How iOS peak lets Uisearchbar occupy Fu left

Workaround: Create a new uisearchbar category, my new name here is Uisearchbar+zmsearchbarplaceholder

The code is as follows: Uisearchbar+zmsearchbarplaceholder.h

#import <UIKit/UIKit.h>
@interface uisearchbar (Zmsearchbarplaceholder)
-(void) Changeleftplaceholder: (NSString *) placeholder;
@end

Uisearchb ar+zmsearchbarplaceholder.h

 @implementation Uisearchbar (zmsearchbarplaceholder)-(void) Changeleftplaceholder: (NSString *) placeholder {
    Self.placeholder = placeholder;
    SEL centerselector = nsselectorfromstring ([nsstring stringwithformat:@ "%@%@", @ "SetCenter", @ "placeholder:"]); 
        if ([self respondstoselector:centerselector]) {BOOL centeredplaceholder = NO;
        Nsmethodsignature *signature = [[Uisearchbar class] instancemethodsignatureforselector:centerselector];
        Nsinvocation *invocation = [Nsinvocation invocationwithmethodsignature:signature];
        [Invocation settarget:self];
        [Invocation setselector:centerselector];
        [Invocation Setargument:&centeredplaceholder atindex:2];
    [Invocation invoke]; }} @end 

You can then call the method to:

-(void) Changeleftplaceholder: (NSString *) placeholder; Finally, the #uisearchbar+zmsearchbarplaceholder.h header file is imported into the Uisearchbar class in the project.