame)+20);
}
if ([subViwe isKindOfClass:[UIButton class]]) {
UIButton *button = (UIButton*)subViwe;
if ([button.titleLabel.text isEqualToString:@"确定"]) {
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
} else {
[button setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];
}
button.titleLabel.font = [UIFont systemFontOfSize:18];
}
}
}
当然自从xcode在系统8.0采用了UIAlertController过后,7.0的方法就没有用了,那么在iOS8.0过后我们怎么修改title的字体颜色呢?在这里推荐一款很好用的第三方里脊串的MMPopupView 里面的控件我觉得还是很好用的!那我就不想用第三方,只想在系统方法上修改怎么办呢。很简单,下面贴上我的代码!也就几段代码,我就不上传我的github了。
- iOS8.0 系统UIAlertController创建actionSheet的方法
UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil message: nil preferredStyle:UIAlertControllerStyleActionSheet];
[alertController addAction: [UIAlertAction actionWithTitle: @"USD($)" style: UIAlertActionStyleDefault handler:^(UIAlertAction *action) {}]];
[alertController addAction: [UIAlertAction actionWithTitle:@"RMB(¥)" style: UIAlertActionStyleDefault handler:^(UIAlertAction *action){}]];
[alertController addAction: [UIAlertAction actionWithTitle: @"取消" style: UIAlertActionStyleCancel handler:nil]];
[self presentViewController: alertController animated: YES completion: nil];
- 首先通过runtime获取对应的内部属性
包含头文件#import <objc/runtime.h>
unsigned int count = 0;
Ivar *ivars = class_copyIvarList([UIAlertAction class], &count);
for (int i = 0; i<count; i++) {
// 取出成员变量
// Ivar ivar = *(ivars + i);
Ivar ivar = ivars[i];
// 打印成员变量名字
NSLog(@"%s------%s", ivar_getName(ivar),ivar_getTypeEncoding(ivar));
}
-
获取到对应的属性我们就可以修改系统内部的默认值了
// 取消按钮 -(void)addCancelActionTarget:(UIAlertController*)alertController title:(NSString *)title
{
UIAlertAction *action = [UIAlertAction actionWithTitle:title style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
}];
[action setValue:[UIColor purpleColor] forKey:@"_titleTextColor"];
[alertController addAction:action];
}
//添加对应的title 这个方法也可以传进一个数组的titles 我只传一个是为了方便实现每个title的对应的响应事件不同的需求不同的方法
- (void)addActionTarget:(UIAlertController *)alertController title:(NSString *)title color:(UIColor *)color action:(void(^)(UIAlertAction *action))actionTarget
{
UIAlertAction *action = [UIAlertAction actionWithTitle:title style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
actionTarget(action);
}];
[action setValue:color forKey:@"_titleTextColor"];
[alertController addAction:action];
}
- 最后具体的实现代码就是这样的 大家可以复制代码自己去试试
UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
[self addActionTarget:alert title:@"星期一" color: [UIColor redColor] action:^(UIAlertAction *action) {
NSLog(@"nicaicai");
}];
[self addActionTarget:alert title:@"星期二" color: [UIColor redColor] action:^(UIAlertAction *action) {
NSLog(@"nicaicai");
}];
[self addActionTarget:alert title:@"星期三" color: [UIColor redColor] action:^(UIAlertAction *action) {
NSLog(@"nicaicai");
}];
[self addActionTarget:alert title:@"星期四" color: [UIColor redColor] action:^(UIAlertAction *action) {
NSLog(@"nicaicai");
}];
[self addCancelActionTarget:alert title:@"取消"];
[self presentViewController:alert animated:YES completion:nil];
##实现效果如下
![F9D4E954-DE0F-4624-B976-C9FB8BD86505.png](http:https://img.haomeiwen.com/i1292550/281c9cd7ac5cabf9.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)